Cooper J R, Dowson D, Fisher J, Jobbins B
Department of Mechanical Engineering, University of Leeds, UK.
J Med Eng Technol. 1991 Mar-Apr;15(2):63-7. doi: 10.3109/03091909109009970.
Studies of explanted Charnley hip prostheses have shown damage or scratching of the polished stainless steel femoral heads. This surface damage is probably due to third body wear by bone cement particles. Damaged femoral heads will produce increased wear rates of ultra high molecular weight polyethylene (UHMWPE) acetabular cups. Sliding wear tests carried out in the laboratory have shown that alumina ceramic counterfaces are more resistant to third body damage from bone cement particles than stainless steel counterfaces. The use of the ceramic femoral heads in artificial hip joints will help to preserve the smooth surface finish on the femoral bearing surface, which is necessary to ensure low wear rates of the UHMWPE cup throughout the lifetime of the prosthesis.
对取出的Charnley髋关节假体的研究表明，抛光的不锈钢股骨头存在损伤或划痕。这种表面损伤可能是由于骨水泥颗粒的三体磨损造成的。受损的股骨头会使超高分子量聚乙烯（UHMWPE）髋臼杯的磨损率增加。实验室进行的滑动磨损试验表明，氧化铝陶瓷配对表面比不锈钢配对表面更能抵抗骨水泥颗粒的三体损伤。在人工髋关节中使用陶瓷股骨头将有助于保持股骨支承表面的光滑光洁度，这对于确保假体整个使用寿命期间UHMWPE杯的低磨损率是必要的。
