852 微小試験片による抜去人工関節UHMWPEの疲労特性評価(G02-4 バイオエンジニアリング(4),21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Highly crosslinked polyethylene (HXLPE) has been introduced as a new bearing material of artificial joints due to its improved wear property over conventional ultra-high molecular weight polyethylene (UHMWPE). On the other hand, there is a concern over fatigue related failure of the components due its inferior fatigue property. However, relation between the inferior fatigue property and the failure of the components has not been known, since there is no appropriate method to evaluate the fatigue property of retrieved components. In this study, we developed a new test method to evaluate the fatigue property of UHMWPE for retrieved implants. Reduction in fatigue properties has been found to have direct relation to the extent of the oxidative degradation and the occurrence of delamination.
社団法人日本機械学会の論文
2008-08-02