The Birmingham Interlocking Pelvic Osteotomy for acetabular dysplasia

AimsThe aim of this study was to evaluate the long-term clinical and radiographic outcomes of the Birmingham Interlocking Pelvic Osteotomy (BIPO).Patients and MethodsIn this prospective study, we report the mid- to long-term clinical outcomes of the first 100 consecutive patients (116 hips; 88 in women, 28 in men) undergoing BIPO, reflecting the surgeon’s learning curve. Failure was defined as conversion to hip arthroplasty. The mean age at operation was 31 years (7 to 57). Three patients (three hips) were lost to follow-up.ResultsSurvivorship was 76% at ten years and 57% at a mean of 17 years. Younger patients (< 20 years) had the best survivorship (20 hips at risk; 90% at 17 years; 95% confidence interval 65 to 97). Post-operative complications occurred after 12 operations (10.4%) over the duration of the study. Increasing patient age and hip arthritis grade were primary determinants of surgical failure.ConclusionBIPO provides good to excellent survivorship in appropriately selected patients, with a rel...