Hamilton William G, Hopper Robert H, Ginn Stuart D, Hammell Neil P, Engh C Anderson, Engh Charles A
Anderson Orthopaedic Research Institute, Alexandria, Virginia 22307, USA.
J Arthroplasty. 2005 Oct;20(7 Suppl 3):63-72. doi: 10.1016/j.arth.2005.05.007.
Using 743 total hip arthroplasties that included 6 hemispheric porous-coated cup designs, this study used a multiple linear regression to identify those factors that influenced polyethylene wear rates. Wear rates for each hip were based on serial head penetration measurement made with computer-assisted techniques. Implant factors associated with an increased wear rate included terminal sterilization with a non-cross-linking chemical surface treatment, a 4-mm lateralized liner, a cobalt-chrome femoral head, and a longer shelf life for liners gamma-irradiated in air. After accounting for these implant characteristics and patient factors, wear rates among the 6 cup designs were not significantly different (P = .89). Although polyethylene wear is frequently characterized for specific implant designs, this study demonstrated that there are several common factors that influence polyethylene wear rates.
本研究使用了743例全髋关节置换术，其中包括6种半球形多孔涂层髋臼杯设计，采用多元线性回归来确定那些影响聚乙烯磨损率的因素。每个髋关节的磨损率基于计算机辅助技术进行的连续股骨头穿透测量。与磨损率增加相关的植入物因素包括采用非交联化学表面处理的终端灭菌、4毫米侧移内衬、钴铬合金股骨头以及在空气中进行伽马射线辐照的内衬更长的保质期。在考虑了这些植入物特征和患者因素后，6种髋臼杯设计的磨损率没有显著差异（P = 0.89）。尽管聚乙烯磨损通常针对特定的植入物设计进行描述，但本研究表明，有几个共同因素会影响聚乙烯磨损率。
