Abstract：
Metallosis is a known yet rare late complication of unicompartmental and total knee arthroplasty (TKA), usually secondary to either metal-backed patellar component failure, mobile-bearing polyethylene dislocation, or catastrophic polyethylene failure and wear through. The majority of literature surrounding metallosis has been published in relation to total hip arthroplasty (THA) metal on metal bearing wear or mechanically assisted crevice corrosion.This case report describes the development of metallosis in a 77-year-old male patient with advanced (Kellgren-Lawrence Grade 4) osteoarthritis with associated valgus deformity, who underwent index TKA with a semiconstrained revision knee system due to intraoperative medial collateral ligament laxity. The taper junction between the titanium alloy stem and cobalt chromium femoral component was the source of diffuse intra-articular metallosis.
摘要：
金属病是一种已知但罕见的单室和全膝关节置换术（TKA）的晚期并发症，通常继发于金属背衬髌骨组件故障，移动轴承聚乙烯错位，或灾难性的聚乙烯失效和磨损。有关金属学的大多数文献已发表，涉及全髋关节置换术（THA）金属对金属轴承磨损或机械辅助缝隙腐蚀。该病例报告描述了一名77岁男性晚期（Kellgren-Lawrence4级）骨关节炎伴相关外翻畸形的金属病的发展，由于术中内侧副韧带松弛，他接受了半束缚膝关节翻修系统的索引TKA。钛合金茎和钴铬股骨组件之间的锥形连接是弥漫性关节内金属化的来源。
