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A new preventive strategy for early enamel erosion.

Research Project

Project/Area Number 16K11563
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Conservative dentistry
Research InstitutionShowa University

Principal Investigator

Ogino Reina  昭和大学, 歯学部, 講師 (80585779)

Co-Investigator(Kenkyū-buntansha) 柴田 陽  昭和大学, 歯学部, 教授 (30327936)
宮崎 隆  昭和大学, 歯学部, 特任教授 (40175617)
有本 隆文  昭和大学, 歯学部, 講師 (60407393)
Project Period (FY) 2016-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsエナメル質 / 再石灰化 / マイクロCT / ナノインデンテーション / ラマン分光法 / ハイドロキシアパタイト / 脱灰 / オフィスブリーチ / ラマン分光分析 / 力学的特性 / ナノインデンター / マイクロラマン分光法 / 過酸化水素 / 初期脱灰病変 / 抗菌性 / 耐酸性 / 物性
Outline of Final Research Achievements

The lack of regenerative potential in mature tooth enamel necessitates a traditional clinical practice that recommends complete removal of demineralized enamel to create a hard foundation for a restorative material. Here, we demonstrate that in situ synthesis of monoclinic apatite reprograms the function of mature enamel back to the embryonic stage of development, allowing marked regeneration in enamel erosion. A partial breakdown of enamel nanocrystals by a contemporary tooth-bleaching procedure causes mild annealing. Selective ion implantation of SiO32- and F- sustains a transition from a hexagonal apatite form to a monoclinic phase during the mild annealing process. The high dielectric constant of monoclinic apatite facilitates self-repair in early tooth enamel erosion.

Academic Significance and Societal Importance of the Research Achievements

現在のエナメル質再石灰化法はエナメル質のミネラル喪失部に歯の原料となるカルシウムやリンを供給し,再石灰化を促進する方法が主流である.本研究では一般的に行われている歯の漂白処置後に石灰化イオン溶液を作用させると,フルオロアパタイトに代表される結晶構造に比較して,より耐酸性に優れ,高誘電率で再結晶能が高い結晶構造を生じることによりエナメル質を改質し,強度を向上させることが明らかになった.本研究に用いた石灰化イオン溶液はリン酸イオンやカルシウムイオンを含んでいないため,再石灰化したエナメル質における力学的強度の向上はエナメル小柱に含まれるわずかな空隙の密度が増加したことに起因すると考えられる.

Report

(6 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (18 results)

All 2021 2019 2018 2017 2016 Other

All Int'l Joint Research (4 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Int'l Joint Research] The University of Sydney(オーストラリア)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Harvard University(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Auckland University of Technology(New Zealand)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] The University of Sydney(Australia)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Predicted disease-specific immune infiltration patterns decode the potential mechanisms of long non-coding RNAs in primary Sjogren's syndrome2021

    • Author(s)
      Caiqi Cheng, Jun Zhou, Ruiying Chen, Yo Shibata, Reina Tanaka, Jun Wang, Jiaming Zhang
    • Journal Title

      Frontiers in Immunology

      Volume: 12 Pages: 1-12

    • DOI

      10.3389/fimmu.2021.624614

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Quantitative/qualitative analysis of adhesive-dentin interface in the presence of 10-methacryloyloxydecyl dihydrogen phosphate2019

    • Author(s)
      Jun Zhou , Wurihan, Yo Shibata , Reina Tanaka , Zhongpu Zhang , Keke Zheng , Qing Li , Sachiko Ikeda , Ping Gao , Takashi Miyazaki
    • Journal Title

      Journal of the Mechanical Behavior of Biomedical Materials

      Volume: 92 Pages: 71-78

    • DOI

      10.1016/j.jmbbm.2018.12.038

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nanomechanical characterization of time-dependent deformation/recovery on human dentin caused by radiation-induced glycation2019

    • Author(s)
      Tobe Takuma、Shibata Yo、Mochizuki Ayako、Shimomura Naofumi、Zhou Jun、Wurihan、Tanaka Reina、Ikeda Sachiko、Zhang Zhongpu、Li Qing、Inoue Tomio、Miyazaki Takashi
    • Journal Title

      Journal of the Mechanical Behavior of Biomedical Materials

      Volume: 90 Pages: 248-255

    • DOI

      10.1016/j.jmbbm.2018.10.015

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Exceptional contact elasticity of human enamel in nanoindentation test2019

    • Author(s)
      Shimomura Naofumi、Tanaka Reina、Shibata Yo、Zhang Zhongpu、Li Qing、Zhou Jun、Wurihan、Tobe Takuma、Ikeda Sachiko、Yoshikawa Kazuko、Shimada Yukie、Miyazaki Takashi
    • Journal Title

      Dental Materials

      Volume: 35 Issue: 1 Pages: 87-97

    • DOI

      10.1016/j.dental.2018.11.005

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nanoindentation time-dependent deformation/recovery suggestive of methylglyoxal induced glycation in calcified nodules2017

    • Author(s)
      Rodriguez Reena、Yoshimura Kentaro、Shibata Yo、Miyamoto Yoichi、Tanaka Reina、Uyama Risa、Sasa Kiyohito、Suzuki Dai、Miyazaki Takashi、Kamijo Ryutaro
    • Journal Title

      Nanomedicine

      Volume: 13 Issue: 8 Pages: 2545-2553

    • DOI

      10.1016/j.nano.2017.07.003

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 象牙質接着界面の分子構造と力学的性質について2018

    • Author(s)
      周 君,柴田 陽,田中 玲奈,宮﨑 隆
    • Organizer
      第65会昭和大学学士会総会
    • Related Report
      2018 Research-status Report
  • [Presentation] 柴田 陽, 田中 玲奈, 下村 直史, 周 君, 烏 日罕, 宮崎 隆2018

    • Author(s)
      ひずみ速度に依存したエナメル質のナノスケール弾性-塑性挙動
    • Organizer
      日本歯科理工学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 田中 玲奈, 柴田 陽, 宮崎 隆2018

    • Author(s)
      単斜晶アパタイト局所合成によるエナメル質初期齲蝕の再生
    • Organizer
      日本歯科理工学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 高イオン強度溶液を用いたエナメル質の結晶構造解析2017

    • Author(s)
      田中玲奈、柴田 陽、周 君、宮崎 隆
    • Organizer
      平成28年度私立大学戦略的研究基盤形成支援事業公開シンポジウム
    • Place of Presentation
      東京
    • Year and Date
      2017-03-04
    • Related Report
      2016 Research-status Report
  • [Presentation] X線照射を用いた疑似的老化による硬組織の力学的特性2017

    • Author(s)
      戸部 拓馬,柴田 陽,下村 直史,周 君,Wurihan,田中 玲奈,宮﨑 隆
    • Organizer
      平成29年度秋季第70回日本歯科理工学会学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] ヒトエナメル質の応力ひずみ曲線測定に適したナノインデンテーション試験法の検討2017

    • Author(s)
      下村 直史,田中 玲奈,戸部 拓馬,周 君,Wurihan,柴田 陽,島田 幸恵,宮﨑 隆
    • Organizer
      平成29年度秋季第70回日本歯科理工学会学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Nanoindentation Characterization of Regenerated Tooth Enamel.2017

    • Author(s)
      Shibata Y., Tanaka R.,Wurihan, Zhou J., Tobe T., Yamamoto M., and Miyazaki T.
    • Organizer
      7th International Conference on Mechanics of Biomaterials and Tissues
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Stress-strain behavior of bleached enamel stored in a high ionic strength solution2016

    • Author(s)
      Tanaka R., Zhou J., Shibata Y., Miyazaki T.
    • Organizer
      International Dental Materials Congress 2016
    • Place of Presentation
      インドネシア共和国
    • Year and Date
      2016-11-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] エナメル質の新規再石灰化療法2016

    • Author(s)
      田中 玲奈
    • Organizer
      臨床歯科理工学会定時総会
    • Place of Presentation
      東京
    • Year and Date
      2016-06-19
    • Related Report
      2016 Research-status Report
    • Invited

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Published: 2016-04-21   Modified: 2022-01-27  

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