Effect of gamma irradiation on wear characteristics of UHMWPE for joint prostheses

Takanori Sawano, Teruo Murakami, Yoshinori Sawae

研究成果: ジャーナルへの寄稿記事

抄録

Ultra-high molecular weight polyethylene (UHMWPE) is widely used as a rubbing material for clinical applications in total joint prostheses. Generally, total joint prostheses are sterilized by gamma irradiation. Gamma ray ordinarily does not change the properties of ceramic and metal material, but it is well known that UHMWPE has high sensitivities to gamma irradiation. Gamma irradiation causes crosslinking of UHMWPE, which changes its property from original one. This work shows that gamma irradiation has remarkable effects on the reduction of UHMWPE wear. Gamma irradiation is very useful for reduction of UHMWPE wear. In this experiment, medium gamma irradiation is enough to reduce UHMWPE wear. However, gamma irradiation causes reduction in tensile strength and elongation of UHMWPE. Therefore, we found that optimum point of dose to prevent reduction of mechanical properties and reduce wear. Additionally, we also indicate the wear reduction mechanism of crosslinked UHMWPE.

元の言語英語
ページ(範囲)1760-1765
ページ数6
ジャーナルNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
71
発行部数5
出版物ステータス出版済み - 5 1 2005
外部発表Yes

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Joint prostheses
Ultrahigh molecular weight polyethylenes
Wear of materials
Irradiation
Gamma rays
Crosslinking
Elongation
Tensile strength
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

これを引用

Effect of gamma irradiation on wear characteristics of UHMWPE for joint prostheses. / Sawano, Takanori; Murakami, Teruo; Sawae, Yoshinori.

:: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 巻 71, 番号 5, 01.05.2005, p. 1760-1765.

研究成果: ジャーナルへの寄稿記事

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