Gross Trunnion Failure of a Type 1 Taper After Metal-on-Polyethylene Total Hip Arthroplasty: A Report of 2 Cases.

CASE We describe 2 cases of gross trunnion failure (GTF) in males with Centers for Disease Control and Prevention Class 3 obesity 10 years after metal-on-polyethylene total hip arthroplasty (THA) with a titanium-alloy femoral stem and Type 1 taper. One patient received a large diameter cobalt-chromium femoral head, whereas the other received a smaller diameter head, both with high-offset femoral stems. CONCLUSION This is the first report of GTF involving the Echo Bi-Metric femoral stem after metal-on-polyethylene THA, and surgeons should consider the potential complication of GTF when using this specific femoral stem with metal heads in obese male patients.

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