Garcia Ryan M, Kraay Matthew J, Messerschmitt Patrick J, Goldberg Victor M, Rimnac Clare M
Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Ohio, USA.
J Arthroplasty. 2009 Jan;24(1):131-8. doi: 10.1016/j.arth.2008.01.003. Epub 2008 Nov 1.
Mobile-bearing total knee Arthroplasties (TKAs) were designed to increase conformity, decrease contact stresses, and decrease polyethylene damage. Our objective was to evaluate the performance of retrieved mobile-bearing TKAs with respect to wear damage of the polyethylene in a series of components obtained at revision surgery. Tibial component polyethylene superior and inferior surface damage and radiographic radiolucency analysis was conducted on 40 retrieved mobile-bearing TKAs. Higher levels of superior articulating surface damage were found to be associated with higher levels of inferior surface damage in this retrieval study. Greater levels of damage were present on both surfaces in components with greater radiographic radiolucency scores and mechanically loose components. The mobile-bearing TKA remains vulnerable to polyethylene wear damage at the superior surface and introduces an independent inferior surface also vulnerable to wear damage.
活动平台全膝关节置换术（TKAs）旨在提高匹配度、降低接触应力并减少聚乙烯磨损。我们的目的是在一系列翻修手术中获取的假体部件中，评估翻修的活动平台全膝关节置换术聚乙烯磨损损伤的情况。对40个翻修的活动平台全膝关节置换术进行了胫骨部件聚乙烯上表面和下表面损伤以及影像学透亮线分析。在这项翻修研究中，发现上关节面损伤程度较高与下表面损伤程度较高相关。在影像学透亮线评分较高的部件和机械性松动的部件中，两个表面的损伤程度都更大。活动平台全膝关节置换术的上表面仍易发生聚乙烯磨损损伤，并且其独立的下表面也易发生磨损损伤。
