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Effects of reducing stress shielding and fracture healing acceleration by orthopaedic implants of TiNbSn alloy with low Young's modulus

Research Project

Project/Area Number 18K09052
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionTohoku University

Principal Investigator

Mori Yu  東北大学, 大学病院, 助教 (70634541)

Co-Investigator(Kenkyū-buntansha) 花田 修治  東北大学, 金属材料研究所, 名誉教授 (10005960)
正橋 直哉  東北大学, 金属材料研究所, 教授 (20312639)
森 菜緒子  東北大学, 大学病院, 助教 (90535064)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords低弾性率チタン合金 / 応力遮蔽 / 骨癒合促進 / 人工関節 / 骨折治療プレート / TiNbSn合金 / 応力遮蔽抑制 / 整形外科インプラント / 人工股関節置換術 / 骨折治癒 / 低弾性チタン合金
Outline of Final Research Achievements

The suppression effect of stress shielding was investigated in an experimental hip joint prosthesis model using a low elastic modulus titanium alloy TiNbSn. Finite element analysis confirmed the improvement of load-stress imbalance, and the suppression of bone atrophy in the canine low elastic modulus titanium alloy artificial hip joint model was clarified. We also investigated the effect of low modulus titanium alloy TiNbSn on promoting bone healing by making a metal plate and examining CT images of actual bone tissue, hard tissue specimens, and bone strength after healing in a rabbit tibial osteotomy model. The effect of TiNbSn alloy on early bone healing and improvement of bone strength after healing was confirmed in comparison with Ti6Al4V alloy.

Academic Significance and Societal Importance of the Research Achievements

従来のTi6Al4V合金は高強度、高耐久性、毒性・アレルギー性の排除を満たした優れた整形外科インプラントの金属材料ではあるが、弾性率が110GPaと骨皮質(10~30GPa)に比べて高弾性率であり、皮質骨との弾性率の乖離が問題となる。その結果引き起こされる応力遮蔽による骨癒合の遷延や、手術後の大腿部痛、骨萎縮は深刻な臨床的問題である。我々が開発したTiNbSn合金は45GPaの低弾性チタン合金であり、加熱処理により強度を加工できる優れた新規材料である。本研究の成果から低弾性率チタン合金TiNbSn人工関節と骨折治療プレートの応力遮蔽の解消効果と骨折部の骨癒合促進効果の可能性が示された。

Report

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

    (10 results)

All 2021 2019 2018

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

  • [Journal Article] Photoactivity of an anodized biocompatible TiNbSn alloy prepared in sodium tartrate / hydrogen peroxide aqueous solution2021

    • Author(s)
      N. Masahashi, Y Mori, H. Kurishima, H. Inoue, T. Mokudai, S. Semboshi, M. Hatakeyama, E. Itoi, S. Hanada
    • Journal Title

      Applied Surface Science

      Volume: 543 Pages: 1488291-11

    • DOI

      10.1016/j.apsusc.2020.148829

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Improved Osseointegration of a TiNbSn Alloy with a Low Young’s Modulus Treated with Anodic Oxidation2019

    • Author(s)
      Kunii Tomonori、Mori Yu、Tanaka Hidetatsu、Kogure Atsushi、Kamimura Masayuki、Mori Naoko、Hanada Shuji、Masahashi Naoya、Itoi Eiji
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 13985-13985

    • DOI

      10.1038/s41598-019-50581-7

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bioactive TiNbSn alloy prepared by anodization in sulfuric acid electrolytes2019

    • Author(s)
      N. Masahashi, Y. Mori, H. Tanaka, A. Kogure, H. Inoue, K. Ohmura, Y. Kodama , M. Nishijima, E. Itoi, and S. Hanada
    • Journal Title

      Materials Science and Engineering C-Materials for Biological Applications

      Volume: 98 Pages: 753-763

    • DOI

      10.1016/j.msec.2019.01.033

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of elastic intramedullary nails composed of low Young's modulus Ti-Nb-Sn alloy on healing of tibial osteotomies in rabbits2018

    • Author(s)
      Kogure Atsushi、Mori Yu、Tanaka Hidetatsu、Kamimura Masayuki、Masahashi Naoya、Hanada Shuji、Itoi Eiji
    • Journal Title

      Journal of Biomedical Materials Research Part B: Applied Biomaterials

      Volume: 107 Issue: 3 Pages: 700-707

    • DOI

      10.1002/jbm.b.34163

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effects of intramedullary nails composed of a new β-type Ti-Nb-Sn alloy with low Young's modulus on fracture healing in mouse tibiae2018

    • Author(s)
      Fujisawa Hirokazu、Mori Yu、Kogure Atsushi、Tanaka Hidetatsu、Kamimura Masayuki、Masahashi Naoya、Hanada Shuji、Itoi Eiji
    • Journal Title

      J Biomed Mat Res B Appl Biomater

      Volume: - Issue: 8 Pages: 2841-2848

    • DOI

      10.1002/jbm.b.34064

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] The antibacterial activity of anodized biocompatible TiNbSn alloy prepared in sodium tartrate2021

    • Author(s)
      Hiroaki Kurishima, Yu Mori, Naoya Masahashi, Keiko Ishii3, Hiroshi Inoue, Takayuki Mokudai, Shuji Hanada, Kazuyoshi Kawakami, Eiji Itoi
    • Organizer
      2021 Orthopaedic Research Society Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of Elastic Plate of Low Young's Modulus Ti-Nb-Sn-alloy on Bone Healing2021

    • Author(s)
      Kentaro Ito, Yu Mori, Tomonori Kunii, Hiroaki Kurishima, Masashi Koguchi, Satoko Fujimori, Masayuki Kamimura, Naoya Masahashi, Shuji Hanada, Eiji Itoi
    • Organizer
      2021 Orthopaedic Research Society Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 硫酸陽極酸化を行った低弾性Ti-Nb-Sn合金の骨伝導能2019

    • Author(s)
      國井知典、森優、田中秀達、正橋直哉、花田修治、井樋栄二
    • Organizer
      第34回日本整形外科学会基礎学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Improved Osseointegration of a TiNbSn Alloy with a Low Young’s Modulus Treated with Anodic Oxidation.2019

    • Author(s)
      Kunii T, Mori Y, Tanaka H, Kogure A, Masahashi N, Itoi E
    • Organizer
      2019 ORS annual meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 硫酸陽極酸化を行った低弾性 Ti-Nb-Sn 合金の表面解析2018

    • Author(s)
      國井知典 森優 小暮敦史 田中秀達 正橋直哉 花田修治 井樋栄二
    • Organizer
      第33回日本整形外科学会基礎学術集会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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