552 潤滑液曝露時間による人工関節材料の摩耗変化(S09-4 関節のバイオメカニズム(4),S09 関節のバイオメカニズム)

概要

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To be able to predict the level of wear of ultrahigh-molecular-weight polyethylene (UHMWPE) in joint prostheses is important, because osteolysis is induced by the wear particles. This also causes long-term failure in total joint replacement. It is generally agreed that contact pressure and sliding speed are the predominant factors for the prediction of wear of UHMWPE. A new parameter for predicting the wear of UHMWPE has been introduced with a wear test in vitro. The parameter is the exposure time to a lubricating liquid on a bearing surface. A pin-on-disc machine was designed such that the exposure time of a disc to a lubricating liquid could be varied. The wear rate of UHMWPE was increased by a decrease in the exposure time, even if the sliding pattern was changed. The parameter clarifies the conditions under which the wear rate of UHMWPE is found to be high, and effectiveness of this parameter is discussed.
一般社団法人日本機械学会の論文
2006-09-15