Kore Lydia, Bates Taylor, Mills Gavin, Lybeck Dustin
Department of Orthopaedic Surgery, Brooke Army Medical Center, Fort Sam Houston, TX.
Arthroplast Today. 2020 Aug 1;6(3):552-555. doi: 10.1016/j.artd.2020.06.015. eCollection 2020 Sep.
Oxidized zirconium was introduced as an alternative bearing surface to decrease polyethylene wear and reduce aseptic mechanical failure of hip and knee arthroplasties. Oxidized zirconium combines the strength of a metal with wear properties of ceramic, proposing increased survivorship of implant components, and possible decreased rate of revision. Despite a harder surface than cobalt-chromium, the substrate of zirconium is a softer metal. Although uncommon, prior reports have described accelerated wear and severe metallosis after femoral head dislocation in oxidized zirconium total hip arthroplasty; however, this has not been described in total knee arthroplasty. We report a case of an oxidized zirconium total knee arthroplasty failure in a patient with knee instability. This is the first report of catastrophic failure of an oxidized zirconium total knee arthroplasty implant.
氧化锆作为一种替代的关节面被引入，以减少聚乙烯磨损并降低髋关节和膝关节置换术的无菌性机械故障。氧化锆结合了金属的强度和陶瓷的耐磨性能，提高了植入部件的生存率，并可能降低翻修率。尽管氧化锆的表面比钴铬合金更硬，但其基底是一种较软的金属。虽然不常见，但先前的报告描述了氧化锆全髋关节置换术中股骨头脱位后加速磨损和严重金属沉着病的情况；然而，全膝关节置换术中尚未有此类报道。我们报告了一例膝关节不稳定患者氧化锆全膝关节置换术失败的病例。这是氧化锆全膝关节置换术植入物灾难性失败的首例报告。
