Barbour P S, Stone M H, Fisher J
School of Mechanical Engineering, University of Leeds, UK.
Proc Inst Mech Eng H. 2000;214(6):569-76. doi: 10.1243/0954411001535598.
This study validates a hip joint simulator configuration as compared with other machines and clinical wear rates using smooth metal and ceramic femoral heads and ultra-high molecular weight polyethylene (UHMWPE) acetabular cups. Secondly the wear rate of UHMWPE cups is measured in the simulator with deliberately scratched cobalt-chrome heads to represent the type of mild and severe scratch damage found on retrieved heads. Finally, the scratching processes are described and the resulting scratches compared with those found in retrieved cobalt-chrome heads. For smooth cobalt-chrome and zirconia heads the wear rates were found to be statistically similar to other simulator machines and within the normal range found from clinical studies. An increased wear rate was found with cobalt-chrome heads scratched using either the diamond stylus or the bead cobalt-chrome but the greatest increase was with the diamond scratched heads which generated scratches of similar dimensions to those on retrieved heads. A greater than twofold increase in wear rate is reported for these heads when compared with smooth heads. This increased wear rate is, however, still within the limits of data from clinical wear studies.
本研究使用光滑的金属和陶瓷股骨头以及超高分子量聚乙烯（UHMWPE）髋臼杯，验证了一种髋关节模拟器配置与其他机器以及临床磨损率的对比情况。其次，在模拟器中测量UHMWPE杯的磨损率，使用故意刮擦的钴铬合金头来模拟在回收的股骨头中发现的轻度和重度刮擦损伤类型。最后，描述了刮擦过程，并将产生的划痕与回收的钴铬合金头中的划痕进行比较。对于光滑的钴铬合金和氧化锆头，发现其磨损率在统计学上与其他模拟器机器相似，且在临床研究的正常范围内。使用金刚石触针或珠状钴铬合金刮擦的钴铬合金头磨损率增加，但最大的增加是使用金刚石刮擦的头，其产生的划痕尺寸与回收的头上的划痕相似。与光滑头相比，这些头的磨损率报告增加了两倍以上。然而，这种增加的磨损率仍在临床磨损研究数据的范围内。
