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Fundamental research on surface charge-controlled bioactive implants for clinical application

Research Project

Project/Area Number 20K10050
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

Ueno Takeshi  東京医科歯科大学, 大学院医歯学総合研究科, 准教授 (30359674)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsチタン / インプラント / 骨芽細胞 / 表面電荷 / リチウムイオン / ゼータ電位 / タンパク吸着 / 生体親和性
Outline of Research at the Start

インプラント表面における表面電荷は、生体親和性に影響する重要な物理化学的特性のひとつである。生体内のpHにおいて、チタン表面は負に帯電している一方、細胞接着タンパクや細胞膜も負電荷であることから、両者に電気的な相互作用はない。本研究の目的は、チタンの表面電荷に着目し、これを実験的に変化させ、生物学的活性への影響を明らかにすることである。すでに先行研究において、Liイオンコーティングによって表面電荷を正方向にシフトさせ、これによりタンパク吸着が増加することを報告している。本研究は、技術の実用化のために、チタン表面電荷の細胞レベルでの効果、さらに生体レベルでの効果を評価していく。

Outline of Final Research Achievements

Promoting osseointegration is an essential step in improving implant success rates.The incorporation of lithium ion into a titanium surface has been reported to change its surface charge, thereby enhancing its biocompatibility. In this study, we applied anodization as a novel approach to immobilize Li on a titanium surface and evaluated the changes in its surface characteristics. The objective of this study was to determine the effect of Li treatment of titanium on typical proteins in terms of their adsorption level, as well as on the attachment of osteoblasts cells. The adsorption level of extracellular matrix protein was enhanced on the Li-treated surface. The number of attached cells also increased. This study suggests that anodization could be an effective method to immobilize lithium ions on a titanium surface and that modifying the surface charge characteristics enables a direct protein-to-material interaction with enhanced biological adhesion.

Academic Significance and Societal Importance of the Research Achievements

チタンは元々生体親和性の高い材料であることが知られているが、実際の骨-チタン接触率は、長期の治癒時間 を待っても30-60%程度であることが報告されており、この生体の反応に幅があることについての要因を提示し た研究は少ない。本研究はまずチタンの生体親和性を向上させる新しい方法を提案した。本研究の方法は、従来からある技術を応用したものであり、その有用性は高いと考えられる。得られた結果は、インプラント表面の性能を、現状よりも向上させられる可能性があることを示唆しており、今後他の物理化学的因子を検討することで、表面処理方法の最適化への発展に寄与できると考えられる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2023 2022 2021

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

  • [Journal Article] Lithium-Modified TiO<sub>2</sub> Surface by Anodization for Enhanced Protein Adsorption and Cell Adhesion2023

    • Author(s)
      Wu Huaze、Ueno Takeshi、Nozaki Kosuke、Xu Huichuan、Nakano Yuki、Chen Peng、Wakabayashi Noriyuki
    • Journal Title

      ACS Applied Materials &amp; Interfaces

      Volume: 15 Issue: 48 Pages: 55232-55243

    • DOI

      10.1021/acsami.3c06749

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A review in titanium-zirconium binary alloy for use in dental implants: Is there an ideal Ti-Zr composing ratio?2023

    • Author(s)
      Zhao Qian、Ueno Takeshi、Wakabayashi Noriyuki
    • Journal Title

      Japanese Dental Science Review

      Volume: 59 Pages: 28-37

    • DOI

      10.1016/j.jdsr.2023.01.002

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Surface properties and biocompatibility of sandblasted and acid-etched titanium–zirconium binary alloys with various compositions2022

    • Author(s)
      TAN Tianbo、ZHAO Qian、KUWAE Hiroyuki、UENO Takeshi、CHEN Peng、TSUTSUMI Yusuke、MIZUNO Jun、HANAWA Takao、WAKABAYASHI Noriyuki
    • Journal Title

      Dental Materials Journal

      Volume: 41 Issue: 2 Pages: 266-272

    • DOI

      10.4012/dmj.2021-210

    • NAID

      130008124752

    • ISSN
      0287-4547, 1881-1361
    • Year and Date
      2022-03-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fabrication of micro-/submicro-/nanostructured surfaces on Ti?Zr alloy by varying H2SO4/H2O2 treatment conditions and investigations of fundamental properties of a typical surface2022

    • Author(s)
      Zhao Qian、Ueno Takeshi、Chen Peng、Nozaki Kosuke、Tan Tianbo、Hanawa Takao、Wakabayashi Noriyuki
    • Journal Title

      Surfaces and Interfaces

      Volume: 34 Pages: 102390-102390

    • DOI

      10.1016/j.surfin.2022.102390

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ultraviolet Treatment of Titanium to Enhance Adhesion and Retention of Oral Mucosa Connective Tissue and Fibroblasts2021

    • Author(s)
      Ikeda Takayuki、Ueno Takeshi、Saruta Juri、Hirota Makoto、Park Wonhee、Ogawa Takahiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 22 Pages: 12396-12396

    • DOI

      10.3390/ijms222212396

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Lithium-immobilized titanium surface by anodization with enhanced biological activity .2023

    • Author(s)
      Wu Haze, Ueno Takeshi, Xu Huichuan, Nozaki Kosuke, Wkabayashi Noriyuki.
    • Organizer
      The 2023 AADOCR/CADR Annual Meeting & Exhibition
    • Related Report
      2023 Annual Research Report
  • [Presentation] Modified-Glutathione coating immobilized on titanium surface enhances its biocompatibility.2023

    • Author(s)
      Xu Huichuan, Ueno Takeshi, Wu Haze, Nozaki Kosuke, Wkabayashi Noriyuk
    • Organizer
      The 2023 AADOCR/CADR Annual Meeting & Exhibition
    • Related Report
      2023 Annual Research Report
  • [Presentation] Lithium-immobilized titanium surface by anodization with enhanced biological activity2023

    • Author(s)
      Wu Huaze, Ueno Takeshi, Xu Huichuan, Nozaki Kosuke, Wkabayashi Noriyuki
    • Organizer
      The 2023 AADOCR/CADR Annual Meeting & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Modified-Glutathione coating immobilized on titanium surface enhances its biocompatibility2023

    • Author(s)
      Xu Huichuan, Ueno Takeshi, Wu Huaze, Nozaki Kosuke, Wkabayashi Noriyuki
    • Organizer
      The 2023 AADOCR/CADR Annual Meeting & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] H2SO4/H2O2処理によるTi-Zr合金のマイクロ/サブマイクロ/ナノ表面の作製2021

    • Author(s)
      趙 茜, 上野 剛史, 若林 則幸
    • Organizer
      日本補綴学歯科学会東京支部会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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