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Femoral component wear in retrieved hip prostheses
1Department of Orthopaedic Surgery, Showa University Fujigaoka Hospital, Yokohama, Japan.
The Journal of Bone and Joint Surgery. British Volume
|March 1, 1997
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.