Tokushima University / Educator and Researcher Directory --- Iuchi, Tomoki

Search:

Tokushima University ⟩ University Hospital ⟩ 先端歯科医療開発研究プロジェクト ⟩
Tokushima University ⟩ University Hospital ⟩ Clinical Division ⟩ Department of Oral and Maxillofacial Surgery ⟩ 口腔内科 ⟩
Tokushima University ⟩ Faculty of Dentistry ⟩ Course in Dentistry ⟩ Clinical Dentistry for Oral Health and Surgery ⟩ Oral and Maxillofacial Disease Control ⟩

(Files for researchmap) [PDF manual] [Auto-propagate to researchmap]

Research

Field of Study

Subject of Study

Book / Paper

Academic Paper (Judged Full Paper):

1.	Yusuke Matsuki, Yumika Ida, Tomoki Iuchi, Wakana Oki, Kazuhide Yonekura, Yuta Utsumi, Masaomi Ikeda, Lorenzo Breschi and Keiichi Hosaka : Urethane Tetramethacrylate Monomers and Nano-Fillers Enhance Dentin Bond Strength of a One-Step Universal Adhesive, The Journal of Adhesive Dentistry, 27, 287-295, 2025. (Summary) This study evaluated the effects of incorporating urethane tetramethacrylate (UTMA) monomers and inorganic nano-fillers on the bonding performance and mechanical properties of a next-generation one-step universal adhesive, Clearfil Universal Bond Quick 2 (UBQ2), with a focus on clarifying its improvements over the previous formulation. Five adhesive systems were investigated: UBQ2, two experimental variants lacking either UTMA (UBQ2-U) or nano-fillers (UBQ2-F), the predecessor adhesive (Clearfil Universal Bond Quick, UBQ), and a gold-standard two-step self-etch adhesive (Clearfil SE Bond 2, SE2). Microtensile bond strength (μTBS), bond layer thickness (L), ultimate tensile strength (UTS), and water sorption (Wsp) were evaluated. UBQ2 demonstrated significantly higher UTS and lower Wsp than UBQ2-U (P 0.001 and P = 0.03, respectively), indicating enhanced mechanical resilience and hydrolytic stability due to the presence of UTMA. Compared to UBQ, UBQ2 showed improved mechanical properties while maintaining comparable μTBS. The absence of nano-fillers (UBQ2-F) significantly reduced μTBS (P 0.05), confirming their critical role in bonding performance. Despite forming a thinner adhesive layer, UBQ2 achieved dentin bond strength comparable to SE2. By combining UTMA and nano-fillers, UBQ2 has improved wettability compared to conventional products, while also providing high bonding performance and mechanical properties with a one-step application. These findings support the development of universal adhesives through simplified clinical protocols and improved material properties. This study demonstrates that incorporating nano-fillers and UTMA into a one-step universal adhesive (UBQ2) enhances mechanical strength, reduces water sorption, and maintains high dentin bond strength. Clinically, UBQ2 offers a simplified yet reliable bonding performance comparable to SE2. (Keyword) dentin bonding performance / multi-functional monomer / nano-filler / universal adhesive (Link to Publication Site) ● Publication site (DOI): 10.3290/j.jad.c_2432 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 41416418 ● Summary page in Scopus @ Elsevier: 2-s2.0-105025171322 (DOI: 10.3290/j.jad.c_2432, PubMed: 41416418, Elsevier: Scopus)
2.	Tomoki Iuchi, Kazuhide Yonekura, Yumika Ida, Yutaro Motoyama, Masaomi Ikeda, Kenichi Hamada, Masatoshi Nakajima and Keiichi Hosaka : The effect of HEMA and 10-MDP in the bonding agent of a two-step self-etch system on water sorption, elastic modulus, and microtensile bond strength to dentin, Dental Materials Journal, 2025. (Summary) This study evaluated the effects of HEMA and 10-MDP in the bonding agent in a 2-step self-etch adhesive system, Clearfil SE Bond 2, on water sorption (W) and elastic modulus (E) of the polymerized bonding agent. The microtensile bond strength (µTBS) to dentin was also evaluated initially and after 10,000 thermal cycles (TC10,000). Four bonding agents were tested: the original, H-free (excluding HEMA), M-free (excluding 10-MDP), and HM-free (excluding HEMA and 10-MDP). HEMA increased W and decreased E. Initial µTBS (TC0) was highest for the original and lowest for HM-free. After TC10,000, the original maintained the highest µTBS, indicating the importance of HEMA and 10-MDP. TC10,000 did not reduce µTBS for any groups. HEMA and 10-MDP compromised mechanical property and increased water sorption, suggesting these components could potentially compromise adhesive stability. (Tokushima University Institutional Repository) ● Metadata: 2013230 (Link to Publication Site) ● Publication site (DOI): 10.4012/dmj.2024-209 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 39631950 ● Search Scopus @ Elsevier (PMID): 39631950 ● Search Scopus @ Elsevier (DOI): 10.4012/dmj.2024-209 (Tokushima University Institutional Repository: 2013230, DOI: 10.4012/dmj.2024-209, PubMed: 39631950)

Review, Commentary:

1.	TAKAGI Nakato, Tomoki Iuchi, Yumika Ida and Keiichi Hosaka : ファイバー強化型フロアブルコンポジットレジン「エバーエックスフロー」について, The Nippon Dental Review, 84, 12, 111-116, Dec. 2024. (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520865508270642688 (CiNii: 1520865508270642688)

Proceeding of Domestic Conference:

1.	YAMAMOTO Asami, Yumika Ida, Tomoki Iuchi and Keiichi Hosaka : 変色歯にインターナルブリーチ施術後，バイレイヤー3Dプリントインデックスを用いてダイレクトベニア修復を行った症例, 第36回日本歯科審美学会, Dec. 2025.
2.	Esaki Rika, Tomoki Iuchi and Keiichi Hosaka : Preliminary Study on Color Matching of Transcend Universal Shade Resin Composite After Tooth Bleaching, 日本歯科審美学会第36回学術大会, Dec. 2025.
3.	Ryo Kato, Tomoki Iuchi, Yumika Ida, Kazuhide Yonekura, 中島正俊, Takeo Minamikawa, Takuo Tanaka, Taka-aki Yano and Keiichi Hosaka : 超解像赤外分光イメージングによるレジン象牙質接着界面の分子分布および重合度解析, 2025日本歯科保存学会秋季学術大会, Nov. 2025.
4.	OKI Wakana, Yumika Ida, Tomoki Iuchi, Yusuke Matsuki and Keiichi Hosaka : 酸化ユウロピウムを混和した接着性レジンセメントの発光強度と機械的特性の評価, 日本歯科保存学会 2025年秋季学術大会, Nov. 2025.
5.	MUKUNOKI Yuriko, Yumika Ida, Tomoki Iuchi, 池田正臣, 中島正俊 and Keiichi Hosaka : 光重合開始材の種類と照射条件が2ステップセルフエッチングシステムボンディング材の重合性に及ぼす影響, 第44回日本接着歯学会, Oct. 2025.
6.	山本麻美, Yumika Ida, Tomoki Iuchi, Yusuke Matsuki, OKI Wakana, (名) Diana, 池田正臣, 中島正俊 and Keiichi Hosaka : 根管象牙質に対するコンポジットレジン支台築造システムの接着性能に及ぼす照射距離の影響, 第6回象牙質歯髄治療学会, Jun. 2025.
7.	松野泰樹, Keiichiro Watanabe, Yumika Ida, 内海雄太, Tomoki Iuchi and Keiichi Hosaka : 3Dプリントクリアインデックステクニックを用いたSimplifiedダイレクトCRブリッジのリアルタイム重合収縮応力解析, 162回日本歯科保存学会学術大会, Jun. 2025.

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

Search by Researcher Number (01021071)