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Study of high-strength metal-free foundation restoration considering protection of remaining dentin

Research Project

Project/Area Number 21K09973
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Komada Wataru  東京医科歯科大学, 大学院医歯学総合研究科, 准教授 (10447493)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords支台築造 / メタルフリー / 漏斗状根管 / ジルコニア / 二ケイ酸リチウムガラスセラミックス / ジルコニアチューブ
Outline of Research at the Start

本研究ではメタルフリー治療を念頭に置いて金属に置き換わる材料として歯冠修復装置に用いられるジルコニア,二ケイ酸リチウムガラスセラミックに注目した.セラミック単体を築造体として用いるのではなく,セラミック材料とコンポジットレジンとを組み合わせることで残存歯質を保護し,かつ強度を持たせた次世代メタルフリー支台築造術式の確立を目指す.

Outline of Final Research Achievements

Endodontically treated teeth restored using resin composites increase the stress concentration at the cervical area.
We investigated two types of foundation restoration methods without metal materials using ceramics and composite resin with improved strength in the cervical area. One method was that teeth with flared root canals could be reinforced by using a combination of a resin composite and lithium disilicate ceramic. Another one was that the zirconia tube reinforcing the cervical area in endodontically treated molars. Two methods were evaluated in model experiments.
Reinforcement of flared root canals using a combination of resin composite for the core and lithium disilicate ceramic for the post was superior to resin composite and glass fiber in mechanical properties when restoring the single crown. The zirconia tube significantly reinforced the cervical area in the buccal and lingual roots of an endodontically treated model molar restored using a composite resin core.

Academic Significance and Societal Importance of the Research Achievements

金属アレルギーの問題,金属価格高騰の問題から金属不使用の歯科治療方法の開発は有用となる.これまで支台築造にあまり使用されてこなかった二ケイ酸リチウムガラスセラミックスやジルコニア(ジルコニアチューブ)を既存のコンポジットレジンやグラスファイバーポストと組み合わせて使用することで,歯頚部応力集中を回避し,高強度メタルフリー支台築造が可能であることを示した.
今後はブリッジの支台歯としての応用も見込まれ,メタルフリー歯科治療の発展に寄与できる.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (11 results)

All 2024 2023 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Surface strain at the cervical area and fracture strength of flared root canals reinforced using a zirconia tube and glass-fiber post2024

    • Author(s)
      Daiki Kondo, Wataru Komada, Shinya Oishi, Kenji Fueki
    • Journal Title

      Journal of Dental Sciences

      Volume: 未定

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fracture strength of flared root canals reinforced using different post and core materials2023

    • Author(s)
      Tsukahara Ruri, Komada Wataru, Oishi Shinya, Yoshimatsu Shu, Miura Hiroyuki, Fueki Kenji
    • Journal Title

      Journal of Prosthodontics

      Volume: 32 Issue: 7 Pages: 639-645

    • DOI

      10.1111/jopr.13616

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A composite resin core with a new zirconia tube reduces the surface strain at the cervical area of a mandibular molar: A model tooth study2023

    • Author(s)
      Oishi Shinya、Komada Wataru、Tsukahara Ruri、Yoshimatsu Shu、Kondo Daiki、Omori Satoshi、Nozaki Kosuke、Miura Hiroyuki、Fueki Kenji
    • Journal Title

      Journal of Prosthodontic Research

      Volume: 67 Issue: 1 Pages: 70-76

    • DOI

      10.2186/jpr.JPR_D_21_00243

    • ISSN
      1883-1958, 1883-9207
    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 小臼歯におけるジルコニアチューブによる歯頸部補強効果を考慮した支台築造法の検討2023

    • Author(s)
      近藤大貴,駒田 亘,大石晋也,笛木賢治
    • Organizer
      日本補綴歯科学会 第132回記念学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 歯根破折を再考する 残存歯質保護を考慮した支台築造2023

    • Author(s)
      駒田 亘
    • Organizer
      第44回日本歯内療法学会学術大会 The 21st KAE-JEA Joint Meeting
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 表面処理の違いが根管象牙質に対するレジンセメントの接着強さと界面に及ぼす影響2023

    • Author(s)
      尾崎 太亮, 大竹 志保, 駒田 亘, 大石 晋也, 笛木 賢治
    • Organizer
      日本補綴歯科学会 第132回記念学術大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 小臼歯におけるジルコニアチューブによる歯頚部補強効果を考慮した支台築造法の検討2023

    • Author(s)
      近藤大貴,駒田 亘,大石晋也,笛木賢治
    • Organizer
      日本補綴歯科学会第132回学術大会-設立90周年記念大会-
    • Related Report
      2022 Research-status Report
  • [Presentation] 大臼歯におけるジルコニアチューブによる歯頚部補強効果を考慮した支台築造法の検討2021

    • Author(s)
      大石晋也, 駒田 亘, 塚原瑠里, 吉松 秀, 野崎浩佑, 大森 哲, 三浦宏之
    • Organizer
      日本補綴歯科学会 第130回学術大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Effect of Glass Fiber Sleeve for Reinforcement of Flared Root.2021

    • Author(s)
      S. Yoshimatsu, W. Komada, R. Nemoto, S. Oishi, R. Tsukahara, S. Omori. K. Nozaki
    • Organizer
      The 69th Annual Meeting of Japanese Association for Dental Research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] The Influence of Zirconia Tube for Stress in Endodontically-Treated Molar2021

    • Author(s)
      S. Oishi, W. komada, D. Kondo, R. Tsukahara, S. Yoshimatsu, Y. Yokosuka S. Omori, K. Nozaki, H. Miura
    • Organizer
      The 69th Annual Meeting of Japanese Association for Dental Research
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 歯科用支台築造用部材及び製造方法2021

    • Inventor(s)
      駒田 亘,大石 晋也
    • Industrial Property Rights Holder
      駒田 亘,大石 晋也
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-079105
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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