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A five-year radiostereometric follow-up of the Birmingham Hip Resurfacing arthroplasty

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The early designs of hip resurfacing implants suffered high rates of early failure, making it impossible to obtain valuable mid-term radiostereophotogrammetric (RSA) results. The metal-on-metal Birmingham Hip Resurfacing arthroplasty has shown promising mid-term results and we present here the first mid-term RSA analysis of a hip resurfacing implant.

The analysis was performed in 19 hips at five years post-operatively. The mean acetabular component translation and rotation, and femoral component translation were compared with the previous RSA measurements at two and six months, and one and two years.

There was no statistical significance (t-test, p ≤ 0.05) between these consecutive movements, indicating the mid-term stability of the implant.

Correspondence should be sent to Dr R. Itayem at Department of Orthopaedic Surgery, Visby Hospital, 621 84 Visby, Sweden; e-mail: raed.itayem@hsf.gotland.se

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