Peterson C D, Hillberry B M, Heck D A
J Biomed Mater Res. 1988 Oct;22(10):887-903. doi: 10.1002/jbm.820221005.
A knee simulator was used to study the wear of carbon fiber reinforced UHMWPE (Poly Two) (Poly Two is a registered trademark of Zimmer, USA) tibial and patellar components against Ti-6A1-4V, titanium nitride (TiN)-coated Ti-6A1-4V, and cobalt-chromium-molybdenum femoral components. The prostheses tested were regular sized Miller-Galante total knees mounted on 316L stainless steel fixtures using bone cement. An environmental chamber surrounded the knee and maintained bovine serum lubricant at 37 degrees C. The specimens were tested using consecutive blocks of 464 level walking steps, 8 ascending stairs and 8 descending stairs for a total of 100,000 steps. The wear mechanisms found on the tibial components were scratching, carbon-fiber associated damage, surface deformation, pitting, minor abrasion, and delamination. Three forms of carbon fiber associated damage were identified; fibers pulled from the surface, broken fibers, and UHMWPE removed from the surface fibers. The SEM evaluation revealed a pit forming mechanism. No correlation was found between femoral component material and tibial surface damage. Visual examination of the femoral components revealed no signs of wear or scratching on the cobalt-chromium-molybdenum or TiN-coated Ti-6A1-4V components. There were, however, many light surface scratches on the uncoated Ti-6A1-4V components, which were also observed in a supplementary test of an uncoated Ti-6A1-4V component tested with a conventional polyethylene tibial component.
使用膝关节模拟器研究了碳纤维增强超高分子量聚乙烯（Poly Two）（Poly Two是美国Zimmer公司的注册商标）胫骨和髌骨部件与Ti-6Al-4V、氮化钛（TiN）涂层的Ti-6Al-4V以及钴铬钼股骨部件之间的磨损情况。所测试的假体是使用骨水泥安装在316L不锈钢固定装置上的常规尺寸的Miller-Galante全膝关节。一个环境舱环绕着膝关节，并将牛血清润滑剂保持在37摄氏度。对标本进行测试时，采用连续的464级平步行走、8次上楼梯和8次下楼梯，总共100,000步。在胫骨部件上发现的磨损机制包括刮擦、与碳纤维相关的损伤、表面变形、点蚀、轻微磨损和分层。识别出了三种与碳纤维相关的损伤形式；从表面拉出的纤维、断裂的纤维以及从表面纤维上去除的超高分子量聚乙烯。扫描电子显微镜评估揭示了一种点蚀形成机制。未发现股骨部件材料与胫骨表面损伤之间存在相关性。对股骨部件的目视检查显示，钴铬钼或TiN涂层的Ti-6Al-4V部件上没有磨损或刮擦迹象。然而，在未涂层的Ti-6Al-4V部件上有许多轻微的表面划痕，在用传统聚乙烯胫骨部件测试未涂层的Ti-6Al-4V部件的补充试验中也观察到了这些划痕。
