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Development of dental titanium alloys with enhanced antibacterial property

Research Project

Project/Area Number 21K09930
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57040:Regenerative dentistry and dental engineering-related
Research InstitutionTohoku University

Principal Investigator

Takahashi Masatoshi  東北大学, 歯学研究科, 助教 (50400255)

Co-Investigator(Kenkyū-buntansha) 高田 雄京  東北大学, 歯学研究科, 准教授 (10206766)
多田 浩之  東北大学, 歯学研究科, 講師 (70431632)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords制菌性 / チタン合金 / 組織制御 / 金属組織 / 熱処理 / Ti-Ag合金 / バイオフィルム / 歯科用合金 / 歯科インプラント
Outline of Research at the Start

申請者の開発した歯科用Ti-Ag合金は、常在細菌叢に影響を与えずに、材料表面へのバイオフィルム形成を抑制する機能を有する。本研究課題では、(1)様々なTi-x合金の制菌性試験を行い、チタンに制菌性を与える合金化元素のスクリーニングを行う。そして、制菌性を示す合金のぬれ性と自然電位を調べ、(2)制菌のメカニズムを解明し、新たな機能性合金を開発するための基礎を構築する。さらに、Ti-Ag合金をベースに第三元素を添加し、(3)制菌機能を強化したTi-Ag-x合金のインプラント応用の可能性を評価する。

Outline of Final Research Achievements

In this study, we established a technique for controlling the microstructure of titanium alloys through forging and heat treatment. Subsequently, we designed and prototyped Ti-Au, Ti-Cu, Ti-Pt, and Ti-Nb alloys, and through antibiofilm activity testing of these alloys, we identified Nb as a promising additive element for conferring antibiofilm properties to titanium. Furthermore, by designing and prototyping Ti-Ag-Nb ternary alloys and investigating their alloy phases and mechanical properties, we constructed a phase diagram for the Ti-Ag-Nb system and revealed that the α single-phase composition region exhibits superior mechanical properties.

Academic Significance and Societal Importance of the Research Achievements

口腔疾患の多くはバイオフィルム感染症なので、全ての補綴装置にとって制菌性は有益である。本研究成果により、Agだけではなく、Au、Pt、Nbといった元素もチタンに制菌性を与える添加元素であることが明らかになった。この作用を応用することで補綴装置の寿命の延長につながる。また、これらの制菌性添加元素を組み合わせることで機械的性質を強化し、大型の補綴装置にも応用できることを明らかにした。

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 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results)

  • [Journal Article] Mechanical properties of dental Ti-Mn alloys developed for high strength via metastable β phase2024

    • Author(s)
      高橋 正敏、笹崎 浩司、髙田 雄京
    • Journal Title

      THE JOURNAL OF JAPANESE SOCIETY FOR DENTAL MATERIALS AND DEVICES

      Volume: 43 Issue: 1 Pages: 41-47

    • DOI

      10.18939/jsdmd.43.1_41

    • ISSN
      1884-4421, 2188-417X
    • Year and Date
      2024-01-25
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ti-Ag合金の制菌性現象2023

    • Author(s)
      高橋正敏
    • Journal Title

      チタン・Titanium Japan

      Volume: 71 Pages: 42-46

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Development of Ternary Ti-Ag-Cu Alloys with Excellent Mechanical Properties and Antibiofilm Activity2022

    • Author(s)
      Togawa Genichi、Takahashi Masatoshi、Tada Hiroyuki、Takada Yukyo
    • Journal Title

      Materials

      Volume: 15 Issue: 24 Pages: 9011-9011

    • DOI

      10.3390/ma15249011

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanical Properties of Ti-Nb-Cu Alloys for Dental Machining Applications2022

    • Author(s)
      Takahashi Masatoshi、Sato Kotaro、Togawa Genichi、Takada Yukyo
    • Journal Title

      Journal of Functional Biomaterials

      Volume: 13 Issue: 4 Pages: 263-263

    • DOI

      10.3390/jfb13040263

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grindability of Ti-Nb-Cu Alloys for Dental Machining Applications2022

    • Author(s)
      Takahashi Masatoshi、Kikuchi Masafumi、Takada Yukyo
    • Journal Title

      Metals

      Volume: 12 Issue: 5 Pages: 861-861

    • DOI

      10.3390/met12050861

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Ti-Ag-Nb系合金の合金相と機械的性質2023

    • Author(s)
      高橋正敏,戸川元一,伊藤 圭太,新山慎太郎,高田雄京
    • Organizer
      日本歯科理工学会学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] チタンにAu,Cu,Pt,Nbを添加した二元系チタン合金のバイオフィルム形成抑制能2023

    • Author(s)
      高橋正敏,戸川元一,伊藤 圭太,新山慎太郎,高田雄京
    • Organizer
      日本歯科理工学会学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Ti-20%Ag-1~5%Cu合金鋳造体のバイオフィルム形成抑制能2022

    • Author(s)
      戸川元一,高橋正敏,高田雄京
    • Organizer
      日本歯科理工学会学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Ti-Au合金とTi-Cu合金のバイオフィルム形成抑制能2022

    • Author(s)
      高橋正敏,多田浩之,高田雄京
    • Organizer
      第64回歯科基礎医学会学術大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Ti-Pt合金とTi-Nb合金のバイオフィルム形成抑制能2022

    • Author(s)
      高田雄京,多田浩之,高橋正敏
    • Organizer
      第64回歯科基礎医学会学術大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Ti-20%Ag-1~5%Cu合金鋳造体の機械的性質2021

    • Author(s)
      戸川元一,高橋正敏,高田雄京
    • Organizer
      日本歯科理工学会学術講演会
    • Related Report
      2021 Research-status Report

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

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