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Development of remineralization treatment for root caries using UVA-activated riboflavin to promote collagen crosslinking

Research Project

Project/Area Number 19K21379
Project/Area Number (Other) 18H06291 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0907:Oral science and related fields
Research InstitutionOsaka University

Principal Investigator

Uemura Reo  大阪大学, 歯学部附属病院, 医員 (10823560)

Project Period (FY) 2018-08-24 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords象牙質 / 根面う蝕 / 再石灰化 / 光増感剤 / 歯学 / コラーゲン / う蝕モデル / 架橋結合
Outline of Research at the Start

近年、高齢者の歯の根の虫歯が増加していることが問題となっている。申請者らはこれまでに、眼の病気の治療法の一つとして用いられ始めた、体内に含まれるリボフラビンという物質と、身体に害の少ない領域の紫外線を組み合わせる手法を歯に応用することで、歯の中のコラーゲンの網目構造を密に増やして、歯が溶けることを防ぐという事実を発見した。本研究では、既に虫歯になっている歯にこの手法を応用することに加えて、虫歯予防としてすでに成果のあるフッ素を複合的に作用させることにより、虫歯のさらなる進行を抑制し、かつ再石灰化を目指すという、新しい虫歯予防・治療法の開発を目的としている。

Outline of Final Research Achievements

To assume active root caries, the dentin specimens were obtained from human third molars. Specimens were coated with acid resistant varnish leaving an exposed dentin area. The specimens were immersed in demineralizing solution (acetic acid, pH 5.0) for 3 days, and a demineralized lesion model that mimics dentin root caries was successfully created. We used UVA-activated riboflavin method on the specimens, and immersed it in a remineralized solution at pH7.0. Precipitation of mineralization was detected on a scanning electron microscope image to clarify the difference in the opening degree of the dentin tubules, and for elemental analysis of the precipitated calcified material, it was confirmed that mineralized tissues were containing calcium phosphate as a main component precipitated in the dentin tubules. It suggested that this method promotes remineralization of dentin.

Academic Significance and Societal Importance of the Research Achievements

高齢者の保有歯数の増加に伴い急増している根面う蝕は、広範囲に拡大しやすいため修復操作が困難である。そのため、これからの超高齢社会において、「削って詰める」従来のう蝕治療から、「削らない」う蝕治療へのパラダイムシフトが必須であり、活動製う蝕の再石灰化に重点を置く非切削の治療は極めて重要であると考えられ、溶液にひたし、光照射をして歯質の再石灰化を促す本手法を用いることは画期的な新規手法であると考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Annual Research Report
  • Research Products

    (4 results)

All 2021 2020 2019 2018

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] In-air micro-proton-induced X-ray/gamma-ray emission analysis of the acid resistance of root dentin after applying fluoride-containing materials incorporating calcium2021

    • Author(s)
      Yagi Kyoko, Uemura Reo, Yamamoto Hiroko, Ishimoto Takuya, Naito Katsuaki, Itoh Shousaku, Matsuda Yasuhiro, Okuyama Katsushi, Nakano Takayoshi, Hayashi Mikako
    • Journal Title

      Dental Materials Journal

      Volume: ー

    • NAID

      130008093772

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of avulsed primary incisor in 3-year-old girl with hypophosphatasia who received enzyme replacement therapy2018

    • Author(s)
      Okawa R, Miura J Kokomoto K, Nakano K
    • Journal Title

      Pediatric Dental Journal

      Volume: 28(3) Issue: 1 Pages: 136-140

    • DOI

      10.1038/s41598-018-38137-7

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] リン酸三カルシウム配合フッ化物バーニッシュによる根面象牙質の脱灰抑制効果2020

    • Author(s)
      上村怜央、山本洋子、須崎尚子、内藤克昭、天羽萌、神田ひかる、林美加子
    • Organizer
      日本歯科保存学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] UVA活性リボフラビン処理によるヒト象牙質のう蝕進行抑制効果2019

    • Author(s)
      天羽萌、上村怜央、内藤克昭、三浦治郎、林美加子
    • Organizer
      第151回日本歯科保存学会2019年秋季学術大会
    • Related Report
      2019 Research-status Report

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Published: 2018-08-27   Modified: 2024-03-26  

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