Evolution of technique and indications for the Bernese periacetabular osteotomy.

Acetabular dysplasia is among the most frequent causes of secondary osteoarthritis (OA) of the hip. While hip arthrolasty is a valid option in elderly patients, young and active patients are likely to outlive their implants and therefore may require a different approach. During the last 20 years, the emphasis of these osteotomies shifted from the femoral to the acetabular side, with the Bernese periacetabular osteotomy being one of the most frequently and successfully used techniques today. The procedure combines a polygonal juxta-articular osteotomy using a modified Smith-Peterson approach. During refinement of the technique, the principle osteotomy steps remained unchanged, while the soft-tissue dissection has been modified, in that the abductors are not detached from the iliac wing. Due to a better appreciation of hip deformities, other indications for this technique have continuously evolved over time.

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