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Stress-strain response under spherical nanoindentation of tooth enamel

Research Project

Project/Area Number 25861808
Research Category

Grant-in-Aid for Young Scientists (B)

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

Principal Investigator

OGINO REINA  昭和大学, 歯学部, 助教 (80585779)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsエナメル質 / 物性 / 応力ひずみ曲線 / オフィスホワイトニング / ナノインデンテーション / エナメル小柱 / 球状圧子
Outline of Final Research Achievements

The aim of this study was to investigate the mechanical properties of bleached enamel and obtain stress-strain curves using spherical nanoindentation. Based on the hierarchical structure, nanoscale analysis is critical for the measurement of enamel crystals mechanical property. The stress-strain curves were obtained for the conical indenters for fused quartz and untreated enamel. The continuous stress-strain curves were measurable for untreated and in-office bleached (35 % hydrogen peroxide with halogen lamp irradiation 3 minutes x 3 times ; OB) enamel. The yield force was observed clearly in enamel stress-strain curves. The analysis of data obtained from partial unloading method with conical indenter tip revealed the stress-strain response by nanoindentation of enamel crystals without the effect of enamel sheath protein so that nanoscale mechanical properties on enamels with or without OB were comparable at material level.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (9 results)

All 2015 2014 2013

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Nanomechanical properties and molecular structures of in vitro mineralized tissues on anodically oxidized titanium surfaces.2014

    • Author(s)
      Jang, I-. K., Tanaka, R., Wurihan, Suzuki, D., Shibata Y., Fujisawa, N., Tanimoto, Y., Ogura, K., Kamijo, R., Miyazaki, T.
    • Journal Title

      Nanomedicine

      Volume: 10 Issue: 3 Pages: 629-637

    • DOI

      10.1016/j.nano.2013.09.007

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] In vitro demineralization of tooth enamel subjected to two whitening regimes.2013

    • Author(s)
      Ogura K., Tanaka R., Shibata Y., Miyazaki T., Hisamitsu H.
    • Journal Title

      Journal of the American Dental Association

      Volume: 144 Issue: 7 Pages: 799-807

    • DOI

      10.14219/jada.archive.2013.0190

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Stress-strain response under spherical nanoindentation of bleached tooth enamel2015

    • Author(s)
      R. TANAKA, Y. SHIBATA, T. MIYAZAKI
    • Organizer
      6th International Conference on Mechanics of Biomaterials and Tissue
    • Place of Presentation
      アメリカ合衆国
    • Year and Date
      2015-12-10
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ナノインデンテーション法による漂白エナメル質の物性解析2015

    • Author(s)
      田中 玲奈 柴田 陽 糸瀬 明希 宮﨑 隆
    • Organizer
      日本歯科理工学会第66回秋季学術講演会
    • Place of Presentation
      タワーホール船堀
    • Year and Date
      2015-10-03
    • Related Report
      2015 Annual Research Report
  • [Presentation] 球状圧子を用いたナノインデンテーションによるエナメル質の応力ひずみ特性2015

    • Author(s)
      田中 玲奈 柴田 陽 宮﨑 隆
    • Organizer
      日本歯科理工学会第65回春季学術講演会
    • Place of Presentation
      仙台市情報・産業プラザ
    • Year and Date
      2015-04-11
    • Related Report
      2015 Annual Research Report
  • [Presentation] 二種類のホワイト二ング処理によるエナメル質の耐酸性2014

    • Author(s)
      田中 玲奈,真鍋 厚史,宮﨑 隆
    • Organizer
      第140回日本歯科保存学会2014年度春季学術大会
    • Place of Presentation
      びわ湖ホール
    • Year and Date
      2014-06-19 – 2014-06-20
    • Related Report
      2014 Research-status Report
  • [Presentation] 準静的・動的ナノインデンテーションによるエナメル質のひずみ依存剛性2014

    • Author(s)
      田中 玲奈 柴田 陽 宮崎 隆
    • Organizer
      平成24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
      昭和大学
    • Related Report
      2013 Research-status Report
  • [Presentation] エナメル小柱の準静的および動的物性評価2013

    • Author(s)
      田中 玲奈, 真鍋厚史, 宮崎 隆
    • Organizer
      第138回日本歯科保存学会2013年度春季学術大会
    • Place of Presentation
      福岡
    • Related Report
      2013 Research-status Report
  • [Patent(Industrial Property Rights)] エナメル質石灰化促進セット2014

    • Inventor(s)
      宮崎 隆、柴田 陽、田中 玲奈、薗井 秀次、繁澤 麻紗子
    • Industrial Property Rights Holder
      学校法人昭和大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2014-10-20
    • Acquisition Date
      2014-11-28
    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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