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Research

FEMORAL COMPONENT WEAR IN RETRIEVED HIP PROSTHESES



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Abstract

We retrieved 159 femoral heads at revision surgery to determine changes in surface configuration. Macroscopic wear of the head was observed in three bipolar hip prostheses as a result of three-body wear. There was a considerable change in surface roughness in the internal articulation of bipolar hip prostheses. Roughness in alumina heads was almost the same as that in new cobalt-chromium heads. The annual linear wear rate of polyethylene cups with alumina heads was less than that of cups with cobalt-chromium alloy heads. Polyethylene wear was increased in the prostheses which had increased roughness of the head.


Correspondence should be sent to Dr A. Kusaba at 824-9 Kamoshida-Cho, Aoba-Ku, Yokohama 227, Japan.

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