Quantification of third-body damage and its effect on UHMWPE wear with different types of femoral head
Quantification of third-body damage and its effect on UHMWPE wear with different types of femoral head
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DOI：
10.1302/0301-620x.80b5.8675
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发表时间：
1998-09-01
影响因子：
--
通讯作者：
Fisher, J
中科院分区：
文献类型：
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作者：
Minakawa, H;Stone, MH;Fisher, J
我们检查了翻修手术中取出的不锈钢、钴铬合金、钛和氧化铝以及氧化锆陶瓷股骨头。所有股骨头均与超高分子量聚乙烯（UHMWPE）髋臼杯形成关节连接。我们研究了第三体损伤的模拟和UHMWPE与用于股骨头的各种材料的磨损。使用二维接触式轮廓仪对取出的股骨头表面进行分析。第三体损伤的特征是平均线以上划痕的平均高度（R-pm）。发现氧化铝陶瓷和氧化锆陶瓷回收股骨头的损伤明显较少。在实验室研究中，陶瓷也比金属合金更能抵抗模拟的第三体损伤。我们在简单的配置测试中研究了超高分子量聚乙烯对受损配合面的磨损。受损陶瓷产生的聚乙烯磨损小于受损金属配合面。UHMWPE对受损材料的磨损系数取决于对端面的损坏量（R-p）。我们的研究表明，使用更硬和更耐损伤的陶瓷材料用于股骨头的好处。
We examined stainless-steel, cobalt-chrome, titanium and alumina and zirconia ceramic femoral heads retrieved at revision surgery. All the heads had articulated against ultra-high-molecular-weight-polyethylene (UHMWPE) acetabular cups. We studied the simulation of third-body damage and the wear of UHMWPE against the various materials used for the heads. The surfaces of the retrieved heads were analysed using a two-dimensional contacting profilometer. Third-body damage was characterised by the mean height of the scratches above the mean line (R-pm).The alumina ceramic and zirconia ceramic retrieved heads were found to have significantly less damage. In laboratory studies the ceramics were also more resistant to simulated third-body damage than the metal alloys. We studied the wear of UHMWPE against the damaged counterfaces in simple configuration tests. The damaged ceramics produced less polyethylene wear than the damaged metal counterfaces. The wear factor of UHMWPE against the damaged materials was dependent on the amount of damage to the counterface (R-p). Our study has shown the benefit of using the harder and more damage-resistant ceramic materials for femoral heads.