A striated pattern of wear in ultrahigh-molecular-weight polyethylene components of Miller-Galante total knee arthroplasty.
A striated pattern of wear in ultrahigh-molecular-weight polyethylene components of Miller-Galante total knee arthroplasty.
复制标题
Miller-Galante 全膝关节置换术的超高分子量聚乙烯组件中的条纹磨损图案。
DOI：
10.1016/s0883-5403(98)90069-9
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Rosenberg,AG
中科院分区：
文献类型：
--
作者：
Wimmer,MA;Andriacchi,TP;Natarajan,RN;Loos,J;Karlhuber,M;Petermann,J;Schneider,E;Rosenberg,AG
聚乙烯胫骨假体的磨损是全膝关节置换术失败的潜在原因。除了点蚀、抛光和划痕外，在植入后相对较早取出的构件中，还观察到胫骨表面承载部分的细微条纹。斑纹最典型地发生在关节面中心的区域。这些条纹是正向的，被认为是地表的局部冷流。内侧和外侧条纹区之间有很强的相关性，表明这些模式与膝关节的循环滚动有关。条纹的一般特征和排列可归因于股骨回滚过程中发生的压缩和牵引力。对于临床医生来说，这些结果表明，在评估聚乙烯部件的磨损时，应考虑运动学和接触应力。
Wear of the polyethylene tibial components is a potential cause of failure in total knee arthroplasty. In addition to pitting, burnishing, and scratching, subtle striations on the bearing portion of the tibial surface have been observed in components retrieved relatively early after implantation. The striated pattern most typically occurred in areas centrally located within the articulating surface. The striations were anteroposterior directed and were identified as local cold flow at the surface. There was a strong correlation between the medial and lateral striated areas, suggesting that these patterns are related to cyclic rolling of the knee. The general characteristics and alignment of the striations could be attributed to the compressive and tractive forces occurring during femoral rollback. For the clinician, these results suggest that kinematics, as well as contact stress, should be considered when evaluating wear of polyethylene components.