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Development of innovative zirconia artificial bones

Research Project

Project/Area Number 22K19911
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 90:Biomedical engineering and related fields
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Yokoi Taishi  東京医科歯科大学, 生体材料工学研究所, 准教授 (00706781)

Co-Investigator(Kenkyū-buntansha) 川下 将一  東京医科歯科大学, 生体材料工学研究所, 教授 (70314234)
陳 鵬  東北大学, 歯学研究科, 助教 (70708388)
Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords人工骨 / ジルコニア / 靭性 / 骨修復材料 / 高靭性 / リン酸八カルシウム / アパタイト / 損傷許容性
Outline of Research at the Start

セラミック生体材料分野における材料の研究・開発はリン酸カルシウム系材料を中心に進められてきた。これに対して“骨結合性を有する超高靭性ジルコニア系材料”という新しい材料研究分野の形成を目指し、本研究ではアパタイト/熱分解カーボン複合粉末のジルコニアへの添加量と焼結条件を最適化し、擬似体液を用いた骨結合性評価ならびに作製した材料の機械的特性評価を通じて、骨結合性と超高靭性を発現する革新的ジルコニア人工骨の開発を目指す。

Outline of Final Research Achievements

Although zirconia has excellent mechanical properties, it cannot be used as an artificial bone because it does not have bone-binding properties. On the other hand, calcium phosphates have inferior mechanical properties to zirconia, but have bone-binding properties and are therefore used clinically as an artificial bone.
In this study, we aimed to develop an innovative zirconia-based artificial bone that combines the advantages of both zirconia and calcium phosphates. The material made by mixing powder made from carboxylate-containing octacalcium phosphate with zirconia and sintering the mixture was found to strongly inhibit the propagation of cracks. In addition, it was demonstrated that the material has strength three times that of conventional calcium phosphate, and the design guidelines for next-generation artificial bones were successfully established.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた材料は、次世代の人工骨として利用できるだけでなく、人工歯根としても利用できる可能性がある。これらの材料は健康寿命の延伸とWell-beingを支える医療用材料であり、超高齢社会を迎えた日本において大きな意味を持つ材料であると言える。
加えて、本研究で得られた材料中におけるき裂進展抑制のメカニズムは、他のセラミックスにも応用できると期待され、セラミックスの弱点であった脆性を根本的に解決する材料設計として広く活用されることが強く期待される。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (3 results)

All 2024 2023 2022

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Development of bioinspired damage-tolerant calcium phosphate bulk materials2023

    • Author(s)
      Kuroyama Karen、Fujikawa Ryuichi、Goto Tomoyo、Sekino Tohru、Nakamura Fumiya、Kimura-Suda Hiromi、Chen Peng、Kanetaka Hiroyasu、Hasegawa Tomoka、Yoshida Kaname、Murata Masaru、Nakata Hidemi、Shimabukuro Masaya、Kawashita Masakazu、Yoda Tetsuya、Yokoi Taishi
    • Journal Title

      Science and Technology of Advanced Materials

      Volume: 24 Issue: 1 Pages: 2261836-2261836

    • DOI

      10.1080/14686996.2023.2261836

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synthesis of Octacalcium Phosphate Containing Glutarate Ions with a High Incorporation Fraction2022

    • Author(s)
      Yokoi Taishi、Watanabe Masahiro、Goto Tomoyo、Meng Sikun、Sekino Tohru、Shimabukuro Masaya、Kawashita Masakazu
    • Journal Title

      Materials

      Volume: 16 Issue: 1 Pages: 64-64

    • DOI

      10.3390/ma16010064

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Patent(Industrial Property Rights)] リン酸カルシウム-炭素原子-酸化ジルコニウム複合体,修復材料,医療機器,リン酸カルシウム-炭素原子-酸化ジルコニウム複合体の製造方法2024

    • Inventor(s)
      横井太史,川下将一,陳鵬,金髙弘恭,後藤知代,関野徹
    • Industrial Property Rights Holder
      横井太史,川下将一,陳鵬,金髙弘恭,後藤知代,関野徹
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2024-050521
    • Filing Date
      2024
    • Related Report
      2023 Annual Research Report

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Published: 2022-07-05   Modified: 2025-01-30  

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