Metals and Alloys, University of Bayreuth, Germany.
J Biomed Mater Res B Appl Biomater. 2010 Apr;93(1):244-51. doi: 10.1002/jbm.b.31581.
Most total knee replacement joints consist of a metal femoral component made from a cobalt-chromium- molybdenum (CoCrMo)-alloy and a tibial component with an ultrahigh molecular weight polyethylene (UHMWPE) bearing surface. Wear of the UHMWPE remains the primary disadvantage of these implants. The allergic potential ascribed to CoCrMo-alloys is a further concern. Other metallic alloys with and without ceramic coatings are clinically used to avoid these problems. This study compared the mechanical surface properties of an oxidized zirconium alloy with those of cast and wrought CoCrMo and TiAlV6-4. Additionally, the influence of a titanium nitride (TiN)-plasma coating on the surface properties was investigated. The composition of the oxidized zirconium layer was analyzed. Micro- and macrohardness tests as well as adhesion tests were used to reveal material differences in terms of their abrasive wear potential in artificial joints.
大多数全膝关节置换关节由钴铬钼（CoCrMo）合金制成的金属股骨部件和具有超高分子量聚乙烯（UHMWPE）承载表面的胫骨部件组成。UHMWPE 的磨损仍然是这些植入物的主要缺点。归因于 CoCrMo 合金的过敏潜力是另一个关注点。其他具有和不具有陶瓷涂层的金属合金在临床上用于避免这些问题。本研究比较了氧化锆合金与铸造和锻造 CoCrMo 和 TiAlV6-4 的机械表面性能。此外，还研究了氮化钛（TiN）等离子涂层对表面性能的影响。分析了氧化锆层的成分。使用显微和宏观硬度测试以及附着力测试来揭示人工关节中磨损潜在的材料差异。
