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A contribution to the aging society by developing next generation implants using additive manufacturing

Research Project

Project/Area Number 19K10235
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionThe Nippon Dental University (2022-2024)
The Nippon Dental University College at Tokyo (2019-2021)

Principal Investigator

KOIKE MARI  日本歯科大学, 生命歯学部, 准教授 (00234667)

Co-Investigator(Kenkyū-buntansha) 堀江 哲郎  日本歯科大学, 生命歯学部, 講師 (10508675)
Project Period (FY) 2019-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
KeywordsAdditive Manufacturing / チタン合金 / 歯科用インプラント / 機械的性質 / 生体親和性 / 細胞毒性 / 機械的特性 / 金属粉末積層造形法 / インプラント / インプラント体 / 粉末積層造形法 / 表面性状
Outline of Research at the Start

粉末積層造形法を用いたTi合金やCo-Cr合金製品の優れた特性により,人工骨やインプラントの生体材料としての適用が期待される.しかし,従来の金属生体材料の弾性率は生体骨の弾性率より高いため,埋入後の破折の一因となる.この技術を応用すると金属生体材料の弾性率が調節でき破折が防止できるが,完成体表面の粗造化で生体骨との結合性低下が懸念される.そこで,粉末積層造形法で特性を調整し,同素材の均一な繊維や粉末を表面に焼結加工で被覆することで,生体環境に最適な弾性率と表面粗さの両者を備えた格子状金属生体材料の新たな開発は,その臨床応用を可能にし,長寿社会の再生医療への貢献と医療費抑制に繋げることになる.

Outline of Final Research Achievements

This study was aimed at the surface property and a design and the clinical application of the implant with the strength to fit the living body using additive manufacturing which could make custom maid devices. Samples with the lattice structure on the surface using Ti-6Al-4V ELI alloy were fabricated, and the effects of structure were evaluated using mechanical properties, bacteria adhesion and cytotoxicity (ISO 6892, 10993-5). There was no influence on strength by the lattice structure, but some decrease of elongation. Bacteria adhesion to the lattice structure did not show increase compared to that of solid surface. The lattice structure on the surface would maintain the activity of the cell by decreasing the contact area with the cell.
Thus, the characteristics of implants with lattice structure on the surface meets the ISO standards and would be useful as the dental application.

Academic Significance and Societal Importance of the Research Achievements

Additive Manufacturingによってカスタムメイドのインプラント体を製作することは,生体材料を用いて最適なサイズと形状を備えたインプラント体の提供が可能となり,インプラント体の寿命の延長に確実に繋がると自負している.さらに,この技術の確立は,コストの大幅な削減と納期の短期化が実現できることで医療費の削減と患者が医療機関へ通院する期間と回数の軽減も可能となる.

Report

(7 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2025 2024 2023 2022 2021 2020 2019

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results)

  • [Journal Article] Present Status of the Effectiveness of the Patch Test Reagent for Titanium Hypersensitivity2023

    • Author(s)
      Koike M, Hummel SK, Hiraba H, Shimoe S.
    • Journal Title

      The Journal of Dentists

      Volume: 11 Pages: 45-55

    • DOI

      10.12974/2311-8695.2023.11.07

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Candida Albicans Biofilm Formation on an Additive-Manufactured Titanium Alloy2023

    • Author(s)
      Mari Koike, Tetsuro Horie, Susan K. Hummel, Richard J. Mitchell, Toru Okabe
    • Journal Title

      TMS 2023 152nd Annual Meeting & Exhibition Supplemental Proceedings

      Volume: 152 Pages: 243-259

    • DOI

      10.1007/978-3-031-22524-6_23

    • ISBN
      9783031225239, 9783031225246
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Biofilm accumulation on additive manufactured Ti-6Al-4V alloy surfaces2022

    • Author(s)
      Mari Koike, Richard J. Mitchell, Tetsuro Horie, Susan K. Hummel, Toru Okabe
    • Journal Title

      Journal of Oral Science

      Volume: 64 Issue: 2 Pages: 139-144

    • DOI

      10.2334/josnusd.21-0521

    • ISSN
      1343-4934, 1880-4926
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] EBSD for Microstructural Analysis of Additive Manufactured and Cast Titanium-Alloy2025

    • Author(s)
      Koike M, Hummel KS, Okamoto H, Nakajima R, Terabe Y, Okabe T
    • Organizer
      IADR/AADOCR General Session &Exhibition
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Surface Morphologies on an Additive-Manufactured Titanium Alloy for Biofilm Formation2024

    • Author(s)
      Koike M, Hummel SK, Mitchell RJ, Okabe T
    • Organizer
      2024 IADR/AADOCR/CADR General Session & Exhibition
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Biofilm on the Ti-6Al-4V Alloy Fabricated with Additive Manufacturing2023

    • Author(s)
      Mari Koike, Toru Okabe
    • Organizer
      Annual World Congress of Smart Materials
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Cytotoxicity of Titanium Alloys with Lattice Structure Fabricated using Additive-Layer-Manufacturing2023

    • Author(s)
      Mari Koike, Tetsuro Horie, Susan K. Hummel, Richard J. Mitchell, Toru Okabe
    • Organizer
      2023 AADOCR/CADR Annual Meeting & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Biofilm Formation of Candida albicans on an Additive-Manufactured Titanium Alloy2023

    • Author(s)
      Mari Koike, Tetsuro Horie, Susan K. Hummel, Richard J. Mitchell, Toru Okabe
    • Organizer
      TMS 2023 Annual Meeting & Exhibition
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mechanical properties of additive manufactured lattice-framework-covered Ti alloys2021

    • Author(s)
      Mari Koike, Tomita, Atsushi,Susan K. Hummel, Richard J. Mitchell, Toru Okabe
    • Organizer
      2021 IADR/AADR/CADR General Session
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 積層造形法で作製したチタンの生体親和性ーISO10993-5 細胞毒性試験による評価ー2020

    • Author(s)
      小池麻里
    • Organizer
      第93回レアメタル研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] Candida albicans Biofilm Formation on an Additively-Manufactured Titanium Alloy2020

    • Author(s)
      Koike M, Horie T, Hummel SK, Mitchell RJ, Okabe T
    • Organizer
      the 2020 IADR/AADR/CADR General Session
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Cytotoxisity of Titanium Alloys Fabricated with Additive-Layer-Manufacturing.2019

    • Author(s)
      Koike M, Horie T, Hummel SK, Mitchell RJ, Okabe T
    • Organizer
      the 202019 IADR General Session
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2026-01-16  

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