Effect of a Second Joint Arthroplasty on Metal Ion Levels After Primary Total Hip Arthroplasty

摘要

It has been established that serum metal ion levels increase after primary total hip arthroplasty (THA) regardless of bearing surface. We conducted a study to determine the effect of a second joint arthroplasty on existing serum metal ion levels at long-term follow-up. Twelve patients underwent primary THA and then either another THA (8 patients) or total knee arthroplasty (TKA) (4 patients). The secondary procedures were performed a mean of 102.7 months (range, 36-144 months) after the index surgeries. The secondary THA group had significantly elevated levels of cobalt ion at 36 and 48 months, of chromium ion at 12 and 24 months, of titanium at 48 and 72 months.