Tanaka K, Tamura J, Kawanabe K, Shimizu M, Nakamura T
Department of Orthopaedic Surgery, Faculty of Medicine, Kyoto University, Japan.
J Bone Joint Surg Br. 2003 Jul;85(5):655-60.
We examined the behaviour of alumina ceramic heads in 156 cemented total hip arthroplasties, at a minimum follow-up of eight years. They were divided into three groups according to the size of the femoral head; 22, 26, and 28 mm. We measured polyethylene wear radiologically using a computer-aided technique. The linear wear rate of polyethylene sockets for the 28 mm heads was high (0.156 mm/year), whereas those for the 22 and 26 mm heads were relatively low (0.090 and 0.098 mm/year, respectively). Moreover, the surface roughness data of retrieved femoral heads clearly showed maintenance of an excellent surface finish of the current alumina. We conclude that the alumina ceramic femoral heads currently used are associated with a reduced rate of polyethylene wear.
我们对156例骨水泥型全髋关节置换术中的氧化铝陶瓷股骨头进行了研究，随访时间至少为8年。根据股骨头大小将其分为三组，分别为22毫米、26毫米和28毫米。我们采用计算机辅助技术通过影像学测量聚乙烯磨损情况。28毫米股骨头的聚乙烯髋臼杯线性磨损率较高（0.156毫米/年），而22毫米和26毫米股骨头的磨损率相对较低（分别为0.090毫米/年和0.098毫米/年）。此外，回收股骨头的表面粗糙度数据清楚地表明，目前的氧化铝材料能很好地维持表面光洁度。我们得出结论，目前使用的氧化铝陶瓷股骨头与聚乙烯磨损率降低有关。
