Lanting Brent A, Springer Bryan D
OrthoCarolina Hip and Knee Center, Charlotte, NC 28207, USA.
Orthop Clin North Am. 2012 Nov;43(5):e63-5. doi: 10.1016/j.ocl.2012.08.003. Epub 2012 Sep 27.
A unique case of catastrophic wear of a total hip arthroplasty is presented. This brief report demonstrates the presentation of catastrophic wear of a modular acetabular component with protrusion of the femoral head through a modular metal-backed titanium cup. During the revision surgery, the polyethylene was found to have disengaged from the cup, and the cup was pistoning on the femoral neck. Significant metallosis and bone loss was found. The presence of severe metallosis mimicked bone on the preoperative radiograph and obscured the severity of the osteolysis seen on imaging.
本文介绍了一例全髋关节置换术灾难性磨损的独特病例。这份简短报告展示了模块化髋臼部件灾难性磨损的情况，股骨头通过模块化金属背衬钛杯突出。在翻修手术中，发现聚乙烯已从髋臼杯中脱离，髋臼杯在股骨颈上活塞样移动。发现了严重的金属沉着症和骨质流失。严重金属沉着症的存在在术前X光片上类似骨质，掩盖了影像学上所见骨溶解的严重程度。
