Hip resurfacing arthroplasty

نویسنده

  • James M Simpson
چکیده

Historical context The concept of resurfacing the hip can be traced back to the early 1900s with the various techniques of interposition arthroplasty.1 Smith-Petersen produced a cast cobalt-molybdenum alloy (vitallium) interposition cup in 1940 as a culmination of many years work with different materials.2 Charnley experimented with a polytetrafluoroethylene (PTFE) hip resurfacing as a clear continuation of Smith-Petersen's earlier work before developing his low friction arthroplasty.3 He found his resurfacings worked well for two to three years and then rapidly failed. He initially attributed these failures to avascular necrosis of the femoral head but his subsequent observations, including experiments on himself, led him to blame PTFE wear debris. 3-5 In the 1970s interest was renewed, with polyethylene acetabular components mated with metal femoral heads. Initial results were promising but by eight years 40% survival was typical, resulting in this technology being largely abandoned.6 The large surface area of these hard-on-soft bearings produced significant volumes of polyethylene wear debris, inciting macrophages and triggering massive osteolysis.7,8 In the mid-1980s it became apparent that some Ring and McKee-Farrar metal-on-metal total hip replacements (THRs) were continuing to function well over 20 years after the primary operation.9-12 From these observations a new generation of hard-on-hard bearing hip resurfacings was born, manufactured from high-carbon cobalt-chrome.13

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تاریخ انتشار 2010