Grigoris P, Roberts P, McMinn D J
Royal Orthopaedic Hospital, Northfield, Birmingham, United Kingdom.
J Arthroplasty. 1993 Aug;8(4):433-7. doi: 10.1016/s0883-5403(06)80044-6.
The authors describe the mode of failure of the Ring UPM (Downs Brothers, Surrey, United Kingdom) uncemented metal-on-plastic total hip arthroplasty. Erosion of the external surface of the uncemented acetabular cup led to early loosening in eight cases. The subsequent production of large quantities of polyethylene debris caused massive granulomata, resulting in osteolysis of the acetabulum and femur. Revision surgery was difficult because of the loss of bone stock. The serious consequences of failure of this design lead to the conclusion that uncemented, nonmetal-backed polyethylene acetabular components should not be used.
作者描述了环形UPM（唐斯兄弟公司，英国萨里）非骨水泥型金属对塑料全髋关节置换术的失败模式。非骨水泥型髋臼杯外表面的磨损导致8例早期松动。随后产生的大量聚乙烯碎屑引起大量肉芽肿，导致髋臼和股骨骨质溶解。由于骨量丢失，翻修手术困难。这种设计失败的严重后果得出结论：不应使用非骨水泥、无金属背衬的聚乙烯髋臼组件。
