Polyethylene wear in total hip arthroplasty.
作者： C.H. Geerdink
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摘要: Polyethylene wear increasingly has been blamed for osteolysis and granuloma formation after total joint arthroplasty. The authors evaluated the difference between bearing surfaces of stainless steel, cobalt chrome, titanium alloy. They also compared cemented all-polyethylene molded cups with metal-backed acetabular cups. These were machined polyethylene Two patient groups matched individually gender, age, weight, length followup. Analyses done using technique Livermore et al. surface evaluation consisted 3 matching, leaving 77 patients per group. Results showed linear rates 0.06 mm year, 0.05 0.08 year alloy, respectively. comparison nonmetal-backed components was not matched, 134 99 components. 0.011 in group statistically significant. results indicate that metal composition femoral minimal, if any, effect on rate. method fabrication use backing had a significant rate these groups. suggest compression-molded component may be optimal reducing hip
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