Tokushima University / Educator and Researcher Directory --- Nagao, Kan

Personal Web Page

https://researchmap.jp/read0017484 (researchmap)

Field of Study

○	Prosthodontics

Subject of Study

○	高齢者の口腔ケアに関する研究 (Oral care, Denture plaque control) (高齢者の口腔の健康と全身の健康の関連性を明確にし，口腔ケアによって全身の健康促進を図る)

Book / Paper

Book:

1.	Kan Nagao : かかりつけ歯科医のための口腔機能低下症入門, Tokyo, Jul. 2022.
2.	Kan Nagao : ワンランクアップする治療の質と信頼度補綴は検査でかわる, 永末書店, Jan. 2021.
3.	Tetsuo Ichikawa and Kan Nagao : 有床義歯補綴学, 永末書店, Jan. 2021.
4.	Kan Nagao : かかりつけ歯科医のための口腔機能低下症入門, デンタルダイヤモンド社, Jul. 2020.
5.	Kan Nagao : 高齢者の状態に合わせた義歯・補綴治療, 医歯薬出版, Jul. 2020.
6.	Kan Nagao : かかりつけ歯科医のための口腔機能低下症入門, デンタルダイヤモンド社, Jan. 2019.
7.	Kan Nagao : 増補版複製義歯慣れた義歯こそ高齢者の求める義歯, 永末書店, Tokyo, Oct. 2017.
8.	Kan Nagao, Megumi Watanabe and 津村望 : 増補版複製義歯慣れた義歯こそ高齢者の求める義歯, 永末書店, Tokyo, Oct. 2017.
9.	Yoshihito Naitou, Kan Nagao and Tetsuo Ichikawa : 見る目が変わる「欠損歯列」の読み方，「欠損補綴」の設計(本多正明，宮地建夫，伊藤雄策，武田孝之編著), Quintessence Publishing CO.,Ltd., Tokyo, Jan. 2013.
10.	Tetsuo Ichikawa, Kan Nagao, Yoritoki Tomotake, Yuichi Ishida and 石田修 : リンガライズドオクルージョン -義歯の咬合・インプラントの咬合-(松本直之，市川哲雄監著), Ishiyaku Publishers,Inc., Tokyo, Sep. 2010.
11.	Yutaka Sato, Kan Nagao and Tetsuo Ichikawa : 「義歯の要件」...審美歯科・インプラントワードブック...第3章ベーシック補綴 2．デンチャー, Ishiyaku Publishers,Inc., Tokyo, Jun. 2008.
12.	Kazuo Hosoi, Yasuko Ishikawa, Kan Nagao and others : Teeth and mouth for health - A happy life supported by oral health sciences-, Ishiyaku Publishers,Inc., Tokyo, Aug. 1998.
13.	Tetsuo Ichikawa, Kan Nagao and Naoyuki Matsumoto : 強電解酸性水の歯科臨床, Quintessence Publishing CO.,Ltd., Tokyo, Sep. 1997. (Keyword) 強電解水
14.	Naoyuki Matsumoto, Kan Nagao and Fumiaki Kawano : 咬合器の選び方, Ishiyaku Publishers,Inc., Tokyo, Oct. 1995. (Keyword) 咬合器

Academic Paper (Judged Full Paper):

1.	Hideki Suito, Keiko Fujimoto, Takaharu Goto, Kan Nagao, Hidehiko Hosoki and Tetsuo Ichikawa : Effective use of an extraoral vacuum in preventing the dispersal of particulate matter from metal dental materials., Journal of Occupational Health, Vol.65, No.1, e12412, 2023. (Summary) When dentists adjust prostheses at the dental chairside, particulate matter (PM) from the dental material is dispersed. Little is known about the effective use of an extraoral vacuum (EOV) in preventing PM dispersal. This study aimed to evaluate the effective use of an EOV in preventing the dispersal of metal PM in dental offices. The following experimental conditions were planned: the distance from the EOV to the metallic materials (50, 100, 150, and 200 mm), the horizontal angle between the long axis of the micromotor handpiece and EOV (0°, 45°, and 90°), and the operating time of the EOV (during grinding, during grinding and 1 min thereafter, during grinding and the preceding 1 min, 1 min before and after grinding, and during grinding). Carborundum and silicone points were used for grinding and PM dispersal. Diameters (0.3, 0.5, 1.0, and 3.0 μm) were measured using a laser particle counter. Depending on the instrument used to grind, there were undetectable PMs of different diameters (Carborundum point: 0.3 and 0.5 μm, Silicone point: 0.3 μm). PMNs were reduced as the distance from the EOV to metal materials decreased. Operating the EOV before grinding along the long axis of the micromotor handpiece was effective in reducing the PMNs. PMNs dispersed when grinding metals were effectively reduced by positioning the EOV closer to the grinding surface (within 150 mm) along the long axis of the micromotor handpiece and operating the EOV before grinding. (Keyword) Humans / Particulate Matter / Vacuum / Dental Materials (Tokushima University Institutional Repository) ● Metadata: 119393 (Link to Publication Site) ● Publication site (DOI): 10.1002/1348-9585.12412 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 37347802 ● Summary page in Scopus @ Elsevier: 2-s2.0-85162829227 (Tokushima University Institutional Repository: 119393, DOI: 10.1002/1348-9585.12412, PubMed: 37347802, Elsevier: Scopus)
2.	Suguru Kimoto, Yasuhiko Kawai, Asako Suzuki, Yasuyo Koide, Hisatomo Kondo, Taro Nomura, Akito Tsuboi, Yoshihiko Ito, Guang Hong, Shunsuke Minakuchi, Gaku Ohwada, Yusuke Sato, Tetsuya Suzuki, Katsuhiko Kimoto, Makiko Saita, Noriyuki Hoshi, Yoshikazu Yoneyama, Yohei Sato, Masakazu Morokuma, Joji Okazaki, Takeshi Maeda, Kenichiro Nakai, Tetsuo Ichikawa, Kan Nagao, Keiko Fujimoto, Tadafumi Kurogi, Hiroshi Murata, Hitomi Okazaki, Masahiro Nishimura, Yasuhiro Nishi, Mamoru Murakami, Toshio Hosoi and Taizo Hamada : Effect of denture adhesives on masticatory performance: Multicenter randomized controlled trial., Journal of Prosthodontic Research, 2023. (Tokushima University Institutional Repository) ● Metadata: 119322 (Link to Publication Site) ● Publication site (DOI): 10.2186/jpr.JPR_D_22_00105 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 37316261 ● Search Scopus @ Elsevier (PMID): 37316261 ● Search Scopus @ Elsevier (DOI): 10.2186/jpr.JPR_D_22_00105 (Tokushima University Institutional Repository: 119322, DOI: 10.2186/jpr.JPR_D_22_00105, PubMed: 37316261)
3.	Kan Nagao, Keiko Fujimoto, Hideki Suito, Takaharu Goto, Yuichi Ishida, Megumi Watanabe and Tetsuo Ichikawa : Effect of Palatal Augmentation Prosthesis on Speech and Swallowing in Tongue Dysfunction:A Literature Review, Journal of Oral Health and Biosciences, Vol.35, No.2, 39-46, 2023. (Summary) Purpose: Palatal augmentation prosthesis (PAP) is used on patients with dysphagia and dysarthria. While several studies have evaluated the effects of PAP, evidence regarding the adaptation criteria, effects, and limitations of PAP are not well organized. This review aims to summarize its functions, limitations, and applications. Procedure: To investigate the adaptation criteria, effects, and limitations of PAP, we searched the English language literature published in PubMed from its inception through April 20, 2022. The leading search terms included ``palatal augmentation prosthesis.'' Main findings: The primary search used keywords that reflected 31 studies. Finally, nine cross-sectional studies and nine case reports were selected for full-text assessment after applying the inclusion criteria. Eleven studies described the efficacy of speech function: two for motility factors and nine for organic factors (with overlap). Thirteen studies described the effectiveness of swallowing function, four related to motility factors, and ten for organic factors (with overlap). Several studies have demonstrated that PAP effectively restores articulation and swallowing in patients with impaired tongue function after glossectomy for oropharyngeal cancer, sequelae of cranial nerve disease, or neuromuscular disease. However, few papers describe the scope of glossectomy and tongue movement restrictions, so it is impossible to describe the adaptation criteria, effects, and limitations. In this review, most case reports and cross-sectional studies did not provide information on the fabrication methods of PAP or the dentistsʼ experience. Thus, the effect of bias on palatal morphology in PAP patients remains unclear. Conclusions: The number of patients with dysarthria and dysphagia is increasing worldwide, similar to what is already occurring in Japan. Therefore, additional high-quality studies on the effects of PAP are required. (Keyword) Palatal augmentation prosthesis / Tongue dysfunction / Literature review (Tokushima University Institutional Repository) ● Metadata: 118167 (Link to Publication Site) ● Publication site (DOI): 10.20738/johb.35.2_39 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050014404356190848 ● Search Scopus @ Elsevier (DOI): 10.20738/johb.35.2_39 (Tokushima University Institutional Repository: 118167, DOI: 10.20738/johb.35.2_39, CiNii: 1050014404356190848)
4.	Yoshihiro Tagami, Keiko Fujimoto, Takaharu Goto, Hideki Suito, Kan Nagao and Tetsuo Ichikawa : Can Measurement of Ultrasonic Echo Intensity Predict Physical Frailty in Older Adults?, Diagnostics, Vol.13, No.4, 675, 2023. (Summary) Echo intensity (EI) of the tongue in ultrasonography is an easy and quantitative assessment of tongue function. Elucidating the relationship between EI and frailty, is expected to aid in the early detection of frailty and oral hypofunction in older adults. We assessed tongue function and frailty in older outpatients visiting a hospital. The subjects were 101 individuals aged 65 or older (35 men and 66 women, mean age 76.4 ± 7.0 years). Tongue pressure and EI were measured as assessments of tongue function and grip strength, and Kihon Checklist (KCL) scores were measured as assessments of frailty. In women, a significant correlation was not found between the mean EI and grip strength, whereas a significant correlation was noted between each score of the KCL and the mean EI; the scores increased as the mean EI increased. A significant positive correlation was found between tongue pressure and grip strength, but no significant correlation was observed between tongue pressure and the KCL scores. In men, no significant correlation was found between tongue assessments and frailty, except for a significant positive correlation between tongue pressure and grip strength. The results of this study suggest that EI of the tongue is positively associated with physical frailty in women and may be useful for early detection of physical frailty status. (Tokushima University Institutional Repository) ● Metadata: 118377 (Link to Publication Site) ● Publication site (DOI): 10.3390/diagnostics13040675 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 36832163 ● Search Scopus @ Elsevier (PMID): 36832163 ● Search Scopus @ Elsevier (DOI): 10.3390/diagnostics13040675 (Tokushima University Institutional Repository: 118377, DOI: 10.3390/diagnostics13040675, PubMed: 36832163)
5.	Tadafumi Kurogi, Hiroshi Murata, Erika Yamaguchi, Yasuhiko Kawai, Asako Suzuki, Yasuyo Koide, Suguru Kimoto, Hisatomo Kondo, Taro Nomura, Akito Tsuboi, Guang Hong, Yoshihiko Ito, Shunsuke Minakuchi, Gaku Ohwada, Yusuke Sato, Tetsuya Suzuki, Katsuhiko Kimoto, Noriyuki Hoshi, Makiko Saita, Yoshikazu Yoneyama, Yohei Sato, Masakazu Morokuma, Joji Okazaki, Takeshi Maeda, Kenichiro Nakai, Tetsuo Ichikawa, Kan Nagao, Keiko Fujimoto, Masahiro Nishimura, Yasuhiro Nishi, Mamoru Murakami, Toshio Hosoi and Taizo Hamada : Effects of denture adhesives on denture retention and occlusal forces in complete denture wearers: A multicenter, randomized controlled trial., Journal of Prosthodontic Research, 2023. (Summary) Application of cream-type denture adhesives effectively improves the denture retention and occlusal force in complete denture wearers with a moderate degree of difficulty during edentulism treatment. (Tokushima University Institutional Repository) ● Metadata: 119406 (Link to Publication Site) ● Publication site (DOI): 10.2186/jpr.JPR_D_22_00178 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 36740264 ● Search Scopus @ Elsevier (PMID): 36740264 ● Search Scopus @ Elsevier (DOI): 10.2186/jpr.JPR_D_22_00178 (Tokushima University Institutional Repository: 119406, DOI: 10.2186/jpr.JPR_D_22_00178, PubMed: 36740264)
6.	Yoshihiro Tagami, Keiko Fujimoto, Takaharu Goto, Hideki Suito, Kan Nagao and Tetsuo Ichikawa : Measurement of ultrasonic echo intensity predicts the mass and strength of the tongue muscles in the elderly, Journal of Oral Science, Vol.64, No.1, 44-48, 2022. (Summary) The purpose of this study was to investigate the relationship between the echo intensity (EI) on ultrasound images of the tongue, tongue thickness, and tongue pressure to examine the effectiveness of EI measurement for assessing the tongue function. A total of 100 elderly outpatients were enrolled. Tongue thickness and EI were measured using ultrasonography. The distance from mylohyoid muscle surface to dorsal surface of the tongue was measured for tongue thickness. Subsequently, this area was vertically divided into four areas: top of tongue dorsal side (DT), bottom of tongue dorsal side (DB), top of basal tongue side (BT), and bottom of basal tongue side (BB), and the EI was measured in each area. The mean EIs of DT and DB were lower than those of BT and BB. In the three areas apart from BB, the EI decreased with an increase in tongue thickness. In particular, a significant correlation between the EI in DB and tongue thickness was found. In all areas, the EI decreased with an increase in tongue pressure. The results of this study suggested that the measurement of EI could be an important indicator for assessing the tongue function in the elderly. (Keyword) Aged / Humans / Muscle Strength / Muscle, Skeletal / Muscles / Pressure / Tongue / Ultrasonics (Link to Publication Site) ● Publication site (DOI): 10.2334/josnusd.21-0351 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 34880146 ● CiNii @ National Institute of Informatics (CRID): 1390290780268628096 ● Summary page in Scopus @ Elsevier: 2-s2.0-85123812584 (DOI: 10.2334/josnusd.21-0351, PubMed: 34880146, CiNii: 1390290780268628096, Elsevier: Scopus)
7.	Keiko Fujimoto, Yuki Iwawaki, Takaharu Goto, Takahiro Kishimoto, Kan Nagao and Tetsuo Ichikawa : Objective Assessment of Poor Oral Hygiene Using the ATP Swab Test in the Elderly, Japanese Journal of Gerodontology, Vol.36, No.1, 44-52, 2021. (Summary) <p> Purpose:The purpose of this study was to evaluate the assessment of poor oral hygiene using the ATP swab test.</p><p> Method:A total of 102 consecutive elderly outpatients aged ≥65 years who visited for maintenance were enrolled between October 2019 and April 2020. The evaluation of poor oral hygiene included measurements of:Tongue Coating Index(TCI), number of bacteria by a rapid oral bacterial detection device(Bacterial Counter DU-AA01NP-H;Panasonic Health Care, Japan), and amount of ATP+AMP by the ATP swab test(Lumitester;Kikkoman, Japan). The specimens were a gargle solution rinsed with 10 mL of water for 5 seconds as soon as the patients came to the hospital or a cotton swab wiped on the tongue dorsum. The subjective assessment of hygiene of the oral mucosa and dentures was rated on a 5-point scale.</p><p> Results:In the assessment of tongue dorsum hygiene, the number of bacteria and the amount of ATP+AMP were significantly correlated with TCI. There was also a significant correlation between the number of bacteria and the amount of ATP+AMP.</p><p> Conclusion:The results of this study suggested that the ATP swab test might be used to objectively assess overall poor oral hygiene, including food residues.</p> (Keyword) elderly / poor oral hygiene / ATP swab test / bacterial counts / Tongue Coating Index (Link to Publication Site) ● Publication site (DOI): 10.11259/jsg.36.44 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390007282526004352 ● Search Scopus @ Elsevier (DOI): 10.11259/jsg.36.44 (DOI: 10.11259/jsg.36.44, CiNii: 1390007282526004352)
8.	Yoshihiko Ito, Guang Hong, Akito Tsuboi, Yasuhiko Kawai, Hisatomo Kondo, Taro Nomura, Suguru Kimoto, Atsuko Gunji, Asako Suzuki, Gaku Ohwada, Shunsuke Minakuchi, Yusuke Sato, Tetsuya Suzuki, Katsuhiko Kimoto, Noriyuki Hoshi, Makiko Saita, Yoshikazu Yoneyama, Yohei Sato, Masakazu Morokuma, Joji Okazaki, Takeshi Maeda, Kenichiro Nakai, Tetsuo Ichikawa, Kan Nagao, Keiko Fujimoto, Hiroshi Murata, Tadafumi Kurogi, Kazuma Takase, Masahiro Nishimura, Yasuhiro Nishi, Mamoru Murakami, Toshio Hosoi and Taizo Hamada : Multivariate analysis reveals oral health-related quality of life of complete denture wearers with denture adhesives: a multicenter randomized controlled trial, Journal of Prosthodontic Research, Vol.65, No.3, 353-359, 2021. (Summary) <p><b>Purpose </b>To investigate the difference in improvement of oral health-related quality of life (OHR-QoL) depending on the oral and denture conditions of a complete denture wearer when using a cream or powder type denture adhesive in a 10-center parallel randomized clinical trial.</p><p><b>Methods </b>Two hundred edentulous subjects who wore complete dentures were allocated to each of the three groups according to denture adhesive type: cream, powder, and control (saline solution). The materials were applied to the mucosal surface of the dentures for 4 days, and baseline data and data after the intervention were collected. OHR-QoL was assessed using the Japanese version of the modified Oral Health Impact Profile for Edentulous Patients (OHIP-EDENT-J) scale for outcome. Multivariate analysis was used to investigate improvements in OHR-QoL according to participant characteristics among complete denture wearers using these materials.</p><p><b>Results </b>OHIP-EDENT-J scores were significantly decreased in all groups after the intervention (p < 0.05); however, there were no statistically significant differences among the groups. Multiple logistic regression analysis revealed a significant association between the vertical height of the maxillary and mandibular alveolar ridge and OHIP-EDENT-J scores in the cream-type denture adhesive group. In contrast, there were no significant association between participant characteristics and OHIP-EDENT-J scores in the powder-type adhesive and control groups.</p><p><b>Conclusions </b>The use of denture adhesives could improve OHR-QoL for complete denture wearers. The cream-type denture adhesives may be expected to improve OHR-QoL in patients with poor residual ridge conditions compared with patients with good residual ridge conditions.</p> (Keyword) Multivariate analysis / OHR-QoL / Complete denture / Denture adhesive (Link to Publication Site) ● Publication site (DOI): 10.2186/jpr.jpr_d_20_00132 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390570620393827200 ● Search Scopus @ Elsevier (DOI): 10.2186/jpr.jpr_d_20_00132 (DOI: 10.2186/jpr.jpr_d_20_00132, CiNii: 1390570620393827200)
9.	Keiko Fujimoto, Hideki Suito, Kan Nagao and Tetsuo Ichikawa : Does Masticatory Ability Contribute to Nutritional Status in Older Individuals?, International Journal of Environmental Research and Public Health, Vol.17, No.20, 2020. (Summary) Mastication plays a primary role in the process of eating. Hence, compromised masticatory ability may affect the nutrition and quality of life, which are particularly important concerns among older individuals. It remains unclear how is the masticatory ability assessed regarding the nutritional status. We examined the effect of various oral factors on three masticatory ability tests conducted among older individuals. A total of 100 older individuals were enrolled in this study. Body mass index (BMI) as an indicator of nutritional status; and age, sex, and the number of occlusal and molar occlusal supports as clinical attributes were recorded. Three masticatory ability tests (masticatory efficiency, masticatory score, and satisfaction with mastication) were conducted, and tongue pressure, cheek pressure, and occlusal force were assessed as oral functions. A significant but weak correlation was found between masticatory efficiency and the masticatory score, but not between masticatory efficiency and satisfaction score. Objective masticatory efficiency was strongly associated with objective oral factors, whereas subjective assessments of masticatory ability (masticatory score and satisfaction score) were not. Furthermore, BMI was significantly associated with subjective assessments of masticatory ability but not with objective masticatory efficiency. Both subjective and objective assessments of masticatory ability, along with considerations of nutritional formulations, are required for the maintenance and improvement of nutritional status in older individuals. (Keyword) Aged / Female / Humans / Male / Mastication / Nutritional Status / Pressure / Quality of Life / Tongue (Tokushima University Institutional Repository) ● Metadata: 116195 (Link to Publication Site) ● Publication site (DOI): 10.3390/ijerph17207373 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 33050275 ● Search Scopus @ Elsevier (PMID): 33050275 ● Search Scopus @ Elsevier (DOI): 10.3390/ijerph17207373 (Tokushima University Institutional Repository: 116195, DOI: 10.3390/ijerph17207373, PubMed: 33050275)
10.	Takaharu Goto, Takahiro Kishimoto, Yuki Iwawaki, Keiko Fujimoto, Yuichi Ishida, Megumi Watanabe, Kan Nagao and Tetsuo Ichikawa : Reliability of screening methods to diagnose oral dryness and evaluate saliva secretion, Dentistry Journal, Vol.8, No.3, 2020. (Tokushima University Institutional Repository) ● Metadata: 115896 (Link to Publication Site) ● Publication site (DOI): 10.3390/dj8030102 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85092017329 (Tokushima University Institutional Repository: 115896, DOI: 10.3390/dj8030102, Elsevier: Scopus)
11.	Y Nishi, T Nomura, M Murakami, Y Kawai, M Nishimura, H Kondo, Y Ito, A Tsuboi, G Hong, S Kimoto, A Gunji, A Suzuki, G Ohwada, S Minakuchi, Y Sato, T Suzuki, K Kimoto, N Hoshi, M Saita, Y Yoneyama, Y Sato, M Morokuma, J Okazaki, T Maeda, K Nakai, Tetsuo Ichikawa, Kan Nagao, Keiko Fujimoto, H Murata, T Kurogi, K Yoshida, T Hosoi and T Hamada : Effect of denture adhesives on oral moisture: A multicenter randomized controlled trial, Journal of Prosthodontic Research, Vol.64, No.3, 281-288, 2020. (Summary) The purpose of this study was to investigate the effect of denture adhesives on oral moisture in a 10-center parallel randomized clinical trial. Two hundred edentulous subjects wearing complete dentures were allocated into three groups: cream-type adhesive, powder-type adhesive and control groups. The adhesives (and saline solution in the control group) were applied to the mucosal surface of the dentures for 4 days, and baseline data and data after the intervention for eight meals over 4 days were obtained. For the main outcome, oral moisture was measured with a moisture checking device. Secondary outcomes were denture satisfaction, masticatory performance, denture retention, and occlusal force. In addition to between-group and within-group comparisons of oral moisture, investigations for secondary outcomes were undertaken in subgroups classified according to the degree of oral moisture at baseline (normal subgroup and dry mouth subgroup). Intention-to-treat analysis was also performed. Between-group and within-group comparisons of oral moisture showed no significant differences. The cream-type and powder-type denture adhesives were significantly effective in the dry mouth group for denture satisfaction ratings of ability to masticate, stability, retention, and comfort of mandibular dentures (p<0.05). The masticatory performance and retentive force of the dry mouth denture adhesive using groups were significantly improved after intervention (p<0.05). The oral moisture of complete denture wearers was not influenced by the use of denture adhesives. Our findings showed that denture adhesives improved subjective denture satisfaction, masticatory performance, and retention for complete denture patients with oral dryness. (Keyword) Dental Cements / Denture Retention / Denture, Complete / Humans / Mastication / Mouth, Edentulous (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jpor.2019.08.004 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 31501069 ● Summary page in Scopus @ Elsevier: 2-s2.0-85071848752 (DOI: 10.1016/j.jpor.2019.08.004, PubMed: 31501069, Elsevier: Scopus)
12.	窪木拓男, Tetsuo Ichikawa, 馬場一美, 藤澤政紀, 佐藤博信, 會田英紀, 小山重人, 秀島雅之, 佐藤裕二, 和気裕之, 大野彩, Kan Nagao, 上田順加, 玉置勝司, 貞森紳丞, 津賀一弘, 西恭宏, 澤瀬隆, 越野寿, 鱒見進一, 櫻井薫, 石橋寛二, 大山喬史, 赤川安正, 平井敏博, 佐々木啓一, 古谷野潔, 矢谷博文 and 松村英雄 : 治療の難易度を測定するプロトコルの妥当性の検討 ─(公社)日本補綴歯科学会による多施設臨床研究─, Annals of Japan Prosthodontic Society, Vol.11, No.4, 355-375, 2019. (Link to Publication Site) ● Publication site (DOI): 10.2186/ajps.11.355 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390564227333416320 ● Search Scopus @ Elsevier (DOI): 10.2186/ajps.11.355 (DOI: 10.2186/ajps.11.355, CiNii: 1390564227333416320)
13.	G Ohwada, S Minakuchi, Yuji Sato, A Tsuboi, Tetsuo Ichikawa, Kan Nagao and Keiko Fujimoto : Subjective Evaluation of Denture Adhesives: A Multicenter Randomized Controlled Trial., JDR Clinical and Translational Research, Vol.5, No.1, 50-61, 2019. (Summary) Many reports show that denture adhesives improve the retention and stability of dentures. However, few randomized controlled trials have examined the effects of denture adhesives. This 10-center randomized controlled trial with parallel groups involving 200 edentulous patients wearing complete dentures aimed to evaluate the effects of short-term use of cream and powder denture adhesives. Patients were allocated into 2 cream- and powder-type adhesive groups and 1 control group. Intervention groups were treated with the 2 adhesives (1 each), and the control group received saline solution. Adhesive or control was applied to the denture-mucosal surface for 4 d, and data at baseline and after day 4 of intervention (i.e., 8 meals) were obtained. Patient satisfaction was evaluated with a 100-mm visual analog scale. Oral health-related quality of life was measured with the Japanese version of the Oral Health Impact Profile for Edentulous Patients. Perceived chewing ability was evaluated by a questionnaire regarding ease of chewing and swallowing food. Between-group comparisons were performed with Kruskal-Wallis tests with the Mann-Whitney test adjusted by Bonferroni correction. Within-group comparisons of pre- and postintervention measurements were performed with the Wilcoxon signed-rank test. Intention-to-treat analysis was also performed. Between-group comparisons showed no significant differences for general satisfaction or Oral Health Impact Profile for Edentulous Patients. However, significant differences in satisfaction with various denture functions with cream- and powder-type adhesives were seen in pre- and postintervention comparisons ( < 0.05). Significant differences were also observed for perceived chewing ability of hard foods ( < 0.05). These results suggest that although denture adhesives do not invariably improve denture function, they do affect subjective evaluations and possibly chewing of hard foods. Therefore, the effects of denture adhesive use are insufficient to resolve any fundamental dissatisfaction with dentures ( ClinicalTrials.gov NCT01712802 ). The results of this study suggest that denture adhesives should be applied under certain conditions; however, an appropriate diagnosis is important before application. These practice-based data provide information to establish evidence-based guidelines for applying denture adhesives. (Keyword) Dental Cements / Denture Retention / Denture, Complete / Humans / Mouth, Edentulous (Link to Publication Site) ● Publication site (DOI): 10.1177/2380084419837607 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 30975019 ● Search Scopus @ Elsevier (PMID): 30975019 ● Search Scopus @ Elsevier (DOI): 10.1177/2380084419837607 (DOI: 10.1177/2380084419837607, PubMed: 30975019)
14.	Minakuchi Shinsuke, Tsuga Kazuhiro, Ikebe Kazunori, Ueda Takayuki, Tamura Fumiyo, Kan Nagao, Furuya Junichi, Matsuo Koichiro, Yamamoto Ken, Kanazawa Manabu, Watanabe Yutaka, Hirano Hirohiko, Kikutani Takeshi and Sakurai Kaoru : Oral Hypofunction in the Older Population -Position Paper of the Japanese Society of Gerodontology in 2016, Gerodontology, Vol.35, No.4, 317-324, 2018. (Summary) There is growing international interest in identifying the effects of ageing on oral health and on appropriate strategies for managing oral disorders. The Japanese Society of Gerodontology (JSG), as the official representative of researchers and clinicians interested in geriatric dentistry in Japan, makes several recommendations on the concept of "oral hypofunction." This study proposes diagnostic criteria and management strategies to reduce the risk of oral hypofunction among older people. We define oral hypofunction as a presentation of 7 oral signs or symptoms: oral uncleanness; oral dryness; decline in occlusal force; decline in motor function of tongue and lips; decline in tongue pressure; decline in chewing function; and decline in swallowing function. The criteria of each symptom were determined based on the data of previous studies, and oral hypofunction was diagnosed if the criteria for 3 or more signs or symptoms were met. We recommend that more evidence should be gathered from clinical studies and trials to clarify our diagnostic criteria and management strategies. (Keyword) Aged / Bite Force / Deglutition Disorders / Dental Care for Aged / Geriatric Dentistry / Humans / Japan / Mastication / Oral Health / Oral Hygiene / Societies, Dental / Xerostomia (Tokushima University Institutional Repository) ● Metadata: 115111 (Link to Publication Site) ● Publication site (DOI): 10.1111/ger.12347 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 29882364 ● Summary page in Scopus @ Elsevier: 2-s2.0-85056306394 (Tokushima University Institutional Repository: 115111, DOI: 10.1111/ger.12347, PubMed: 29882364, Elsevier: Scopus)
15.	Takuro Baba, Takaharu Goto, Keiko Fujimoto, Hideki Suito, Kazutomo Yagi, Kan Nagao and Tetsuo Ichikawa : Geniohyoid muscle affects directly masticatory function: Evaluation using a decision tree analysis, The International Journal of Prosthodontics, Vol.31, No.6, 569-572, 2018. (Summary) To clarify the effect of geniohyoid (GH) muscle morphology and related function on masticatory ability using a decision-tree analysis. A total of 103 participants were enrolled. A cross-sectional area (CSA) of the GH muscle, neck circumference, body mass index, tongue pressure, jaw opening strength, and masticatory ability score were measured. The CSA of the GH muscle was selected as an independent variable for the first layer of the decision tree, with masticatory score as the dependent variable. These data suggest that the CSA of the GH muscle may have a large impact on the masticatory ability score when evaluating masticatory ability. (Keyword) Body Mass Index / Decision Trees / female / Humans / male / Mastication / Middle Aged / Muscle Strength / Neck Muscles / Pharyngeal Muscles / Pressure / Range of Motion, Articular (Link to Publication Site) ● Publication site (DOI): 10.11607/ijp.5862 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 30408137 ● Summary page in Scopus @ Elsevier: 2-s2.0-85056396663 (DOI: 10.11607/ijp.5862, PubMed: 30408137, Elsevier: Scopus)
16.	Yoshihito Naitou, Hiromichi Yumoto, K Hs Kumar, Takashi Matsuo, Katsuhiko Hirota, Yoichiro Miyake, Kan Nagao, Yoritoki Tomotake, R Jimbo and Tetsuo Ichikawa : Antifungal and Mechanical Properties of Tissue Conditioner Containing Plant-Derived Component, --- An In Vitro Study ---, Journal of Prosthodontics, Vol.27, No.7, 665-669, 2018. (Summary) To evaluate the antifungal activity and mechanical properties of a novel antifungal tissue conditioner containing Juncus powder. Juncus powder was mixed with GC tissue conditioner at concentrations of 2.5%, 5.0%, and 10.0% by mass. The cylindrical specimens of Juncus-mixed tissue conditioner (dimensions: 10 mm in diameter and 2 and 6 mm in height for antimicrobial and mechanical tests, respectively) were prepared. The specimens placed on the bottom of the 24-well tissue culture plate were cultured with Candida albicans CAD1 for 2 and 4 days. The proliferation of the C. albicans in the wells was determined by measuring the optical density of fungal culture, and the surface of the specimens were also observed by scanning electron microscopy (SEM). To assess the mechanical properties of the specimens, the fluidity and hardness of Juncus-mixed tissue conditioner were measured using the methods certified according to ISO 10139-1. Juncus-mixed tissue conditioner significantly exhibited growth inhibitory effect in a Juncus concentration-dependent manner after both 2- and 4- day cultures. SEM observation showed that the amount of C. albicans on Juncus-mixed specimens drastically decreased, and biofilm formation was markedly inhibited. Moreover, both mechanical properties were found to be within the ranges regulated and specified by ISO. These findings demonstrated that the tissue conditioner including Juncus powder has a significant growth inhibitory effect against C. albicans, and it is suggested that the application of Juncus-mixed tissue conditioner may prevent denture stomatitis and oral candidiasis in denture wearers. (Link to Publication Site) ● Publication site (DOI): 10.1111/jopr.12546 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 28901663 ● Search Scopus @ Elsevier (PMID): 28901663 ● Search Scopus @ Elsevier (DOI): 10.1111/jopr.12546 (DOI: 10.1111/jopr.12546, PubMed: 28901663)
17.	Keiko Fujimoto, Tsuyoshi Honda, Hideki Suito, Kan Nagao and Tetsuo Ichikawa : Tongue thickness and its clinical significance, Journal of Oral Health and Biosciences, Vol.31, No.1, 32-38, 2018. (Tokushima University Institutional Repository) ● Metadata: 111934 (Link to Publication Site) ● Publication site (DOI): 10.20738/johb.31.1_32 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.20738/johb.31.1_32 (Tokushima University Institutional Repository: 111934, DOI: 10.20738/johb.31.1_32)
18.	Takuo Kuboki, Tetsuo Ichikawa, Kazuyoshi Baba, Masanori Fujisawa, Hironobu Sato, Hideki Aita, Shigeto Koyama, Masayuki Hideshima, Yuji Sato, Hiroyuki Wake, Aya Kimura-Ono, Kan Nagao, Yorika Kodaira, Katsushi Tamaki, Shinsuke Sadamori, Kazuhiro Tsuga, Yasuhiro Nishi, Takashi Sawase, Hisashi Koshino, Shinichi Masumi, Kaoru Sakurai, Kanji Ishibashi, Takashi Ohyama, Yasumasa Akagawa, Toshihiro Hirai, Keiichi Sasaki, Kiyoshi Koyano, Hirofumi Yatani and Hideo Matsumura : A multi-centered epidemiological study evaluating the validity of the treatment difficulty indices developed by the Japan Prosthodontic Society, Journal of Prosthodontic Research, Vol.62, No.2, 162-170, 2018. (Summary) The Japan Prosthodontic Society developed a multi-axis assessment protocol to evaluate the complex variations in patients who need prosthodontic care, and to classify the level of treatment difficulty. A previous report found the protocol to be sufficiently reliable. The purpose of this multi-center cohort study was to evaluate the validity of this multi-axis assessment protocol. The treatment difficulty was evaluated using the multi-axis assessment protocol before starting prosthodontic treatment. The time required for active prosthodontic treatment, medical resources such as treatment cost, and changes in the oral health-related QOL before and after treatment, were evaluated after treatment completion. The construct validity of this protocol was assessed by the correlation between the dentist's pre-operative subjective assessment of the treatment difficulty, and the level of difficulty determined by this protocol. The predictive validity was assessed estimating the correlations between a "comprehensive level of treatment difficulty" based on the four axes of this protocol and total treatment cost, total treatment time, and changes in the oral health-related QOL before and after treatment. The construct validity of this protocol was well documented except for psychological assessment. Regarding the predictive validity, the comprehensive level of treatment difficulty assessed before treatment was significantly correlated with the three surrogate endpoints known to be related to the treatment difficulty (total treatment cost, treatment time, and improvement in the oral health-related QOL). To further clarify the validity of the protocol according to patients' oral condition, a subgroup analysis by defects was performed. Analyses revealed that treatment difficulty assessment before treatment was significantly related to one or two surrogate endpoints in the fully edentulous patients and the partially edentulous patients. No significant relationship was observed in the patients with mixture of full/partial edentulism and the patients with teeth problems, possibly due to the small sample size in these groups. This study revealed that the multi-axis assessment protocol was sufficiently valid to predict the level of treatment difficulty in prosthodontic care in patients with fully edentulous defects and with partially edentulous defects. (Keyword) Cohort Studies / Forecasting / Humans / Japan / Mouth, Edentulous / Oral Health / Process Assessment (Health Care) / Prosthodontics / Quality of Life / Societies, Dental / Time Factors (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jpor.2017.08.002 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 28916466 ● Summary page in Scopus @ Elsevier: 2-s2.0-85029155171 (DOI: 10.1016/j.jpor.2017.08.002, PubMed: 28916466, Elsevier: Scopus)
19.	Sachie Wada, Takaharu Goto, Keiko Fujimoto, Megumi Watanabe, Kan Nagao, Atsuko Nakamichi and Tetsuo Ichikawa : Changes in food bolus texture during mastication, Journal of Texture Studies, Vol.48, No.2, 171-177, 2017. (Summary) The purpose of this study was to survey the changes that occur in bolus texture from intake to swallowing during the mastication process for four types of food materials and to identify how texture is related to the number of chews. We recruited 15 young Japanese participants for this study. The subjects were asked to spit the food bolus just before swallowing when eating four different foods: cracker, boiled rice, hard gelatine gel, and soft gelatine gel. Three physical properties (hardness, adhesiveness, and cohesiveness) were measured in the bolus after being chewed for 25, 50, 75, 100, and 125% of the normal number of chews. Occlusal force and pressure as well as stimulated whole saliva volume were also measured. Extensive variation in the number of chews existed between subjects, but minimal intra-subject variation was observed. Hardness was observed to decrease, whereas cohesiveness and adhesiveness increased in a chew-dependent manner for the cracker, soft gelatine gel, and hard gelatine gel, but not boiled rice. Bolus texture appears to be largely related to the number of chews. Hardness also tended to be influenced by occlusion. The adhesiveness and hardness of the boiled rice were also greatly influenced by saliva volume and occlusal force, respectively. Hardness is an important rheological factor in food bolus texture and likely plays a significant role in determining the appropriate number of chews. Adhesiveness and cohesiveness appear to be secondary factors in this process. We propose a model of oral processing for application in determining the appropriate number of chews for an individual. Hardness appears to be an important rheological factor in food bolus texture, with adhesiveness and cohesiveness being secondary aspects. When food is hard or difficult to swallow, chewing behavior will likely be more influenced by the perception of bolus texture. (Link to Publication Site) ● Publication site (DOI): 10.1111/jtxs.12228 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 28370114 ● Summary page in Scopus @ Elsevier: 2-s2.0-85016757531 (DOI: 10.1111/jtxs.12228, PubMed: 28370114, Elsevier: Scopus)
20.	Yoshizo Matsuka, Yoshiyuki Hagiwara, Katsushi Tamaki, Hisahiro Takeuchi, Masanori Fujisawa, Takahiro Ono, Yoshihiro Tsukiyama, Kan Nagao, Kazuhiro Tsuga, Hideki Aita, Hisatomo Kondo, Kenji Fueki, Hiroaki Tsukasaki, Keisuke Nishigawa, Shogo Ozawa, Rika Kuwatsuru, Hajime Minakuchi, Toshimitsu Iinuma, Takashi Matsuura, Kanji Ishibashi, Shigehisa Fujii, Toshihiro Hirai, Keiichi Sasaki, Hirofumi Yatani, Yoshimasa Igarashi, Yuji Sato, Tetsuo Ichikawa, Tetsuo Yamamori, Takuo Kuboki, Kazuyoshi Baba, Kiyoshi Koyano, Hironobu Sato and Matsumura Hideo : Reliability and validity of the patient disability-oriented diagnostic nomenclature system for prosthetic dentistry, Journal of Prosthodontic Research, Vol.61, No.1, 20-33, 2017. (Summary) The Japan Prosthodontic Society (JPS) has proposed a new diagnostic nomenclature system (DNS), based on pathogenesis and etiology, to facilitate and improve prosthodontic treatment. This system specifies patient disability and the causative factor (i.e. "B (disability) caused by A (causative factor)"). The purpose of this study was to examine the reliability and validity of this DNS. The JPS Clinical Guideline Committee assessed mock patient charts and formulated disease names using the new DNS. Fifty validators, comprising prosthodontic specialists and dental residents, made diagnoses using the same patient charts. Reliability was evaluated as the consistency of the disease names among the validators, and validity was evaluated using the concordance rate of the disease names with the reference disease names. Krippendorff's α was 0.378 among all validators, 0.370 among prosthodontic specialists, and 0.401 among dental hospital residents. Krippendorff's α for 10 validators (3 specialists and 7 residents) with higher concordance rates was 0.524. Two validators (1 specialist and 1 resident) with the highest concordance rates had a Krippendorff's α of 0.648. Common disease names had higher concordance rates, while uncommon disease names showed lower concordance rates. These rates did not show correlation with clinical experience of the validator or time taken to devise the disease name. High reliability was not found among all validators; however, validators with higher concordance rates showed better reliability. Furthermore, common disease names had higher concordance rates. These findings indicate that the new DNS for prosthodontic dentistry exhibits clinically acceptable reliability and validity. (Tokushima University Institutional Repository) ● Metadata: 111971 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jpor.2016.06.005 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27514568 ● Summary page in Scopus @ Elsevier: 2-s2.0-84994339218 (Tokushima University Institutional Repository: 111971, DOI: 10.1016/j.jpor.2016.06.005, PubMed: 27514568, Elsevier: Scopus)
21.	Takuro Baba, Takaharu Goto, Keiko Fujimoto, Megumi Watanabe, Tsuyoshi Honda, Kazutomo Yagi, Kan Nagao and Tetsuo Ichikawa : Age-related changes in geniohyoid muscle morphology predict reduced swallowing function, Journal of Oral Health and Biosciences, Vol.30, No.1, 18-25, 2017. (Tokushima University Institutional Repository) ● Metadata: 111064 (Link to Publication Site) ● Publication site (DOI): 10.20738/johb.30.1_18 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.20738/johb.30.1_18 (Tokushima University Institutional Repository: 111064, DOI: 10.20738/johb.30.1_18)
22.	Tsuyoshi Honda, Takuro Baba, Keiko Fujimoto, Takaharu Goto, Kan Nagao, Masafumi Harada, Eiichi Honda and Tetsuo Ichikawa : Characterization of Swallowing Sound: Preliminary Investigation of Normal Subjects, PLoS ONE, Vol.11, No.12, e0168187, 2016. (Summary) The purpose of this study was to characterize the swallowing sound and identify the process of sound generation during swallowing in young healthy adults. Thirty-three healthy volunteers were enrolled and allocated into three experimental groups. In experiment 1, a microphone was attached to one of eight cervical sites in 20 subjects, participants swallowed 5 ml water, and the sound waveform was recorded. In experiment 2, 10 subjects swallowed either 0, 5, 10, or 15 ml water during audio recording. In addition, participants consumed the 5 ml bolus in two different cervical postures. In experiment 3, the sound waveform and videofluoroscopy were simultaneously recorded while the three participants consumed 5 ml iopamidol solution. The duration and peak intensity ratio of the waveform were analyzed in all experimental groups. The acoustic analysis of the waveforms and videofluoroscopy suggested that the swallowing sound could be divided into three periods, each associated with a stage of the swallowing movement: the oral phase comprising posterior tongue and hyoid bone movement; the pharyngeal phase comprising larynx movement, hyoid bone elevation, epiglottis closure, and passage of the bolus through the esophagus orifice; and the repositioning phase comprising the return of the hyoid bone and larynx to their resting positions, and reopening of the epiglottis. Acoustic analysis of swallowing sounds and videofluoroscopy suggests that the swallowing sound could be divided into three periods associated with each process of the swallowing movement: the oral phase comprising the posterior movement of the tongue and hyoid bone; the pharyngeal phase comprising the laryngeal movement, hyoid bone elevation, epiglottis closure, and the bolus passage to the esophagus orifice; and the repositioning phase comprising the repositioning of the hyoid bone and larynx, and reopening of the epiglottis. (Tokushima University Institutional Repository) ● Metadata: 111817 (Link to Publication Site) ● Publication site (DOI): 10.1371/journal.pone.0168187 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27959902 ● Summary page in Scopus @ Elsevier: 2-s2.0-85006056335 (Tokushima University Institutional Repository: 111817, DOI: 10.1371/journal.pone.0168187, PubMed: 27959902, Elsevier: Scopus)
23.	Takaharu Goto, Nobuaki Higaki, Kazutomo Yagi, Yuichi Ishida, Megumi Watanabe, Kan Nagao and Tetsuo Ichikawa : An innovative masticatory efficiency test using odor intensity in the mouth as a target marker: a feasibility study, Journal of Oral Rehabilitation, Vol.43, No.12, 883-888, 2016. (Summary) A large number of studies have reported the findings for masticatory efficiency tests; however, some objective masticatory efficiency tests have a drawback, in that subjects are required to spit out the test material. This study examined the possibility of a masticatory efficiency test that evaluates the intensity of odours released when chewing an odour compound-containing material. A total of 20 volunteers were used in this study. The odour intensity in the breath after chewing a gum was measured by portable odour sensor device. The odour intensity after chewing the gum was measured over four chewing durations and at four intervals between spitting out and measurement of the odour intensity. The volume of stimulated saliva was measured by calculating the difference in the weight of the gauze before and after chewing to examine the effect of saliva flow. With an increase in chewing duration, odour intensity reduced. The odour intensity was the highest immediately after chewing. There was a positive correlation between odour intensity and gummy jelly-related masticatory efficiency test value (G-METV), which was significant for 10-s chewing. The regression equation was calculated from three objective variables of odour intensity and G-METV as dependent variable. Pearson's correlation coefficient between G-METV and the odour intensity-related masticatory efficiency value (O-METV) was 0·68. The coefficient of variation of O-METV was significantly lower than that of G-METV. These results suggest that the masticatory performance can be estimated by measuring the odour intensity immediately after chewing food containing odour compounds for 10 s. (Link to Publication Site) ● Publication site (DOI): 10.1111/joor.12444 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27658497 ● Summary page in Scopus @ Elsevier: 2-s2.0-84991648530 (DOI: 10.1111/joor.12444, PubMed: 27658497, Elsevier: Scopus)
24.	Yuichi Ishida, Kumer Kiran, Takaharu Goto, Megumi Watanabe, Wigianto Rudi, Kan Nagao and Tetsuo Ichikawa : Magnet-retained two-mini-implant overdenture: Clinical and mechanical consideration., Dentistry Journal, Vol.4, No.4, 35, 2016. (Summary) Two-implant overdentures have become the accepted treatment for restoring mandibular edentulism. The dimensions of regular implants sometimes limit their use, such as in the case of narrow ridges. Mini-implants with reduced diameters (less than 3.0 mm) enable insertion into narrow ridges. A magnet-retained two-mini-implant overdenture system was developed and is described in this paper. Additionally, we describe a clinical mandibular procedure using the system and evaluate its biomechanical performance. (Tokushima University Institutional Repository) ● Metadata: 111819 (Link to Publication Site) ● Publication site (DOI): 10.3390/dj4040035 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 29563477 ● Search Scopus @ Elsevier (PMID): 29563477 ● Search Scopus @ Elsevier (DOI): 10.3390/dj4040035 (Tokushima University Institutional Repository: 111819, DOI: 10.3390/dj4040035, PubMed: 29563477)
25.	Keiko Fujimoto, Norikazu Minami, Takaharu Goto, Yuichi Ishida, Megumi Watanabe, Kan Nagao and Tetsuo Ichikawa : Hardness, cohesiveness, and adhesiveness of oral moisturizers and denture adhesives: selection criteria for denture wearers., Dentistry Journal, Vol.4, No.4, 34, 2016. (Summary) The mechanical properties of seven denture adhesives and eight oral moisturizers, all of which are commercially available, were evaluated using a texture pro le analysis. A new assessment chart is proposed for the selection criteria of denture adhesive and oral moisturizers using a radar chart with three axes: hardness, cohesiveness, and adhesiveness. (Tokushima University Institutional Repository) ● Metadata: 111818 (Link to Publication Site) ● Publication site (DOI): 10.3390/dj4040034 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 29563476 ● Search Scopus @ Elsevier (PMID): 29563476 ● Search Scopus @ Elsevier (DOI): 10.3390/dj4040034 (Tokushima University Institutional Repository: 111818, DOI: 10.3390/dj4040034, PubMed: 29563476)
26.	松尾浩一郎, 谷口裕重, 中川量晴, 金澤学, 古屋純一, 津賀一弘, 池邉一典, 上田貴之, 田村文誉, Kan Nagao, 山本健, 櫻井薫 and 水口俊介 : 急性期病院入院高齢者における口腔機能低下と低栄養との関連性, Japanese Journal of Gerodontology, Vol.31, No.2, 123-133, 2016. (Keyword) 栄養評価 (Link to Publication Site) ● Publication site (DOI): 10.11259/jsg.31.123 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679309867264 ● Search Scopus @ Elsevier (DOI): 10.11259/jsg.31.123 (DOI: 10.11259/jsg.31.123, CiNii: 1390282679309867264)
27.	Takashi Matsuda, Takaharu Goto, Kosuke Kurahashi, Toshiya Kashiwabara, Megumi Watanabe, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : Digital assessment of preliminary impression accuracy for edentulous jaws: Comparisons of 3-dimensional surfaces between study and working casts, Journal of Prosthodontic Research, Vol.60, No.3, 206-212, 2016. (Summary) The aim of this study was to compare 3-dimensional surfaces of study and working casts for edentulous jaws and to evaluate the accuracy of preliminary impressions with a view to the future application of digital dentistry for edentulous jaws. Forty edentulous volunteers were serially recruited. Nine dentists took preliminary and final impressions in a routine clinical work-up. The study and working casts were digitized using a dental 3-dimensional scanner. The two surface images were superimposed through a least-square algorithm using imaging software and compared qualitatively. Furthermore, the surface of each jaw was divided into 6 sections, and the difference between the 2 images was quantitatively evaluated. Overall inspection showed that the difference around residual ridges was small and that around borders were large. The mean differences in the upper and lower jaws were 0.26mm and 0.45mm, respectively. The maximum values of the differences showed that the upward change mainly occurred in the anterior residual ridge, and the downward change mainly in the posterior border seal, and the labial and buccal vestibules, whereas every border of final impression was shortened in the lower jaw. The accuracy in all areas except the border, which forms the foundation, was estimated to be less than 0.25mm. Using digital technology, we here showed the overall and sectional accuracy of the preliminary impression for edentulous jaws. In our clinic, preliminary impressions have been made using an alginate material while ensuring that the requisite impression area was covered. (Tokushima University Institutional Repository) ● Metadata: 109708 (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jpor.2015.12.007 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 26822762 ● Summary page in Scopus @ Elsevier: 2-s2.0-84957824113 (Tokushima University Institutional Repository: 109708, DOI: 10.1016/j.jpor.2015.12.007, PubMed: 26822762, Elsevier: Scopus)
28.	Tsuyoshi Honda, Keiko Fujimoto, Takuro Baba, Kan Nagao, Akira Takahashi and Tetsuo Ichikawa : Swallowing sound waveform and its clinical significance: Evaluation using ultrasonography, Journal of Oral Health and Biosciences, Vol.28, No.1, 21-27, 2015. (Summary) Background: Cervical auscultation is a technique frequently used for the screening of dysphagia. However, this method is difficult to evaluate objectively and it is unclear how sound is generated during the swallowing process. The aim of this study was to analyze the waveform of swallowing sound and clarify the sound production process using recordings of swallowing sounds and ultrasound images (USI), performed simultaneously.Materials and Methods: Commercial natural spring water and natural carbonated water were used in experiments 1 and 2, respectively. In experiment 1, a microphone was attached to the skin of the neck of 20 young participants and swallowing sounds were recorded and analyzed. In experiment 2, swallowing processes in three participants were recorded by a medical ultrasonography apparatus. The ultrasonic probe was placed on the skin over one of the thyroid cartilages or the thyroid gland.Results: The swallowing sound wave (SSW) was divided into three sectional periods. The mean duration of the first, second, and third SSW was 210 ± 147 ms, 458 ± 113 ms, and 91 ± 61 ms, respectively. The mean intensity ratio of the first, second, and third SSW was 7.8 ± 5.2, 29.2 ± 16.5,and 5.8 ± 5.1, respectively. When the ultrasonic probe was placed on the skin over one of the thyroid cartilages, in the phase between the production of the second SSW and the silent period, the USI revealed an accumulation of swallowed material around the valleculae and oropharynx. In the silent period of the second SSW, the swallowed material accumulated around the hypopharynx. When the ultrasonic probe was placed on the skin over the thyroid gland, in the silent period of the second SSW, the USI revealed that the swallowed material had passed through esophagus.Conclusion: Waveform and USI findings from this study suggest that swallowing sound can be divided into three sectional periods: an oral phase, a pharyngeal phase, and a repositioning phase. (Keyword) Dysphagia / Swallowing sound / Ultrasonography (Tokushima University Institutional Repository) ● Metadata: 109865 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520854805705094272 (Tokushima University Institutional Repository: 109865, CiNii: 1520854805705094272)
29.	Takaharu Goto, Atsuko Nakamichi, Megumi Watanabe, Kan Nagao, Miwa Matsuyama and Tetsuo Ichikawa : Influence of food volume per mouthful on chewing and bolus properties, Physiology & Behavior, Vol.141, 58-62, 2015. (Summary) Behaviors relating to food intake, i.e., speed of chewing, number of chews, and bite size, are important for decreasing energy intake, which might reduce excess body weight and thus metabolic risk. This study aimed at investigating the influence of mouthful volume on the number of chews and food bolus properties in addition to clarifying appropriate eating behaviors related to mouthful volume. Fifteen young Japanese women volunteered to participate. The subjects were asked to spit the food bolus in a glass dish just before swallowing when eating 3 different foods: boiled rice, fish sausage, and peanuts. The 3 physical properties of solidity, adhesiveness, and cohesiveness were measured in the bolus, and the number of chews was noted. The number of chews significantly increased with increasing mouthful volume with all 3 foods; conversely, the number of chews per unit of food weight (g) decreased significantly with boiled rice and fish sausage. Trends were observed for solidity and cohesiveness, which varied with increasing mouthful volumes. Decreased mouthful volume resulted in a greater number of chews per weight of food and more appropriate bolus properties; therefore, a change in mouthful volume could be a useful behavior modification for regulation of energy intake. (Keyword) Eating / Energy Intake / Feeding Behavior / Female / Food / Humans / Mastication / Young Adult (Link to Publication Site) ● Publication site (DOI): 10.1016/j.physbeh.2015.01.007 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 25582518 ● Summary page in Scopus @ Elsevier: 2-s2.0-84921058803 (DOI: 10.1016/j.physbeh.2015.01.007, PubMed: 25582518, Elsevier: Scopus)
30.	Takaharu Goto, Kan Nagao, Yuichi Ishida, Yoritoki Tomotake and Tetsuo Ichikawa : Influence of female attachment installation load on movement and resultant forces in implant overdentures, Journal of Prosthodontics, Vol.24, No.2, 156-163, 2015. (Summary) This in vitro study investigated the effect of attachment installation conditions on the load transfer and denture movements of implant overdentures, and aims to clarify the differences among the three types of attachments, namely ball, Locator, and magnet attachments. Three types of attachments, namely ball, Locator, and magnetic attachments were used. An acrylic resin mandibular edentulous model with two implants placed in the bilateral canine regions and removable overdenture were prepared. The two implants and bilateral molar ridges were connected to three-axis load-cell transducers, and a universal testing machine was used to apply a 50 N vertical force to each site of the occlusal table in the first molar region. The denture movement was measured using a G(2) motion sensor. Three installation conditions, namely, the application of 0, 50, and 100 N loads were used to install each attachment on the denture base. The load transfer and denture movement were then evaluated. The resultant force decreased with increasing installation load for all attachments. In particular, the resultant force on implants on the loading side of the Locator attachment significantly decreased when the installation load was increased from 0 to 50 N, and that for magnetic attachment significantly decreased when the installation load was increased from 50 to 100 N. For the residual ridges on the loading side, the direction of the forces for all attachments changed to downward with increasing installation load. Furthermore, the yaw Euler angle increased with increasing installation load for the magnetic attachment. Subject to the limitations of this study, the use of any installation load greater than 0 N is recommended for the installation of ball and Locator attachments on a denture base. Regarding magnetic attachments, our results also recommend installation on a denture base using any installation load greater than 0 N, and suggest that the resultant force acting on the implant can be decreased by increasing the installation load; however, a large installation load of 100 N should be avoided when installing the attachment on the denture base to avoid increasing the denture movement. (Link to Publication Site) ● Publication site (DOI): 10.1111/jopr.12177 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 24975368 ● Summary page in Scopus @ Elsevier: 2-s2.0-84923081891 (DOI: 10.1111/jopr.12177, PubMed: 24975368, Elsevier: Scopus)
31.	東岡紗知江, 比嘉仁司, Tsuyoshi Honda, Atsuko Nakamichi, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : Considerations on Olfactory Stimulus of <i>Citrus sudachi</i> and Thermo Stimulus to Promote Salivary Secretion, Japanese Journal of Gerodontology, Vol.29, No.1, 3-10, 2014. (Summary) In Japan, a country with an aging population, hyposalivation is becoming a serious problem among the elderly. The purpose of this study was to develop a new method for promoting salivary secretion using the olfactory stimulus of <i>Citrus sudachi</i>, artificial sudachi fragrance, and the combined use of artificial sudachi fragrance with thermo stimulus. Olfactory stimulus of <i>Citrus sudachi</i> is known as a safe stimulus that can stimulate salivary secretion of patients before food intake. However, <i>Citrus sudachi</i> is a seasonal fruit, so its effect was compared to that of artificial sudachi fragrance. The amount of saliva was recorded to evaluate the effect among 94 healthy adult participants who signed an informed consent form approved by the Research Ethics Committee of Tokushima University Hospital (#1283). Since olfactory stimulus easily fades, thermo stimulus was used because it is known to increase salivary secretion continuously. Thus,the effect of artificial sudachi fragrance combined with thermo stimulus using a hot pack on three different parts of the body (eyes, submandibular, chest) was also examined. Changes in salivary secretion was recorded for 1 hour after the stimulation. Results showed that artificial sudachi fragrance increased salivary secretion as much as <i>Citrus sudachi</i>. There was no significant difference between the olfactory stimuli of artificial sudachi fragrance when used alone, and when used in combination with thermo stimulus. However, it was observed that the stimulus which increased salivary secretion the most in 50 minutes was the olfactory stimulus with thermo stimulus on the submandibular. It can therefore be said that the combined use of olfactory stimulus with thermo stimulus is useful when saliva secretion becomes a concern among the elderly, especially at the start of food intake. (Keyword) salivation / thermo stimulus / smell / Citrus sudachi (Link to Publication Site) ● Publication site (DOI): 10.11259/jsg.29.3 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204334751744 ● Search Scopus @ Elsevier (DOI): 10.11259/jsg.29.3 (DOI: 10.11259/jsg.29.3, CiNii: 1390001204334751744)
32.	Kan Nagao, Takaharu Goto, Yuichi Ishida, Tetsuo Ichikawa, M Hideshima, H Koshino, K Hoshiai and Y Umekawa : Should Occlusal Pressure be Applied in Fixing Magnet Assenmlies to Denture? An Evaluation using the Delphi Technique, The Journal of the Japanese Sociaty of Magnetic Applications in Dentistry, Vol.22, No.2, 43-46, 2013.
33.	Takaharu Goto, Yuichi Ishida, Kan Nagao and Tetsuo Ichikawa : Long-term follow-up case reports on the use of magnetic attachment as intracoronal/extracoronal attachments, The Journal of the Japanese Sociaty of Magnetic Applications in Dentistry, Vol.22, No.2, 12-14, 2013.
34.	Toshiya Kashiwabara, Takeyoshi Yoneyama, Atsuko Nakamichi, Tsuyoshi Honda, Sachie Toko, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : In Vitro Efficacy of Electrolyzed Dilute Sodium Hypochlorite Solution on Candidal Biofilm, Japanese Journal of Gerodontology, Vol.28, No.3, 277-283, 2013. (Summary) The effectiveness of oral care interventions for preventing aspiration pneumonia and barriers to compromised elderly is universally-recognized in present medical practice. Quick and effective methods and materials are needed for oral health care. An electrolyzed dilute sodium hypochlorite solution was chosen as a sterilizing solution for oral health care and the sterilizing effect was evaluated using an in vitro candida biofilm. Three electrolyzed functional waters, namely strongly alkaline water, weakly acidic water, dilute sodium hypochlorite solution, two kinds of commercial mouth wash and distilled water were used as test solutions. Antibiofilm efficacy and residual chlorine concentration were evaluated before/after immersing candidal biofilm specimens in each solution. pH changes of the solutions and macroscopic observations of metal surface were evaluated before/after immersing three kinds of dental metals: steel bar, cobalt-chromium alloy and gold-silver-palladium alloy in the solutions to test the corrosion behavior. An electrolyzed dilute sodium hypochlorite solution showed high bactericidal capability of candida biofilm on cell desks and stable concentration of available chlorine, but high induction of metal corrosion. (Keyword) electrolyzed dilute sodium hypochlorite solution / proteolytic / functional water / Candida biofilm / oral health care (Link to Publication Site) ● Publication site (DOI): 10.11259/jsg.28.277 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204333083520 ● Search Scopus @ Elsevier (DOI): 10.11259/jsg.28.277 (DOI: 10.11259/jsg.28.277, CiNii: 1390001204333083520)
35.	Yoshizo Matsuka, 萩原芳幸, 玉置勝司, Hisahiro Takeuchi, 藤澤政紀, 小野高裕, 築山能大, Kan Nagao, 津賀一弘, 會田英紀, 近藤尚知, 笛木賢治, 塚崎弘明, 石橋寛二, 藤井重壽, 平井敏博, 佐々木啓一, 矢谷博文, 五十嵐順正, Yuji Sato, Tetsuo Ichikawa, 松村英雄, 山森徹雄, 窪木拓男, 馬場一美 and 古谷野潔 : Reliability and validity of diagnostic nomenclature system of prosthetic dentistry, Annals of Japan Prosthodontic Society, Vol.5, No.3, 281-290, 2013. (Summary) Purpose: The Japan Prosthodontic Society (a public interest incorporated association) proposed a new diagnostic nomenclature system method that is based on pathogenesis and etiology for providing adequate prosthodontic treatment to patients. This diagnostic nomenclature system is based on "factor" and "disability", and assumes that a disability is caused by a factor. The aim of this study was to analyze the reliability and validity of several dentists' diagnoses on mock patient charts.Methods: The Clinical Guideline Committee of the Japan Prosthodontic Society made mock patient charts and decided the disease name with the new diagnosis system. Fifty evaluators (prosthodontic specialists and hospital residents) answered the disease name with the new diagnosis system. The reliability and validity of the diagnoses were analyzed.Results: Krippendorff's α, which evaluates the reliability, was 0.378 (prosthodontic specialists) and 0.401 (hospital residents). The value was 0.524 with the top 10 evaluators, and 0.628 with the top 2 evaluators. There was no difference between the prosthodontic specialists and hospital residents in the correct answer rate. The correct answer rate for common dental diseases was high and that for uncommon dental diseases was low. Moreover, there was no relation between the correct answer rate and answering time or years of experience.Conclusion: The reliability of the answers among all evaluators was not high, but it was high among the evaluators who showed a high correct answer rate in this study. The correct answer rate for common dental diseases was high and that for uncommon dental diseases was low. (Keyword) Prosthodontic diagnosis / factor / disability / reliability / validity (Link to Publication Site) ● Publication site (DOI): 10.2186/ajps.5.281 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205301084416 ● Search Scopus @ Elsevier (DOI): 10.2186/ajps.5.281 (DOI: 10.2186/ajps.5.281, CiNii: 1390001205301084416)
36.	Takuo Kuboki, Tetsuo Ichikawa, Kazuyoshi Baba, Masayuki Hideshima, Yuji Sato, Hiroyuki Waki, Kan Nagao, Yorika Ueda, Aya Oono, Katsushi Tamaki, Kazuhiro Tsuga, Kaoru Sakurai, Hironobu Sato, Kanji Ishibashi, Hirofumi Yatani, Takashi Oyama, yasumasa Akagawa, Toshihiro Hirai, Keiichi Sasaki and Kiyoshi Koyano : A Multi-Centered Epidemiological Study Evaluating the Reliability of the Treatment Difficulty Indices Developed by the Japan Prosthodontic Sociaty, Annals of Japan Prosthodontic Society, Vol.5, No.2, 224-239, 2013. (Keyword) diagnosis / prosthodontics / quality assurance / treatment outcome / patient risk profile (Link to Publication Site) ● Publication site (DOI): 10.2186/ajps.5.224 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2186/ajps.5.224 (DOI: 10.2186/ajps.5.224)
37.	Takaharu Goto, Hidenobu Nishinaka, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : Main occluding area in partially edentulous patients: changes before and after implant treatment, Journal of Oral Rehabilitation, Vol.39, No.9, 677-683, 2012. (Summary) The 'main occluding area', the location where food crushing occurs during the first stroke of mastication, is reported to be an important concept; however, it is currently limited to findings in individuals with normal dentition. The purpose of this study was to assess the changes in the location, area and bite force of the main occluding area before and after implant treatments. We enrolled 50 partially edentulous and 22 normally dentate subjects. To identify the location of the main occluding area, each subject was instructed to freely bite once on a dental stopping using the partially edentulous side or the normally dentate area. The location, occluding contact area and bite force of the main occluding area before and after the implant treatments were analysed. The main occluding area was located at a reproducible location in the partially edentulous and normally dentate subjects. This location was principally the first molar region, and for the partially edentulous patients with missing teeth in the molar regions, it moved from the premolar region to the first molar region after treatment. The occluding contact area and bite force for the main occluding area increased (P < 0·05) after the implant treatment in the partially edentulous patients with missing teeth in the molar regions. These results suggest that the main occluding area can be restored to the first molar region after implant treatment and may be an important factor in the assessment of prosthodontic treatment. (Keyword) Bite Force / Case-Control Studies / Dental Implants / Denture, Partial / Female / Humans / Jaw, Edentulous, Partially / Male / Mastication / Middle Aged / Treatment Outcome (Link to Publication Site) ● Publication site (DOI): 10.1111/j.1365-2842.2012.02318.x (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 22672204 ● Search Scopus @ Elsevier (PMID): 22672204 ● Search Scopus @ Elsevier (DOI): 10.1111/j.1365-2842.2012.02318.x (DOI: 10.1111/j.1365-2842.2012.02318.x, PubMed: 22672204)
38.	Seiko Hongama, Kan Nagao, Sachie Toko, Kyuma Tanida, Masatake Akutagawa, Yohsuke Kinouchi and Tetsuo Ichikawa : MI sensor-aided screening system for assessing swallowing dysfunction: Application to the repetitive saliva-swallowing test, Journal of Prosthodontic Research, Vol.56, No.1, 53-57, 2012. (Summary) Assessment of swallowing dysfunction, particularly the risk of aspiration, is extremely important to clinicians because it provides crucial information for preventing morbidity and mortality from dysphagia. The purpose of this study was to describe a magneto-impedance sensor-aided screening system (MISS) for assessing swallowing function and clarify its effectiveness with the repetitive saliva-swallowing test (RSST). An MI sensor attached to the skin over the sternum detected the distance from a magnet attached to the skin over the thyroid cartilage during swallowing as the change of magnetic fields. The MISS was validated by videofluoroscopic and videoendoscopic observations. Further, the swallowing behavior of 93 individuals was assessed by using the MISS and then analyzed with the RSST. Swallowing behavior can be recorded and investigated objectively by signal inspection in the MISS compared with the conventional methods. The MISS is a simple and straightforward method for recording and safe because of dry swallow. The MISS system was validated by using simultaneous recordings with videofluoroscopic or videoendoscopic examinations, and compared with the conventional RSST method. The MISS combined with the RSST is an effective screening test for swallowing function. (Keyword) Adult / Aged / Aged, 80 and over / Deglutition / Deglutition Disorders / Electric Impedance / Female / Humans / Magnets / Male / Middle Aged / Prosthodontics / Saliva / Young Adult (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jpor.2011.04.003 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 21646056 ● Search Scopus @ Elsevier (PMID): 21646056 ● Search Scopus @ Elsevier (DOI): 10.1016/j.jpor.2011.04.003 (DOI: 10.1016/j.jpor.2011.04.003, PubMed: 21646056)
39.	Tetsuo Ichikawa, Kan Nagao and Takaharu Goto : Alternative Decision Making Considerations in Prosthodontics, The International Journal of Prosthodontics, Vol.25, No.3, 260-261, 2012. (Keyword) Decision Making / Evidence-Based Dentistry / Humans / Patient Participation / Prosthodontics (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 22545255 ● Search Scopus @ Elsevier (PMID): 22545255 (PubMed: 22545255)
40.	Chen Rong Jian, Yoritoki Tomotake, Megumi Watanabe, Yuichi Ishida, Kan Nagao and Tetsuo Ichikawa : Telescopic Magnetic Attachment for Implant-Supported Denture: Evaluation of Splint Effect, The International Journal of Oral & Maxillofacial Implants, Vol.26, No.3, 657-664, 2011. (Summary) Retrievability, connecting strength, and ease of laboratory work are important but conflicting prerequisites for the success of an implant superstructure, particularly with regard to immediate function. To resolve this issue, a telescopic magnetic attachment system has been developed for implant-supported removable dentures. The splinting effect of the attachment was evaluated for stress distribution and elevation with an in vitro model of three implants in an edentulous mandible. Two types of telescopic magnetic attachments were prepared; the inclination angles of the axial wall of the abutment were 2.5 and 6.0 degrees. Three types of three-unit superstructures--a screw-retained superstructure and two telescopic magnet-retained superstructures--were fabricated. Static loads of 24.5, 49, and 98 N were applied vertically at three loading points on one side of each occlusal table. The elevation was measured as the height at which the magnet-retained superstructure detached from the abutment (on the other side of the prosthesis). In addition, by means of strain gauges, the stress distribution around the implants was evaluated and compared among the superstructures with the same three loads applied at six different points. The magnet-retained superstructure with the axial wall inclined at 2.5 degrees did not detach from the abutment. The differences in stress distribution between the screw-retained and magnet-retained superstructures with a 2.5-degree inclination were found to be statistically insignificant. The magnet-retained superstructure with a 6-degree inclination detached from the abutment, and the stress was concentrated during loading to a cantilever site. Because of its stress distribution and elevation, the new telescopic magnetic attachment, which has properties such as splinting the implants, ease of fabrication, and retrievability, is expected to be a viable alternative for the retention of implant-supported removable dentures. (Keyword) Dental Abutments / Dental Clasps / Dental Implantation, Endosseous / Dental Implants / Dental Models / Dental Prosthesis Design / Dental Prosthesis, Implant-Supported / Dental Stress Analysis / Denture Retention / Humans / Magnetics / Mandible / Materials Testing / Statistics, Nonparametric / Stress, Mechanical / Time Factors (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 21691614 ● Search Scopus @ Elsevier (PMID): 21691614 (PubMed: 21691614)
41.	Toshiya Kashiwabara, Takaharu Goto, Yutaka Sato, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : A new method to prevent the corrosion of dental materials, during disinfection using functional water: Sacrificial protection, Journal of Prosthodontic Research, Vol.54, No.3, 147-149, 2010. (Summary) This paper demonstrates a simple method using sacrificial protection for preventing the corrosion of dental metals. Dental metals are directly connected or/and wound with a pure commercial aluminum/zinc wire/plate with high ionization tendency, before their immersion into oxidizing functional water. Dental materials such as Co-Cr alloy wires, stainless steel, and Au-Ag-Pd alloys did not corrode when this method was used. Thus, this method is very simple and effective for preventing corrosion of dental metals during disinfection using functional water. (Keyword) Corrosion / Dental Alloys / Disinfection / Stainless Steel / Water (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jpor.2010.01.004 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 20189474 ● Search Scopus @ Elsevier (PMID): 20189474 ● Search Scopus @ Elsevier (DOI): 10.1016/j.jpor.2010.01.004 (DOI: 10.1016/j.jpor.2010.01.004, PubMed: 20189474)
42.	Yoritoki Tomotake, Yuichi Ishida, 後藤崇晴, Kan Nagao and Tetsuo Ichikawa : 磁石固定式上部構造におけるインプラント支持歯槽骨の光弾性応力解析, The Journal of the Japanese Society of Magnetic Applications in Dentistry, Vol.19, No.1, 39-46, 2010.
43.	植松宏, 戸原玄, 中島純子, 菊谷武, 高橋浩二, 野原幹司, 前田芳信, 小野高裕, 吉田光由, 大野友久, 佐々木啓一, 高橋裕, 田中貴信, 鈴木哲也, 谷口尚, 小正裕, 岡崎定司, 津賀一弘, 吉川峰加, 西恭宏, 飯沼利光, 川良美佐雄, 皆木省吾, 古屋純一, 小山重人, 木本統, 飯島守雄, 乙丸貴史, 隅田由香, 猪原健, 中根綾子, 若杉葉子, 大内ゆかり, 都島千明, 田村文誉, 尾澤昌悟, 吉岡文, 堀一浩, 城下尚子, 洲脇道弘, 難波謙介, 清水博史, 津江文武, 今井崎太一, 加地彰人, 長岡英一, 佐藤裕二, 高井良招, 赤川安正, 井上農夫男, 服部正己, 森戸光彦, 北川昇, 窪木拓男, 藤澤政紀, 玉置勝司, 築山能大, Kan Nagao, 萩原芳幸, Yoshizo Matsuka, 宮城敦, 重枝昭広 and 中村全宏 : 舌接触補助床(PAP)のガイドライン(案), Japanese Journal of Gerodontology, Vol.24, No.2, 104-116, 2009. (Keyword) 嚥下障害(病因,診断,治療) (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1570291226057286272 (CiNii: 1570291226057286272)
44.	Wei Hau, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : Implant prostheses and adjacent tooth migration: preliminary retrospective survey using 3-dimensional occlusal analysis., The International Journal of Prosthodontics, Vol.21, No.4, 302-304, 2008. (Summary) Occlusal force analysis was retrospectively evaluated to clarify the proximal contact loss after fixed implant prosthesis placement. Twenty-eight patients (55 prostheses) with fixed implant prostheses in the posterior region were divided into 2 groups: proximal contact loss and unchanged groups. The occlusal force and its distribution were 3-dimensionally measured using the Dental Prescale system. A high proportion of lingual and anterior component forces and high occlusal force distribution in the intercanine region were observed in the contact loss group. The high occlusal force of the adjacent tooth may enhance the mesial migration. (Keyword) Bite Force / Dental Prosthesis, Implant-Supported / Dental Stress Analysis / Humans / Malocclusion / Mesial Movement of Teeth / Retrospective Studies (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 18717086 ● Search Scopus @ Elsevier (PMID): 18717086 (PubMed: 18717086)
45.	Toshiya Kashiwabara, Yuka Yoshijima, Seiko Hongama, Kan Nagao, Katsuhiko Hirota and Tetsuo Ichikawa : Denture plaque microflora in geriatric inpatients and maxillary defect patients, Prosthodontic Research & Practice, Vol.6, No.3, 153-158, 2007. (Summary) Purpose: The purpose of this study was to investigate denture plaque microflora of geriatric inpatients and maxillary defect patients from the standpoint of infection control in the elderly.Methods: Denture plaque was collected from 80 elderly subjects who were categorized into 3 groups: group A, 21 healthy complete denture wearers; group B, 49 complete denture wearers residing at a geriatric hospital; and group C, 10 complete denture wearers with maxillary defects. The microflora was investigated by counting the total number of microorganisms, including streptococci, staphylococci, and Candida spp.Results: The colony-forming unit (CFUs) count and incidence, particularly those of Candida spp., were significantly higher in group B (P<0.01). The CFUs of staphylococci were significantly higher in group C (P<0.01), and methicillin-resistant Staphylococcus aureus (MRSA) was observed in all Staphylococcus-positive patients. The CFUs of Candida spp. were significantly correlated to those of staphylococci (P<0.01).Conclusion: A high CFU count of Candida spp. and staphylococci (including MRSA) are characteristic of the microflora in geriatric inpatients and maxillary defect patients, respectively. This study supports the hypothesis that dentures might serve as potential reservoirs of organisms causing systemic infections. (Keyword) denture plaque / microflora / maxillary defects / Candida / MRSA (Link to Publication Site) ● Publication site (DOI): 10.2186/prp.6.153 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680171157888 ● Search Scopus @ Elsevier (DOI): 10.2186/prp.6.153 (DOI: 10.2186/prp.6.153, CiNii: 1390282680171157888)
46.	Kan Nagao, Y. YANO, Tetsuo Ichikawa, Seiko Hongama, H. ICHIBA and T. MANYOSHI : Improvement of Oral Condition of Elderly using Oral Rinse with Benzethonium Chloride, 日本補綴歯科学会雑誌. 特別号, 日本補綴歯科学会学術大会抄録集 = Proceedings of the ... conference, the Japan Prosthodontic Society, Vol.51, No.116, 158, 2007. (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1572261550564513536 (CiNii: 1572261550564513536)
47.	Chen Jianrong, Kan Nagao, Yoritoki Tomotake and Tetsuo Ichikawa : Influence of a Vent Hole on the Retentive Force of a Cement-retained Superstructure before/after Thermocycling, Prosthodontic Research & Practice, Vol.5, No.3, 157-160, 2006. (Summary) <B>Purpose:</B> The purpose of this study was to evaluate the influence of a vent hole on the retentive force of a cement-retained superstructure to an abutment.<BR><B>Methods:</B> The retentive force of superstructures with/without a vent hole, retained using one of two luting cements, was measured using a universal testing machine both before and after thermocycling<BR><B>Results:</B> The retentive force of the cement-retained superstructure with the vent hole was greater than that of the cement-retained superstructure without the vent hole. While the retentive force decreased significantly after thermocycling, the size of the vent hole had little influence on the retentive force.<BR><B>Conclusion:</B> It was concluded that placement of a vent hole in the superstructure is useful, with little adverse effect on the retentive force of the restoration. (Keyword) retentive force / cement-retained superstructure / vent hole / thermocycling (Link to Publication Site) ● Publication site (DOI): 10.2186/prp.5.157 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205195009152 ● Search Scopus @ Elsevier (DOI): 10.2186/prp.5.157 (DOI: 10.2186/prp.5.157, CiNii: 1390001205195009152)
48.	Hua Wei, Yoritoki Tomotake, Kan Nagao, Takafumi Ohguri, Daisuke Nagao and Tetsuo Ichikawa : In vitro Study of Stress Distribution on Additional Posterior Mandibular Implants, Prosthodontic Research & Practice, Vol.3, No.1, 84-91, 2004. (Summary) Purpose : This in vitro study investigated the influence of implant splinting on stress distribution in two experimental implant-bone models.Materials and Methods : Two experimental implant-bone models simulated the original Brånemark model with four implants between the mental foramina and one additional implant placed on each side posterior to the mental foramen. The stress distribution on each implant in the models was examined by applying a static load to the superstructure. Three types of superstructures were studied to determine the effect of additional implants in the posterior region : 1) a metal superstructure supported by all six implants (Full dental arch ; Metal FDA) ; 2) the same type of superstructure made of resin instead of metal (Resin FDA) ; and 3) the metal superstructure supported by four anterior implants, with the conical abutments removed from the two posterior implants (Short dental arch ; Metal SDA).Results : Regardless of the type of superstructure tested, high stress was observed around each loaded implant. The highest stress was concentrated on the distal implants of the FDA compared to the stress on the anterior implants.Conclusion : The elevated stress concentration around the implants found in the present in vitro study is considered to be one of the reasons for the high failure rate of additional posterior mandibular implants. (Keyword) stress distribution / splinting / posterior installation of implant / mandibular distortion (Link to Publication Site) ● Publication site (DOI): 10.2186/prp.3.84 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680171778304 ● Search Scopus @ Elsevier (DOI): 10.2186/prp.3.84 (DOI: 10.2186/prp.3.84, CiNii: 1390282680171778304)
49.	Masatoshi Ishikawa, Tetsuo Ichikawa, Kan Nagao, 真里瀧野 and Miho Fujinum : 上顎全部床義歯の後縁設定に関する一考察, Shikoku Dental Research, Vol.15, No.2, 237-242, 2003.
50.	Kan Nagao, Naoki Kitaoka, Fumiaki Kawano, Junji Komoda and Tetsuo Ichikawa : Influence of Changes in Occlusal Vertical Dimension on Tongue Pressure to Palate during Swallowing, Prosthodontic Research & Practice, Vol.1, No.1, 16-23, 2002. (Summary) Purpose : The purpose of the present study was to examine the relationship of tongue pressure and changes in occlusal vertical dimension to swallowing.Materials and Methods : The volunteer subjects were four young male dentulous adults and eight elderly complete denture wearers. The tongue pressure to the palate was simultaneously recorded with electromyography (EMG) measurements of the suprahyoid muscles as the occlusal vertical dimension changed. The subjects were instructed to perform two actions : swallowing without any liquid or food (dry swallowing) and swallowing of 2 ml water (wet swallowing).Results : During dry swallowing, the maximum pressure decreased significantly as the vertical dimension increased in the young subjects. In the elderly, the maximum tongue pressure decreased monotonically as the vertical occlusion increased. The same results were clearly found for wet swallowing. Overall data suggested that the tongue pressure of the elderly group was lower and the duration of tongue pressure in wet swallowing was longer than that of the younger group.Conclusion : An increase of the vertical dimension decreased the tongue pressure to the palate, whereas a decrease of the vertical dimension affected the tongue pressure less. Tongue pressure is an important factor for the evaluation of tongue function, especially swallowing. (Keyword) Swallowing / Tongue Pressure / Vertical Dimension / Complete Denture (Link to Publication Site) ● Publication site (DOI): 10.2186/prp.1.16 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205194547968 ● Search Scopus @ Elsevier (DOI): 10.2186/prp.1.16 (DOI: 10.2186/prp.1.16, CiNii: 1390001205194547968)
51.	Naoki Omura, Katsuhiko Hirota, Yoko Kanitani, Kan Nagao, Toshiya Kashiwabara and Tetsuo Ichikawa : デンチャープラークと咽頭の微生物叢との関連性, The Journal of the Japan Prosthodontic Society, Vol.46, No.4, 530-538, 2002. (Summary) Purpose: Prevention of an infection, especially aspiration pneumonia, is an important theme in the elderly. We are pointing out risk that is causing an infection such as the aspiration pneumonia, and a denture acts as a reservoir of microorganisms. The aim of this study was to examine the relationship between denture plaque and pharyngeal microflora in the elderly, and the drug susceptibility of isolated <I>Candida</I> spp.<BR>Methods: We collected samples of denture plaque and pharyngeal plaque from elderly patients in a geriatric hospital and Tokushima University Dental Hospital (TUDH). The microflora was investigated by the detection of oral streptococci, staphylococci, <I>Candida</I> spp., <I>Pseudomonas aeruginosa, Escherichia coli</I> and coliforms, and MRSA. Isolated <I>Candida</I> spp. were measured for drug susceptibility.<BR>Results: The microflora of denture plaque was very similar to pharyngeal microflora. A higher incidence of most microorganisms was observed in the patients in TUDH compared with patients in the geriatric hospital. Staphylococci were detected from the patients who harbored <I>Candida</I> spp. All strains of <I>Candida</I> spp. appeared to be susceptible to amphotericin B. Some strains of <I>C. glabrata, C</I>.tropicalis, and <I>C. krusei</I> appeared to be less susceptible to fluconazole. Fluconazole-resistant <I>C. albicans</I> was not isolated.<BR>Conclusions: Denture plaque strongly influences the pharyngeal microflora in the elderly. (Keyword) denture plaque / Candida spp. / aspiration pneumonia / pharynx / drug resistance (Link to Publication Site) ● Publication site (DOI): 10.2186/jjps.46.530 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204413540608 ● Search Scopus @ Elsevier (DOI): 10.2186/jjps.46.530 (DOI: 10.2186/jjps.46.530, CiNii: 1390001204413540608)
52.	Masaru Hada, Yoko Kanitani, Tetsuo Ichikawa, Masatoshi Ishikawa and Kan Nagao : A Study on the Contributing Factors that make Denture Usage Difficult for the Dependent Elderly, Japanese Journal of Gerodontology, Vol.16, No.1, 22-28, 2001. (Summary) It is well known that whether the dependent elderly can use dentures or not depends on the degree of both their physical and mental capacities. However, we have observed several cases where two eldely persons having with similar levels of activities of daily living (ADL), a similar degree of independence in daily living, and a similar degree of dementia, differed significantly in their ability to use dentures properly.<BR>From these cases, it can be hypothesized that the ability of the dependent elderly to use dentures properly depends not only on their actual oral condition and ADL, but also on various events in their lives such as the number of their admissions to the hospital since they started wearing dentures. In other words, the cumulative effect of various major life events influences the usage of dentures by the elderly.<BR>Therefore, we conducted a survey designed to investigate the contributing factors that divide those elderly who wear dentures properly from those who do not .<BR>The study participants were the edentulous individuals (71 in total; 16 males, 55 females. Average age: 85.0±5.9 years) who are residents in a geriatric hospital or in a facility of the health care servicesfor the elderly in Tokushima prefecture .<BR>A survey was conducted on the above participants regarding their use of complete dentures, their ADL, their degree of independence for daily living, their degree of dementia, etc.<BR>The results can be summarized as follows: <BR>1 . The frequency of complete denture usage declined as the participant's levels of ADL, independence and dementia worsened, but this decline did not have any relationship to the times of theiradmissions to the hospital/facility or the numbers of members in their family.<BR>2. It was suggested that, among the elderly who have a dementia and mild to low levels of ADL, their ability to wear/remove dentures and to clean the dentures by themselves relates significantly to the frequency of their denture usage . (Keyword) The dependent elderly / Frequency of denture usage / Activities of Daily Living (ADL) / Oral ADL / Dementia / 要介護高齢者 / 義歯使用率 / 口腔に関連するADL / 痴呆 (Link to Publication Site) ● Publication site (DOI): 10.11259/jsg1987.16.22 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204332476928 ● Search Scopus @ Elsevier (DOI): 10.11259/jsg1987.16.22 (DOI: 10.11259/jsg1987.16.22, CiNii: 1390001204332476928)
53.	Yoko Terada, Katsuhiko Hirota, Toshiya Kashiwabara, Kan Nagao, Yoichiro Miyake and Tetsuo Ichikawa : Identification of Helicobacter Pylori in Denture Plaque of Hospitalized Aged Patients, Dentistry in Japan, Vol.37, 56-58, 2001. (Keyword) Helicobacter Pylori / Denture Plaque / PCR / Oral Microorganism
54.	Naoki Kitaoka, Junji Komoda, Tetsuo Ichikawa, Masatoshi Ishikawa, Kan Nagao, Fumiaki Kawano and Masaru Hada : Observation of Tongue Pressure to Palate at Swallowing, --- Comparison between Young Dentitions and Elderly Complete Denture Wearers ---, The Journal of the Japan Prosthodontic Society, Vol.44, No.3, 379-385, 2000. (Keyword) tongue pressure / swallowing / elderly / denture
55.	Toshiya Kashiwabara, Katsuhiko Hirota, Tetsuo Ichikawa, Yoko Terada, Kan Nagao and Fumiaki Kawano : Efficacy of Electrolyzed Water as Denture Cleanser, --- Influence on in vitro Biofilm of Candida albicans ---, The Journal of the Japan Prosthodontic Society, Vol.43, No.3, 513-517, 1999. (Keyword) Electrolyzeo Water / Candida Albicans / biofilm / Denture Plaque / Denture Cleanser (Link to Publication Site) ● Publication site (DOI): 10.2186/jjps.43.513 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.2186/jjps.43.513 (DOI: 10.2186/jjps.43.513)
56.	寺田容子, Katsuhiko Hirota, Kan Nagao, Toshiya Kashiwabara and Tetsuo Ichikawa : Denture Plaque Control for Prevention of Systemic Infection: Part 1. Identification of Helicobacter pylori in Denture Plaque., The Journal of the Japan Prosthodontic Society, Vol.43, No.1, 100-104, 1999. (Keyword) Helicobacter pylori / Denture Plaque / PCR (Link to Publication Site) ● Publication site (DOI): 10.2186/jjps.43.100 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679386639232 ● Search Scopus @ Elsevier (DOI): 10.2186/jjps.43.100 (DOI: 10.2186/jjps.43.100, CiNii: 1390282679386639232)
57.	野田美幸, Masatoshi Ishikawa, Tetsuo Ichikawa, Hideo Kanitani, Yoritoki Tomotake, Naeko Kawamoto, Kan Nagao, Fumiaki Kawano and Masaru Hada : Influence of Implant Connection on Mandibular Flexure in Jaw Movement, --- Three-dimensional Finite Element Analysis ---, The Journal of the Japan Prosthodontic Society, Vol.42, No.4, 580-585, 1998. (Keyword) mandibular flexure / finite element method / implant / connection
58.	Naoyuki Matsumoto, Kan Nagao and Fumiaki Kawano : A Basic Study on Pressure Distribution of Supporting Structures under Complete Denture, --- Part 4. Influence of Occlusal Scheme on Pressure Distribution under a Denture ---, The Journal of the Japan Prosthodontic Society, Vol.41, No.1, 44-51, 1997. (Keyword) pressure distribution / complete denture / occlusal scheme
59.	Yoritoki Tomotake, Fumiaki Kawano, Kan Nagao, 川端修一, 佐藤修斎, 秋田一郎, 川田雄祥, 猪子寿一 and 松本直之 : Shear Bond Strength of Abrasion-resistant Plastic Teeth to Self-curing Resin, --- Comparison of Bonding Agents ---, Shikoku Dental Research, Vol.9, No.2, 115-122, 1997. (Keyword) 硬質レジン / 即時重合レジン / 結合強さ / プライマー
60.	Fumiaki Kawano, Kan Nagao, Sanshiro Inoue and Naoyuki Matsumoto : Influence of the buccolingual position of artificial posterior teeth on the pressure distribution on the supporting tissue under a complete denture, Journal of Oral Rehabilitation, Vol.23, No.7, 456-463, 1996. (Summary) The buccolingual position of artificial teeth is one of the important factors affecting denture stability, chewing efficiency, and pressure distribution on the supporting tissue under a denture. This study compared the pressure values on the supporting tissue under a denture during chewing in denture wearers, each of whom tried three different setting positions of artificial posterior teeth. The pressure on supporting tissue was greater on the working side that on the non-working side during chewing. The difference in mean pressure was found among the buccolingual positions of artificial posterior teeth. When the posterior teeth were set on the crest, the total pressure was the smallest. This strongly suggests that the setting position of artificial teeth should be considered not only for denture stability but also for the avoidance of high pressure on the supporting structures. (Keyword) Aged / Arachis hypogaea / Bite Force / Denture Design / Denture Retention / Denture, Complete / Food / Humans / Male / Mandible / Mastication / Middle Aged / Movement / Periodontium / Pressure / Surface Properties / Time Factors / Tooth, Artificial / Transducers, Pressure (Link to Publication Site) ● Publication site (DOI): 10.1111/j.1365-2842.1996.tb00879.x (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 8814560 ● Summary page in Scopus @ Elsevier: 2-s2.0-0030185425 (DOI: 10.1111/j.1365-2842.1996.tb00879.x, PubMed: 8814560, Elsevier: Scopus)
61.	Fumiaki Kawano, Kan Nagao, Masazumi Noda, Kenji Oka, Yoritoki Tomotake, Shuichi Kawabata, Naoyuki Matsumoto, Masayuki Kon and Kenzo Asaoka : Shock-absorbing Behavior of Soft Denture Liner, --- Part 2 Influence of Lining Design on Shock Absorbability ---, The Journal of the Japan Prosthodontic Society, Vol.40, No.3, 501-507, 1996. (Keyword) soft denture liner / lining method / acceleration / rising time / free drop test
62.	Sanshiro Inoue, Fumiaki Kawano, Kan Nagao and Naoyuki Matsumoto : An In Vitro Study of the Influence of Occlusal Scheme on the Pressure Distribution of Complete Denture Supporting Tissue, The International Journal of Prosthodontics, Vol.9, No.2, 179-187, 1996.
63.	Fumiaki Kawano, Kan Nagao, Kenji Oka, Yoritoki Tomotake, Masayuki Kon, Kenzo Asaoka and Naoyuki Matsumoto : Studies on Soft Denture Liner by using Viscoelastic Analysis, --- Part 3. Effect of Viscosity of Soft Lining Materials on Stress Distribution in Denture Supporting Structures ---, The Journal of the Japan Prosthodontic Society, Vol.39, No.6, 1004-1009, 1995. (Keyword) viscoelastic finite element method / supporting structure / soft denture liner / viscosity / stress distribution
64.	Sanshiro Inoue, Fumiaki Kawano, Kan Nagao, Kenji Oka, Yoritoki Tomotake and Naoyuki Matsumoto : A Basic Study on Pressure Distribution of Supporting Structures under Complete Denture, --- Part 3. Influence of Occlusal Surface of Artificial Posterior Teeth on Pressure Distribution ---, The Journal of the Japan Prosthodontic Society, Vol.39, No.3, 501-510, 1995. (Keyword) pressure distribution / complete denture / posterior artificial teeth / occlusal surface
65.	Fumiaki Kawano, Kan Nagao, Sanshiro Inoue, Masayuki Kon, Kenzo Asaoka and Naoyuki Matsumoto : Studies on Soft Denture Liner by using Viscoelastic Analysis, --- Part 2. Effect of Lining Method of Denture Liner on Stress Distribution in Supporting Structures ---, The Journal of the Japan Prosthodontic Society, Vol.38, No.6, 1328-1335, 1994. (Keyword) viscoelastic finite element analysis / supporting structure / soft denture liner / lining method / stress distribution
66.	Kan Nagao, Fumiaki Kawano and Naoyuki Matsumoto : A Basic Study on Pressure Distribution of Supporting Structures under Complete Denture, --- Part 2. The Influence of the Inclination of Incisal Guide Plate of Semi-adjustable Articulator on Pressure Distribution ---, The Journal of the Japan Prosthodontic Society, Vol.38, No.5, 1025-1035, 1994. (Keyword) complete denture / pressure distribution / 側方ウイング角 / semi-adjustable articulator / insisal guide plate
67.	Fumiaki Kawano, Kan Nagao, Masazumi Noda, Naoyuki Matsumoto, Masayuki Kon and Kenzo Asaoka : Shock-absorbing Behavior of Soft Denture Liner, --- Part 1 Plate Specimens ---, The Journal of the Japan Prosthodontic Society, Vol.37, No.6, 1172-1179, 1993. (Keyword) soft denture liner / shock absorbability / drop-ball test
68.	Fumiaki Kawano, Kenzo Asaoka, Kan Nagao, Nozomu Tada and Naoyuki Matsumoto : Studies on Soft Denture Liner by using Viscoelastic Analysis, --- Part 1 Effect of Soft Denture Liner on Stress Distribution in Supporting Structures ---, The Journal of the Japan Prosthodontic Society, Vol.36, No.6, 1305-1311, 1992. (Keyword) viscoelastic finite element / supporting structure / soft denture liner / stress distribution
69.	Fumiaki Kawano, Kenzo Asaoka, Kan Nagao, Nozomu Tada and Naoyuki Matsumoto : Viscoelastic Analysis of the Supporting Structures under Denture, --- Part 1 Effect of the Artificial Teeth Arrangment on the Stress Distributions in the Supporting Structures ---, The Journal of the Japan Prosthodontic Society, Vol.36, No.6, 1186-1192, 1992. (Keyword) viscoelastic finite element analysis / tooth arrangement / stress distribution / supporting structure
70.	Fumiaki Kawano, Nozomu Tada, Kan Nagao and Naoyuki Matsumoto : The influence of soft lining materials on pressure distribution, The Journal of Prosthetic Dentistry, Vol.65, No.4, 567-576, 1991.
71.	Naoyuki Matsumoto, Fumiaki Kawano, Atsushi Kawamura, Kan Nagao and Kenji Hiranuma : A Guideline for Incisal Table Adjustment of Semi-adjustable Articulator LL-85R, --- Part 2. The Adjustment of Incisal Table ---, The Journal of the Japan Prosthodontic Society, Vol.35, No.1, 51-57, 1991. (Keyword) semi-adjustable articulator / combinated occlusal force / incisal table / lateral wing
72.	Fumiaki Kawano, Kan Nagao, Nozomu Tada, Masaru Hada and Naoyuki Matsumoto : Stress Distribution of Supporting Tissues Under Denture, --- Application of Viisco-elastic Analysis in Prosthetic Field ---, The Journal of the Japan Prosthodontic Society, Vol.34, No.3, 623-630, 1990. (Keyword) stress relaxation / supporting structure / viscoelastic finite element method
73.	Fumiaki Kawano, Kenzo Asaoka, Kan Nagao and Naoyuki Matsumoto : Effect of viscoelastic deformation of soft tissue on stresses in the structures under complete denture, Dental Materials Journal, Vol.9, No.1, 70-79, 1990. (Keyword) Soft tissue / Finite element stress analysis / Viscoelastic deformation
74.	Fumiaki Kawano, Kan Nagao, Nozomu Tada, Masaru Hada and Naoyuki Matsumoto : A Basic Study on Pressure Distribution of Supporting Structures under Complete Denture, --- Part 1. Application of Pressure Dispersion Analyzing System by using Impedance ---, The Journal of the Japan Prosthodontic Society, Vol.34, No.1, 68-76, 1990. (Keyword) impedance grid pressure sensor / pressure distribution / simulator / supporting bone

Review, Commentary:

1.	Keiko Fujimoto, Hideki Suito, Kan Nagao and Tetsuo Ichikawa : Validity of Quantitative and Qualitative Assessments of Skeletal Muscles in the Lower Extremities Using Ultrasound Imaging: A Literature Review, Journal of Oral Health and Biosciences, Vol.36, No.2, 30-35, 2024.
2.	上田貴之, 水口俊介, 津賀一弘, 池邉一典, 田村文誉, Kan Nagao, 古屋純一, 松尾浩一郎, 山本健, 金沢学 and 櫻井薫 : 口腔機能低下症の検査と診断, Japanese Journal of Gerodontology, Vol.33, No.3, 299-303, Dec. 2018.
3.	Kan Nagao : 咀嚼機能低下老年歯科セミナー ``口腔機能低下症''って何?, DENTAL DIAMOND, Vol.45, No.2, 64-65, Apr. 2017.
4.	Kan Nagao : 歯科医から見た摂食嚥下障害へのアプローチ, BRAIN NURSING, Vol.31, No.12, 51-53, Dec. 2015.
5.	Takaharu Goto, 岩脇有軌, Megumi Watanabe, Kan Nagao and Tetsuo Ichikawa : Personal Identification in Dental Prostheses: A Review of the Literature, Journal of Oral Health and Biosciences, Vol.27, No.2, 21-27, Feb. 2015. (Summary) In disasters such as hydraulic bore, earthquakes and fire, the oral structure including the dental prostheses can provide identifying information. Over the years, many different personal identification system of dental prostheses have been reported. This present study analyzes the published literature offering the description of the personal identification system of dental prostheses.Two databases, "PubMed" and "Japana Centra Revuo Medicina" were searched to retrieve research papers referred to the personal identification system of dental prostheses. Twenty four papers were selected from the database with the criteria, and they were reviewed. This literature search showed that the personal identifications in three kinds of dental prostheses: removable denture, crown and implant were reported; and more papers on removable dentures were extracted compared to the crown and implant, however there is no high quality paper indicating that the structured methods for personal identification of dental prostheses is effective. A new method and common write format for personal identification are required to improve the present problems, and our systems using fluorescent material and ultraviolet light and femtosecond pulse laser-oriented recording system would be effective. (Keyword) 大規模災害 / 個人識別 / 補綴装置 (Tokushima University Institutional Repository) ● Metadata: 109855 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050282812441731072 (Tokushima University Institutional Repository: 109855, CiNii: 1050282812441731072)
6.	津村希望, 石田修, Kan Nagao and Tetsuo Ichikawa : 基本的な歯科技工の``勘どころ'' -臨床例から得られた具体的アドバイスをとおして熟練歯科技工士から新人歯科技工士への技術の継承を図る, The International Journal of Dental Technology, Vol.42, No.12, 14061415, Dec. 2014.
7.	Kouhei Kamoi, Kan Nagao, Yuji Shimizu and Tetsuo Ichikawa : 基本的な歯科技工の``勘どころ'' -臨床例から得られた具体的アドバイスをとおして熟練歯科技工士から新人歯科技工士への技術の継承を図る, The International Journal of Dental Technology, Vol.42, No.11, 1444-1253, Nov. 2014.
8.	Kan Nagao, Takaharu Goto, Yuichi Ishida and Tetsuo Ichikawa : 磁性アタッチメントの診療ガイドライン策定デルファイ法とは, The Journal of the Japanese Society of Magnetic Applications in Dentistry, Vol.21, No.1, 32-36, Dec. 2012.
9.	東光紗知江, Seiko Hongama, 本田剛, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : 口腔ケアと歯科医療デバイス, Shikoku Dental Research, Vol.24, No.2, 35-37, Jan. 2012. (Tokushima University Institutional Repository) ● Metadata: 109813 (Tokushima University Institutional Repository: 109813)
10.	東岡紗知江, Kan Nagao and Tetsuo Ichikawa : 【クラウンブリッジ・インプラント・デンチャー補綴臨床のトラブルシューティング】 (Part3)デンチャー編 (Chapter2)義歯のセルフケア, Practice in Prosthodontics, 188-189, May 2011.
11.	Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 【クラウンブリッジ・インプラント・デンチャー補綴臨床のトラブルシューティング】 (Part3)デンチャー編 (Chapter2)装着時のトラブル義歯装着による嘔吐反射, Practice in Prosthodontics, 134-135, May 2011.
12.	Masayo Okajima, Kan Nagao and Tetsuo Ichikawa : 知っておきたい「力」のこと気づく・伝える・守る, デンタルハイジーン別冊, 116-117, Jun. 2010.
13.	Tetsuo Ichikawa, Seiko Hongama and Kan Nagao : 全部床義歯による無歯顎補綴治療発音と嚥下機能から全部床義歯を語る, Practice in Prosthodontics, Vol.38, No.5, 532-539, Jul. 2006.
14.	Kan Nagao, Fumiaki Kawano and Tetsuo Ichikawa : Selection of Occlusal Scheme for Complete Dentures, The Journal of the Japan Prosthodontic Society, Vol.49, No.1, 4-6, Feb. 2005. (Keyword) Dental Occlusion / Denture Design / Denture, Complete / Humans / Jaw, Edentulous / Mastication (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 15844265 ● Search Scopus @ Elsevier (PMID): 15844265 (PubMed: 15844265)
15.	Kan Nagao, Fumiaki Kawano and Tetsuo Ichikawa : Selection of Occlusal Scheme on the Basis of Pressure Distribution on Supporting Structures under Complete Denture, The Journal of the Japan Prosthodontic Society, Vol.48, No.5, 673-680, Dec. 2004. (Summary) In case of making complete dentures, we have to consider not only denture stability but also the restoration of aesthetics and function such as mastication and speech. However these are contradictory theoretically from the point of view of denture stability, and it is very difficult to satisfy both requirements in the case of a patient who has poor upper and lower alveolar ridges. We investigated the effect of artificial posterior teeth form and occlusal scheme on the distribution of pressure on supporting structures under complete dentures during mastication with upper and lower edentulous simulators. In this report, a guideline for the selection of occlusal scheme for complete dentures, based on our previous investigations, is described. The occlusal scheme remarkably affected the distribution of pressure under simulated complete dentures, as shown by comparing the distribution of pressure using two different occlusal schemes:fully balanced occlusion and lingualized occlusion. However other factors such as posterior teeth form and position affect the distribution of pressure as well, and are related to each other. Therefore, not only occlusal scheme but also posterior artificial teeth form has to be considered, and the form of posterior teeth should be carefully and comprehensively decided when making complete dentures. (Keyword) pressure distribution / complete denture / occlusal scheme / posterior teeth form (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 15818000 ● Search Scopus @ Elsevier (PMID): 15818000 (PubMed: 15818000)
16.	Naoyuki Matsumoto, Fumiaki Kawano, Kan Nagao and Tetsuo Ichikawa : Consideration of the Selection of the Artificial Posterior Teeth on the Basis of Pressure Distribution under a Denture, Quintessence of Dental Technology, Vol.23, No.9, 17(1129)-26(1138), Sep. 1998. (Keyword) フルデンチャー / 臼歯部人工歯 / 咬合様式 / 負担圧分布
17.	Naoyuki Matsumoto, Fumiaki Kawano, Kan Nagao and Nozomu Tada : A Guideline for Selection of the Artificial Posterior Teeth, --- Consideration of the Basis of the in vitro Study ---, The Journal of the Japan Prosthodontic Society, Vol.41, No.2, 335-346, Apr. 1997. (Keyword) selection of the posterior teeth / pressure distribution / complete denture / occlusal scheme / occlusal form

Proceeding of International Conference:

1.	Takaharu Goto, Tsukasa Hihara, Keiko Fujimoto, Kan Nagao and Tetsuo Ichikawa : Sex difference of clinical cascade from oral hypofunction to physical frailty, The 7th Biennial Joint Congress of KAP-CPS-JPS, Mar. 2019.
2.	Takaharu Goto, Tsukasa Hihara, Tagami Yoshihiro, Yuki Iwawaki, Kan Nagao and Tetsuo Ichikawa : Investigation with questionnaires on symptoms of physical frailty and eating behaviors, 11th Biennial Congress of Asian Academy of Prosthodontics, Kuala Lumpur, Malaysia, Sep. 2018.
3.	Tetsuo Ichikawa, Takaharu Goto, Tsukasa Hihara, Tagami Yoshihiro and Kan Nagao : A quantitative evaluation of oral frailty-physical frailty relationship model based on covariance structure analysis, 11th Biennial Congress of Asian Academy of Prosthodontics, Kuala Lumpur, Malaysia, Sep. 2018.
4.	Takaharu Goto, Hihara Tsukasa, Kishimoto Takahiro, Takashi Matsuda, Yuki Iwawaki, Kan Nagao and Tetsuo Ichikawa : Investigation with questionnaires on symptoms of oral frailty and eating behaviors: Importance of chewing, Biennial Joint Congress of JPS-CPS-KAP, Wenzhou, China, Oct. 2017.
5.	Takashi Matsuda, Kurahashi Kosuke, Ishida Yuichi, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : Part-digitizing system for complete denture fabrication using digital impression and specialized CAD/CAM tray, The 17th Biennial Meeting of International College of Prosthodontists, Santiago, Chile, Sep. 2017.
6.	Takaharu Goto, Yoritoki Tomotake, Yuichi Ishida, Nobuaki Higaki, Kan Nagao and Tetsuo Ichikawa : Functional Significance of the Main Occluding Area for Partially Edentulous, 16th Biennial Meeting of International College of Prosthodontists, Sep. 2015.
7.	Nobuaki Higaki, Takaharu Goto, Yuki Iwawaki, Kan Nagao and Tetsuo Ichikawa : Brain Function on Modulation of Occlusal Force and Sensory Integration, 16th Biennial Meeting of International College of Prosthodontists, Sep. 2015.
8.	Shiori Nakamura, Nobuaki Higaki, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : Effect analysis of oral stimulation to prevent dementia focusing on the individual sensibility, 16th Biennial Meeting of International College of Prosthodontists, Sep. 2015.
9.	Takashi Matsuda, Takaharu Goto, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : Possibility of Complete Denture Fabrication using Digital Technology: the possibility of Contactless Digital Preliminary Impression, The 3rd ASEAN plus and TOKUSHIMA Joint International Conference on ``Strategic Achievement of Oral Sciences and Promotion of Quality of Life'', Makassar, Dec. 2014.
10.	Nobuaki Higaki, Takaharu Goto, Yuichi Ishida, Kan Nagao and Tetsuo Ichikawa : Effects of vibratory and gustatory stimulations on cerebral blood flows, The 3rd ASEAN plus and TOKUSHIMA Joint International Conference ``Strategic Achievement of Oral Sciences and Promotion of Quality of Life'', Makassar, Dec. 2014.
11.	Takaharu Goto, Yoritoki Tomotake, Yuichi Ishida, Nobuaki Higaki, Kan Nagao and Tetsuo Ichikawa : Clinical significance of the main occluding in prosthodontic treatment, The 3rd ASEAN plus and TOKUSHIMA Joint International Conference on ``Strategic Achievement of Oral Sciences and Promotion of Quality of Life'', Makassar, Dec. 2014.
12.	Tsuyoshi Honda, Keiko Fujimoto, Takuro Baba, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : Elucidation of swallowing Sound Production Mechanism Using Ultrasonography, Indonesian and Japan Prosthodontic Society JOINT MEETING, Bali, Nov. 2014.
13.	Takashi Matsuda, Tetsuo Ichikawa, Takaharu Goto, Toshiya Kashiwabara and Kan Nagao : Digital preliminary impression for complete denture fabrication, Indonesia Japan Prosthodontic Society JOINT MEETING, Bali, Oct. 2014.
14.	Kan Nagao, Takaharu Goto and Tetsuo Ichikawa : Which is better for complete denture wearers, fully balanced occlusion or lingualized occlusion, Indonesian and Japan Prosthodontic Society JOINT MEETING, Bali, Oct. 2014.
15.	Takaharu Goto, Yuichi Ishida, Megumi Watanabe, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : Location of the main occluding area after implant treatment, 38th Annual Conference of The European Prosthodontic Association, Istanbul, Sep. 2014.
16.	Sachie Toko, Tetsuo Ichikawa, Atsuko Nakamichi, Tsuyoshi Honda and Kan Nagao : Properties of Food Bolus for Assessing Quality of Mastication, 38th Annual Conference of The European Prosthodontic Association, Istanbul, Sep. 2014.
17.	Takaharu Goto, Atsuko Nakamichi, Sachie Toko, Tsuyoshi Honda, Kan Nagao and Tetsuo Ichikawa : Assessments of Quality of mastication: Relationship between overall eating behavior and mastication, The 15th Biennial Meeting of International College of prosthodontics, Turin, Sep. 2013.
18.	Nobuaki Higaki, Takaharu Goto, Yuki Iwawaki, Kan Nagao and Tetsuo Ichikawa : Efficiency of oral stimulations on brain function activities: Evaluations using wearable near-infrared spectroscopy, The 15th Biennial Meeting of International College of prosthodontics, Turin, Sep. 2013.
19.	Takaharu Goto, Nobuaki Higaki, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : Sensation of osseointegrated implants: literature review and new neurophysiological approach, ASEAN plus and TOKUSHIMA Joint International Conference"Strategic Achievement of Oral Sciences and Promotion of Quality of Life", Dec. 2012.
20.	Takashi Matsuda, Takaharu Goto, Yuichi Ishida, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : A Trial of Complete Denture Fabrication using Digital Technology: in vitro Evaluation of digital impression, ASEAN plus and TOKUSHIMA Joint International Conference"Strategic Achievement of Oral Sciences and Promotion of Quality of Life", Yogyakarta, Dec. 2012.
21.	Sachie Toko, Hitoshi Higa, Tsuyoshi Honda, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : Changes in the physical properties of food bolus and mandibular movement during mastication, ASEAN plus and TOKUSHIMA Joint International Conference on "Strategic Achievement of Oral Sciences and Promotion of Quality of Life", Yogyakarta, Dec. 2012.
22.	Takaharu Goto, Takashi Matsuda, Yuichi Ishida, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : Digital dentistry in complete denture fabrication, --- Feasibility study ---, International Symposium on Oral Health Education and Research, Balikpapan, Dec. 2011.
23.	Yuki Iwawaki, Yoshihito Naitou, Li Jing, Kan Nagao and Tetsuo Ichikawa : The long-term change in properties of the anti-microbiological tissue conditioner containing Juncus powder, The 7th Biennial Meeting of AAP, Shanghai, Oct. 2011.
24.	Takaharu Goto, Kan Nagao, Yuichi Ishida, Yoritoki Tomotake and Tetsuo Ichikawa : Influence of Attachments On Load Transfer in Implant Overdentures: Effect Of Denture Rigidity, 14th Meeting of International College of Prosthodontists, Hawaii, Sep. 2011.
25.	Takaharu Goto, Kan Nagao, Yuichi Ishida, Yoshihito Naitou, Yoritoki Tomotake and Tetsuo Ichikawa : Observation of the Main ccluding Area with Partually bentate, changes before/after Prosthetic Treatments., 6th Scientific Meeting Asian Academy of Osseointegration, Seoul, Nov. 2010.
26.	Takaharu Goto, Kan Nagao, Yuichi Ishida, Yoshihito Naitou, Megumi Watanabe, Yoritoki Tomotake and Tetsuo Ichikawa : Influence of Attachments on Load Transfer in Implant Overdentures, 19th Annual Scientific Meeting European Assocoation for Osseintegration, Glasgow, Oct. 2010.
27.	Fumiaki Kawano, Kan Nagao, Takao Hanawa, Masayuki Kon, Kenzo Asaoka, A Koran and Naoyuki Matsumoto : Shock-absorbing behavior of soft liners as influenced by accelerated aging, Journal of Dental Research, Vol.75, No.Spec, 308, San Francisco, Mar. 1996.
28.	Fumiaki Kawano, Kan Nagao, Masayuki Kon, Kenzo Asaoka, Naoyuki Matsumoto and A Koran : Cushioning effect of soft liners as influenced by lining method, Journal of Dental Research, Vol.74, No.Spec, 487, Singapore, Jun. 1995.

Proceeding of Domestic Conference:

1.	OKU Yuri, Hideki Suito, Keiko Fujimoto, Kan Nagao and Tetsuo Ichikawa : 歯科診療に起因する歯科医師の職業性・騒音性難聴を予防する, 公益社団法人日本補綴歯科学会第133回学術大会, Jul. 2024.
2.	Takashi Matsuda, Takaharu Goto, Takahiro Kishimoto, Kan Nagao, Tetsuo Ichikawa and Masayo Okajima : 全部床義歯形状の口腔内スキャナによるデジタル化:顎堤形態とスキャンパスの影響, 日本補綴歯科学会第133回学術大会, Jul. 2024.
3.	Keiko Fujimoto, OKU Yuri, Hideki Suito, Kan Nagao and Tetsuo Ichikawa : 咀嚼能力における主観的評価と客観的評価の相違を食行動とフレイルから検討する, 一般社団法人日本老年歯科医学会第35回学術大会, Jun. 2024.
4.	OKU Yuri, Keiko Fujimoto, Hideki Suito and Kan Nagao : 超音波診断装置を用いた舌骨上筋群の評価と口腔機能・嚥下機能との関連, 第29回日本摂食嚥下リハビリテーション学会学術大会, Sep. 2023.
5.	Kan Nagao, Keiko Fujimoto, Hideki Suito, Takaharu Goto, Tetsuo Ichikawa and Megumi Watanabe : 嚥下機能を考慮した全部床義歯口蓋形態の形成, 日本老年歯科医学会第34回学術大会, Jun. 2023.
6.	Hideki Suito, Naoki Maeda, Ryosuke Kasai, 富永賢, Masafumi Amano, Norikazu Minami, Keiko Fujimoto, Kan Nagao, Tetsuo Ichikawa and Hidehiko Hosoki : 異なる材料による歯冠補綴物のアーチファクト定量評価, 日本歯科放射線学会第63回学術大会, May 2023.
7.	Yuki Iwawaki, 園井厚憲, 千葉厚子, 半田拓弥, 中津晋, Takaharu Goto, Keiko Fujimoto, Takahiro Kishimoto, Takashi Matsuda, Hideki Suito, HARUNA Konishi, Kan Nagao and Tetsuo Ichikawa : Efficacy of foam type denture cleanser OC441 on partial denture cleaning, 日本補綴歯科学会第132回学術大会, May 2023.
8.	Keiko Fujimoto, Hideki Suito, Kan Nagao, Tetsuo Ichikawa and Syusai Sato : 歯科医師の診療および技工における感染意識の変化 COVID-19蔓延の影響, (公社)日本補綴歯科学会第131回学術大会, Jul. 2022.
9.	田上義弘, Keiko Fujimoto, Hideki Suito, Takahiro Kishimoto, Yuki Iwawaki, Takaharu Goto, Megumi Watanabe, Kan Nagao and Tetsuo Ichikawa : 舌超音波画像の輝度は，身体的フレイルと関係する, 一般社団法人日本老年歯科医学会第33回学術大会, Jun. 2022.
10.	田上義弘, 藤本けい子, 水頭英樹, 岸本卓大, Yuki Iwawaki, Takaharu Goto, 渡邉恵, Kan Nagao and Tetsuo Ichikawa : 舌超音波画像の輝度は身体的フレイルと関係する, 日本老年歯科医学会第33回学術大会, Jun. 2022.
11.	Kan Nagao, Keiko Fujimoto, Takaharu Goto and Tetsuo Ichikawa : 2種類の硬さの粘膜調整材を用いて舌接触補助床の口蓋形成を行った症例, 日本老年歯科医学会第32回学術大会, Jun. 2021.
12.	Kohsuke Yanazawa, Kan Nagao, Keiko Fujimoto, Yoshihiro Tagami, Megumi Watanabe and Tetsuo Ichikawa : 舌接触補助床の口蓋形成方法の確立, 四国歯学会第57回例会, Mar. 2021.
13.	Yuki Iwawaki, Takaharu Goto, Takahiro Kishimoto, Takashi Matsuda, Keiko Fujimoto, Kan Nagao, 吉村賢治, 江下義之, 矢納義高 and Tetsuo Ichikawa : イソデシルガラクトシド配合泡沫状製剤の高齢者における有効性の評価, 一般社団法人日本老年歯科医学会第31回学術大会, Nov. 2020.
14.	Keiko Fujimoto, Takaharu Goto, Takahiro Kishimoto, Yuki Iwawaki, 水頭英樹, Kan Nagao and Tetsuo Ichikawa : ルシフェラーゼアッセイによる口腔不潔の定量評価, 一般社団法人日本老年歯科医学会第31回学術大会, Nov. 2020.
15.	Yoshihiro Tagami, Takaharu Goto, Keiko Fujimoto, Kan Nagao and Tetsuo Ichikawa : 超音波画像における輝度を用いた舌筋の評価, 令和2年度公益社団法人日本補綴歯科学会中国四国支部学術大会, Aug. 2020.
16.	Kan Nagao and Tetsuo Ichikawa : 舌接触補助床と機能訓練で脳梗塞患者の口腔機能を回復した症例, 日本補綴歯科学会第129回学術大会, Jun. 2020.
17.	Hideki Suito, Keiko Fujimoto, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : 歯科材料研磨時の微粒子の飛散測定:口腔外バキュームの有効性の検討, 令和2年度公益社団法人日本補綴歯科学会第129回学術大会, Jun. 2020.
18.	岡本元太, Lipei Liu, Megumi Watanabe, Kan Nagao and Tetsuo Ichikawa : 歯科用金属が細胞に与える影響, 徳島県歯科医学大会, Feb. 2020.
19.	Yoshihiro Tagami, Takaharu Goto, Keiko Fujimoto, Yuki Iwawaki, 石田雄一, Kan Nagao and Tetsuo Ichikawa : フレイル評価における音声評価の意義, 令和元年度公益社団法人日本補綴歯科学会中国四国支部学術大会, Sep. 2019.
20.	Hideki Suito, 田上義弘, Keiko Fujimoto, Kan Nagao and Tetsuo Ichikawa : 介護老人福祉施設における誤嚥性肺炎発症と歯科的状況の関連, 2019年度公益社団法人日本補綴歯科学会中国・四国支部学術大会, Aug. 2019.
21.	Tetsuo Ichikawa, Takaharu Goto, Takashi Matsuda, Keiko Fujimoto, Kan Nagao and Yasuhiko Shirayama : 地域の看取りと口腔健康管理:限界集落で口腔健康管理はされているか, 令和元年度一般社団法人日本老年歯科医学会第30回学術大会, Jun. 2019.
22.	Takahiro Kurabayashi, Kan Nagao, Keiko Fujimoto, Megumi Watanabe, Takaharu Goto and Tetsuo Ichikawa : 高齢者歯科関連キーワードの変遷 ―学術論文検索とインターネット検索による調査―, 四国歯学会第54回例会, Mar. 2019.
23.	Kan Nagao : 超高齢社会における有床義歯技工の勘どころ, 一般社団法人日本歯科技工学会中国四国支部平成30年度学術大会, Oct. 2018.
24.	Keiko Fujimoto, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : 舌の厚み測定の臨床的意義の検討, 平成30年度一般社団法人日本老年歯科医学会第29回学術大会, Jun. 2018.
25.	Takashi Matsuda, 倉橋宏輔, 田上義弘, 石田雄一, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : デジタル技術を用いた全部床義歯治療の効率化-全部床義歯形状のデジタル化の精度検討-, 平成29年度公益社団法人日本補綴歯科学会中国四国支部学術大会, Aug. 2017.
26.	Takaharu Goto, Takahiro Kishimoto, 檜原司, Takashi Matsuda, 渡邉恵, Kan Nagao and Tetsuo Ichikawa : オーラルフレイル関連兆候と食行動との関係:噛むことの重要性, 日本補綴歯科学会第126回学術大会, Jul. 2017.
27.	Kan Nagao : 学術委員会シンポジウム「口腔機能低下症」について理解を深めよう, 日本老年歯科医学会第28回学術大会, Jun. 2017.
28.	Keiko Fujimoto, Tsuyoshi Honda, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : 咀嚼の主観的評価に関わる客観的指標の検討, 日本老年歯科医学会第28回学術大会, Jun. 2017.
29.	Hideki Suito, Seiko Hongama, 藤本けい子, Kan Nagao and Tetsuo Ichikawa : 脳血管疾患と口腔内状態・オーラルリテラシーとの関連性, 日本老年歯科医学会第28会学術大会, Jun. 2017.
30.	Tsuyoshi Honda, 藤本けい子, 馬場拓朗, 南憲一, 檜垣宜明, Kan Nagao, Fumiaki Kawano, Syusai Sato and Tetsuo Ichikawa : 口蓋形態と咬合高径が食塊形成能に及ぼす影響, 平成28年度日本補綴歯科学会九州支部，中国・四国支部合同学術大会, Sep. 2016.
31.	Kan Nagao : 補綴歯科診療中における感染対策, 公益社団法人日本補綴歯科学会第125回学術大会, Jul. 2016.
32.	Takashi Matsuda, 倉橋宏輔, Yuki Iwawaki, Takaharu Goto, 柏原稔也, Kan Nagao, Tetsuo Ichikawa and 市場裕康 : デジタル技術を用いた全部床義歯治療の効率化:咬合圧印象用トレーによる印象採得の評価, 平成28年度公益社団法人日本補綴歯科学会第125回学術大会, Jul. 2016.
33.	Takaharu Goto, 檜垣宜明, 石田雄一, 渡邉恵, Kan Nagao and Tetsuo Ichikawa : 口腔内のにおい強度に着目した新しい咀嚼能率測定方法の開発, 平成28年度公益社団法人日本補綴歯科学会第125回学術大会, Jul. 2016.
34.	谷口裕重, 松尾浩一郎, 町田奈美, 金澤学, 中川量晴, 古屋純一, 津賀一弘, 池邉一典, 上田貴之, 田村文誉, Kan Nagao, 山本健, 櫻井薫 and 水口俊介 : 入院患者における舌圧と栄養，握力との関連―日本老年歯科医学会学術委員会主導研究(プロジェクト藤田)―, 日本老年歯科医学会第27回学術大会, Jun. 2016.
35.	中川量晴, 松尾浩一郎, 町田奈美, 金澤学, 金澤学, 谷口裕重, 津賀一弘, 池邉一典, 上田貴之, 田村文誉, Kan Nagao, 山本健, 櫻井薫 and 水口俊介 : 入院高齢者における口腔衛生状態と栄養状態-日本老年歯科医学会学術委員会主導研究(プロジェクト藤田)-, 日本老年歯科医学会第27回学術大会, Jun. 2016.
36.	町田奈美, 櫻井薫, 松尾浩一郎, 谷口裕重, 中川量晴, 金澤学, 古屋純一, 津賀一弘, 池邉一典, 上田貴之, 田村文誉, Kan Nagao, 山本健 and 水口俊介 : 悪性腫瘍周術期での舌圧,咬合力,握力の変化―日本老年歯科医学会学術委員会主導研究(プロジェクト藤田)―, 日本老年歯科医学会第27回学術大会, Jun. 2016.
37.	倉橋宏輔, Takashi Matsuda, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : 歯科訪問診療でも対応可能なハンディスキャナーを用いた複製義歯製作法, 一般社団法人日本老年歯科医学会第27回総会・学術大会, Jun. 2016.
38.	馬場拓朗, 藤本けい子, 本田剛, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : オトガイ舌骨筋に着目した口腔機能低下予測因子の検討, 一般社団法人日本老年歯科医学会第27回総会・学術大会, Jun. 2016.
39.	Yuichi Ishida, Kan Nagao and Tetsuo Ichikawa : スプリントの磁気治療器としての応用, 第25回日本磁気歯科学会学術大会, Nov. 2015.
40.	馬場拓朗, Hirohiko Okamura, Yang Di, Kan Nagao, Tatsuji Haneji and Tetsuo Ichikawa : ラット臼歯部咬合支持の喪失がオトガイ舌骨筋および咬筋の筋組成へ与える影響, 日本解剖学会第70回中国・四国支部学術集会, Oct. 2015.
41.	Takashi Matsuda, Takaharu Goto, Yuichi Ishida, Toshiya Kashiwabara, Kan Nagao, Tetsuo Ichikawa, 萬好哲也 and 井上三四郎 : デジタル技術を用いた全部床義歯治療の効率化 -咬合圧印象用トレーの臨床評価-, 平成27年度公益社団法人日本補綴歯科学会中国・四国支部学術大会, Sep. 2015.
42.	Keiko Fujimoto, 馬場拓朗, Tsuyoshi Honda, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : テクスチャープロファイル分析による義歯安定剤および口腔保湿剤の選択法の検討, 日本老年歯科医学会第26回学術大会, Jun. 2015.
43.	藤本けい子, 馬場拓朗, Tsuyoshi Honda, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : テクスチャープロファイル分析による義歯安定剤および口腔保湿剤の選択法の検討, 日本老年歯科医学会第26回学術大会, Jun. 2015.
44.	Tsuyoshi Honda, 藤本けい子, 馬場拓朗, Kan Nagao and Tetsuo Ichikawa : 嚥下音と嚥下動態の同時記録による嚥下音産生機序の解明, (公社)日本補綴歯科学会第124回学術大会, May 2015.
45.	Takashi Matsuda, Takaharu Goto, Yuichi Ishida, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : デジタル技術を用いた全部床義歯治療の効率化-非接触式デジタル印象採得の可能性の検討-, 平成26年度(公社)日本補綴歯科学会中国・四国,関西支部合同支部学術大会, Sep. 2014.
46.	Tsuyoshi Honda, 藤本けい子, 東岡紗知江, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 嚥下量・頚部姿勢変化による嚥下音への影響, 日本老年歯科医学会第25回学術大会, Jun. 2014.
47.	Bayarmagnai Sapaar, Kan Nagao, Takaharu Goto, Yoshihito Naitou and Tetsuo Ichikawa : ノンメタルクラスプデンチャーのクラスプと義歯床のデザインに関する検討, 公益社団法人日本補綴歯科学会第123回学術大会, May 2014.
48.	南憲一, Takaharu Goto, 本田剛, Toshiya Kashiwabara, Kan Nagao and Tetsuo Ichikawa : 義歯安定剤の使用が咬合接触および下顎運動に与える影響, 第6回日本義歯ケア学会学術大会, Jan. 2014.
49.	Sapaar Bayarmagnai, Yoshihito Naitou, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : Loss of retentive force and per,manent deformation of polyethylene terephthalate and polyster clasps retainers, 平成25年度公益社団法人日本補綴歯科学会中国・四国支部学術大会, Sep. 2013.
50.	檜垣宜明, Takaharu Goto, Yuichi Ishida, Yoritoki Tomotake, Kan Nagao, Tetsuo Ichikawa and 多田望 : 口腔内刺激が脳機能活動に与える影響, 平成25年度公益社団法人日本補綴歯科学会中国・四国支部学術大会, Aug. 2013.
51.	Takashi Matsuda, Takaharu Goto, Yuichi Ishida, Toshiya Kashiwabara, Kan Nagao, Tetsuo Ichikawa and Masayo Okajima : デジタル技術を用いた全部床義歯治療の効率化 ―3Dスキャナによる研究用模型と作業用模型の一致度の検討―, 平成25年度公益社団法人日本補綴歯科学会中国・四国支部学術大会, Aug. 2013.
52.	Kan Nagao : 症例から学ぶ摂食・嚥下障害義歯の役割と使い方, 第14回徳島摂食・嚥下研究会学術講演会, Jun. 2013.
53.	Tsuyoshi Honda, 比嘉仁志, 東岡紗知江, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 多チャンネルセンサを用いた嚥下音記録による嚥下動態評価, 日本老年歯科医学会第24回学術大会, Jun. 2013.
54.	Sachie Toko, Hitoshi Higa, Tsuyoshi Honda, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : スダチのにおい刺激による咀嚼嚥下促進補助法の開発:刺激剤と刺激方法の検討, 日本老年歯科医学会第24回学術大会, Jun. 2013.
55.	Takaharu Goto, Kan Nagao, Yuichi Ishida, Toshiya Kashiwabara, Yoritoki Tomotake and Tetsuo Ichikawa : インプラントオーバーデンチャー床下組織の負担分布と義歯の動揺に関する研究, 第22回日本歯科医学会総会, Nov. 2012.
56.	Kan Nagao, Takaharu Goto, Yuichi Ishida, Tetsuo Ichikawa, 秀島雅之, 越野寿, 星合和基 and 梅川義忠 : マグネットを義歯に付着する際は，加圧状態の方が無圧よりも経過がよいか?-デルファイ法による調査-, 第22回日本磁気歯科学会学術大会, Nov. 2012.
57.	Takaharu Goto, Yuichi Ishida, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : 磁性アタッチメントを歯冠内・歯冠外アタッチメントとして用いた長期経過症例について, 第22回日本磁気歯科学会学術大会, Nov. 2012.
58.	大野彩, 窪木拓男, Tetsuo Ichikawa, 秀島雅之, Yuji Sato, 玉置勝司, 赤川安正, Kan Nagao, 櫻井薫, 馬場一美, 皆木省吾, 鱒見進一, 佐藤博信, 澤瀬隆, 長岡英一, 和気裕之, 大山喬史, 平井敏博 and 佐々木啓一 : OHIP日本語版を用いた補綴治療患者の口腔関連QOL評価における最小重要差の検討, 平成24年度 (社)日本補綴歯科学会中国・四国・九州合同学術大会, Sep. 2012.
59.	Sapaar Bayarmagnai, Yoshihito Naitou, Takaharu Goto, Kan Nagao and Tetsuo Ichikawa : Extracellular DNA of Candida albicans and its effect on biofilm formation on denture base materials, 平成24年度 (社)日本補綴歯科学会中国・四国・九州合同学術大会, Sep. 2012.
60.	東岡紗知江, 比嘉仁司, 本田剛, Seiko Hongama, Kan Nagao, Tetsuo Ichikawa and 堀内政信 : 咀嚼過程における摂取食品のテクスチャー変化, 平成24年度 (社)日本補綴歯科学会中国・四国・九州合同学術大会, Sep. 2012.
61.	Takashi Matsuda, Takaharu Goto, Yuichi Ishida, Toshiya Kashiwabara, Kan Nagao, Tetsuo Ichikawa and Junji Komoda : デジタル技術を用いた全部床義歯治療の効率化 -無歯顎模型に対するデジタル印象の印象精度の検討-, 平成24年度 (社)日本補綴歯科学会中国・四国・九州合同学術大会, Sep. 2012.
62.	本田剛, 比嘉仁司, 東岡紗知江, Seiko Hongama, Kan Nagao, Tetsuo Ichikawa and 今井守夫 : 嚥下音を用いた嚥下スクリーニング検査法の開発, 平成24年度 (社)日本補綴歯科学会中国・四国・九州合同学術大会, Sep. 2012.
63.	Seiko Hongama, 東岡紗知江, 本田剛, Kan Nagao and Tetsuo Ichikawa : スダチにおい刺激による唾液分泌と食塊形成への影響, 日本老年歯科医学会第23回学術大会, Jun. 2012.
64.	Takaharu Goto, Yuichi Ishida, Yoritoki Tomotake, Kan Nagao, Tetsuo Ichikawa and 宮本雅司 : 義歯の動揺計測からインプラントオーバーデンチャー床下組織の負担分布を推定できるか, 社団法人日本補綴歯科学会第121回学術大会, May 2012.
65.	Takaharu Goto, Kan Nagao, Takashi Matsuda, Toshiya Kashiwabara and Tetsuo Ichikawa : デルファイ法を用いた義歯にとっての妥当なリコール間隔に関するアンケート調査, 第4回日本義歯ケア学会学術大会, Jan. 2012.
66.	Kan Nagao : デルファイ法とは, 第21回日本磁気歯科学会学術大会, Nov. 2011.
67.	Yoshihito Naitou, 東岡紗知江, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : イグサ粉末を添加した義歯安定材のカンジダ菌に対する抗菌活性とその物性, 日本老年歯科医学会第22回学術大会, Jun. 2011.
68.	Yoshihito Naitou, 李景, 東岡紗知江, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 生物由来物質を用いた抗菌性ティッシュコンディショナーの抗カンジダ効果と機械的性質, 日本老年歯科医学会総会・学術大会プログラム・抄録集, 141, Jun. 2011.
69.	木村彩, 窪木拓男, Tetsuo Ichikawa, 秀島雅之, Yuji Sato, 玉置勝司, 赤川安正, Kan Nagao, 櫻井薫, 馬場一美, 皆木省吾, 鱒見進一, 佐藤博信, 澤瀬隆, 長岡英一, 和気裕之, 大山喬史, 平井敏博 and 佐々木啓一 : 補綴治療の難易度を測定するプロトコルの信頼性と妥当性の検討, 社団法人日本補綴歯科学会第120回記念学術大会, May 2011.
70.	Toshiya Kashiwabara, 後藤崇晴, Kan Nagao and Tetsuo Ichikawa : マイクロ波重合型床用レジン重合法における磁気遮蔽の効果, 社団法人日本補綴歯科学会第120回記念学術大会, May 2011.
71.	T Goto, H Nishinaka, Toshiya Kashiwabara, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : Significance of the Main Occluding Area in Implant Treatment, 社団法人日本補綴歯科学会第120回記念学術大会, May 2011.
72.	Kan Nagao, Natsumi Fujiwara, Tomoko Kimura, Akihiro Yasue, Masami Yoshioka, Yoichiro Miyake, Katsuhiko Yoshimoto and Tetsuo Ichikawa : 東京医科歯科大学の臨床実習視察報告, 四国歯学会第38回例会, Mar. 2011.
73.	設楽純子, 矢納義高, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 殺菌剤配合洗口液が口腔衛生状態に与える影響について, 第59回日本口腔衛生学会・総会, Sep. 2010.
74.	後藤崇晴, Yuichi Ishida, Yoritoki Tomotake, Kan Nagao and Tetsuo Ichikawa : アタッチメントの違いがインプラントオーバーデンチャー床下組織の負担圧に及ぼす影響 -義歯の剛性の影響-, 第40回日本口腔インプラント学会・学術大会, Sep. 2010.
75.	Yoshihito Naitou, 李景, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 生物由来物質を用いた抗菌性ティッシュコンディショナーの抗カンジダ効果と機械的性質, Japanese Journal of Gerodontology, Vol.25, No.2, 252-253, Sep. 2010.
76.	Yoshizo Matsuka, Kan Nagao, 木村彩, 三野卓哉, 荒川光, 藤澤政紀, 小野高裕, 玉置勝司, 津賀一弘, 築山能大, 萩原芳幸 and 窪木拓男 : ガイドライン作成に向けたペイシェント・クエスチョンの収集その2 患者インタビュー, 平成22年度(社)日本補綴歯科学会中国・四国支部学術大会, Aug. 2010.
77.	木村彩, Yoshizo Matsuka, 三野卓哉, 荒川光, 藤澤政紀, 小野高裕, 玉置勝司, 津賀一弘, 築山能大, Kan Nagao, 萩原芳幸 and 窪木拓男 : ガイドライン作成に向けたペイシェント・クエスチョンの収集その1 患者アンケート, 平成22年度(社)日本補綴歯科学会中国・四国支部学術大会, Aug. 2010.
78.	Kan Nagao and Tetsuo Ichikawa : 義歯の良好な術後経過を得るためのリコール間隔について ―デルファイ法による調査―, 平成22年度(社)日本補綴歯科学会中国・四国支部学術大会, Aug. 2010.
79.	木村彩, 松香芳三, 三野卓哉, 荒川光, 藤澤政紀, 小野高裕, 玉置勝司, 津賀一弘, 築山能大, Kan Nagao, 萩原芳幸 and 窪木拓男 : ガイドライン作成に向けたペイシェント・クエスチョンの収集その1 患者アンケート, 平成22年度(社)日本補綴歯科学会中国・四国支部学術大会, Aug. 2010.
80.	松香芳三, Kan Nagao, 木村彩, 三野卓哉, 荒川光, 藤澤政紀, 小野高裕, 玉置勝司, 津賀一弘, 築山能大, 萩原芳幸 and 窪木拓男 : ガイドライン作成に向けたペイシェント・クエスチョンの収集その2 患者インタビュー, 平成22年度(社)日本補綴歯科学会中国・四国支部学術大会, Aug. 2010.
81.	後藤崇晴, Kan Nagao, Yuichi Ishida, Toshiya Kashiwabara, Tetsuo Ichikawa, 萬好哲也 and 市場裕康 : 次世代の義歯製作法に関する一考察, 平成22年度(社)日本補綴歯科学会中国・四国支部学術大会, Aug. 2010.
82.	設楽純子, 大熊桂子, 矢納義高, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 殺菌剤配合洗口液が口腔衛生状態に与える影響について, Journal of Dental Health, Vol.60, No.4, 454, Aug. 2010.
83.	Seiko Hongama, 東岡紗知江, Yoshihito Naitou, Kan Nagao and Tetsuo Ichikawa : 姿勢変化が喉頭閉鎖持続時間に与える影響, 日本老年歯科医学会総会第21回学術大会, Jun. 2010.
84.	Yoshihito Naitou, 李景, Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 生物由来物質を用いた抗菌性ティッシュコンディショナーの抗カンジダ効果と機械的性質, 一般社団法人日本老年歯科医学会第21回学術大会, Jun. 2010.
85.	Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : 磁気センサを用いた簡易嚥下機能測定方法嚥下姿勢と辛味成分が測定値に与える影響, 日本老年歯科医学会総会・学術大会プログラム・抄録集, 167, Jun. 2009.
86.	石田雄一, Yutaka Sato, Kan Nagao and Tetsuo Ichikawa : MIセンサ内蔵姿勢検出センサの仮想咬合平面設定への応用, 第18回日本磁気歯科学会学術大会抄録, Oct. 2008. (Keyword) occlusion
87.	Masayo Okajima, Kan Nagao, Yutaka Sato, 吉田有里 and Tetsuo Ichikawa : The Development of Post-Prosthetic Simulation and Face Prediction using Three-dimensional Image Processing, The Journal of the Japan Prosthodontic Society, Vol.52, No.117, 97, Jun. 2008.
88.	田北啓洋, 藤田圭二, Kan Nagao, Tetsuo Ichikawa and Yoshio Hayasaki : デンタルメモリーー歯科補綴物への情報記録ー, IEICE Technical Report, Vol.107, No.154, 51-54, Jul. 2007.
89.	Seiko Hongama, Kan Nagao and Tetsuo Ichikawa : Simple Screeing Method for Swallowing Disorder : Description of MI sensor-oriented System, 日本補綴歯科学会雑誌. 特別号, 日本補綴歯科学会学術大会抄録集 = Proceedings of the ... conference, the Japan Prosthodontic Society, Vol.51, No.116, 144, May 2007. (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1571135650657663232 (CiNii: 1571135650657663232)
90.	Kan Nagao, 矢納義高, Tetsuo Ichikawa, Seiko Hongama, 市場裕康 and 萬好哲也 : 塩化ベンゼトニウム配合洗口液を用いた高齢者の口内環境の改善, The Journal of the Japan Prosthodontic Society, Vol.51, 158, May 2007.
91.	Seiko Hongama, Kan Nagao, Masaru Hada and Tetsuo Ichikawa : 歯間空隙の存在が構音運動に及ぼす影響:上顎全部床義歯装着者による観察, The Journal of the Japan Prosthodontic Society, Vol.48, 54, May 2004.
92.	Seiko Hongama, Tetsuo Ichikawa, Masatoshi Ishikawa, Kan Nagao, Fumiaki Kawano and Masaru Hada : 脳卒中患者に可撤性PLP付全部床義歯を適用した1症例音声学及び力学的考察, The Journal of the Japan Prosthodontic Society, Vol.44, 199, Nov. 2000.

Et cetera, Workshop:

1.	Kan Nagao : 摂食嚥下に関わる口の重要性, 平成28年度徳島県医師会摂食嚥下講習会, Dec. 2016.
2.	Kan Nagao : 準備期・口腔期における義歯の役割, 徳島摂食嚥下研究会胃瘻造設時嚥下機能評価のための特別講演会, Feb. 2015.
3.	Kan Nagao : 義歯関連補助剤の効用, 第1回(社)日本老年歯科医学会徳島支部研修会, Feb. 2012.
4.	Kan Nagao, Tomoko Kimura, Akihiro Yasue, Yoichiro Miyake, Katsuhiko Yoshimoto and Tetsuo Ichikawa : 東京医科歯科大学歯学部歯学科の臨床実習視察報告, Shikoku Dental Research, Vol.24, No.2, 79-84, Jan. 2012. (Tokushima University Institutional Repository) ● Metadata: 109820 (Tokushima University Institutional Repository: 109820)
5.	Kan Nagao : 診療ガイドラインの必要性とその作成方法, 研究成果報告会「補綴歯科診療におけるエビデンスの構築とガイドラインの作成」, Nov. 2011.

Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)

新しい歯科用排気システムの構築～効果的なエアロゾル・微細粒子の飛散防止法の確立～ (Project/Area Number: 24K13262 )
嚥下機能を向上させるための安全かつ簡便で有効性の高い口蓋形成方法の確立 (Project/Area Number: 24K13007 )
栄養・食品多様性の低下に起因する歯科的要因を解明し、フレイルを防止する (Project/Area Number: 18K09684 )
Early detection and early intervention against the dysphagia that results from Sarcopenia in older people (Project/Area Number: 15K11197 )
Study on the design of complete denture for mastication and swallowing (Project/Area Number: 24592920 )
Quality of mastication: Approach from food phenotype, sensation, and brain activity (Project/Area Number: 24390436 )
Causes of the delay in efficacies of oral care during chronic phase (Project/Area Number: 23592853 )
Establishment of guideline for occlusal scheme in complete denture (Project/Area Number: 19592244 )
The development of taylor-made materials with biomedical function. (Project/Area Number: 17390521 )
The Assessment of Swallowing using Tongue and Laryngeal Movements - Influence of the Factor in Food - (Project/Area Number: 13672041 )
Quality assessment of bone and surface modification of dental implant (Project/Area Number: 12470421 )
高齢者の口腔ケア・義歯ケアの再検討その1 義歯洗浄剤の再検討 (Project/Area Number: 10771085 )
弾性解析を負担圧分布からみた軟質裏装材および義歯安定材の効果的使用法の検討と開発 (Project/Area Number: 08771792 )
Three Dimensional examination of Bone-Implant interface using various implant materials (Project/Area Number: 08457530 )
Movements of a Maxillary Complete denture and the Occlusal contact on the balancing side (Project/Area Number: 03670917 )
Search by Researcher Number (30227988)

Associate Professor : Nagao, Kan

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Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)