[Bernese periacetabular osteotomy. : Indications, technique and results 30 years after the first description].

Lerch, TD; Steppacher, SD; Liechti, EF; Siebenrock, KA; Tannast, M (2016). [Bernese periacetabular osteotomy. : Indications, technique and results 30 years after the first description]. Orthopäde, 45(8), pp. 687-694. Springer-Medizin-Verlag 10.1007/s00132-016-3265-6

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The Bernese periacetabular osteotomy (PAO) is a surgical technique for the treatment of (1) hip dysplasia and (2) femoroacetabular impingement due to acetabular retroversion. The aim of the surgery is to prevent secondary osteoarthritis by improvement of the hip biomechanics. In contrast to other pelvic osteotomies, the posterior column remains intact with this technique. This improves the inherent stability of the acetabular fragment and thereby facilitates postoperative rehabilitation. The birth canal remains unchanged. Through a shortened ilioinguinal incision, four osteotomies and one controlled fracture around the acetabulum are performed. The direction of acetabular reorientation differs for both indications while the sequence of the osteotomies remains the same. This surgical approach allows for a concomitant osteochondroplasty in the case of an aspherical femoral head-neck junction. The complication rate is relatively low despite the complexity of the procedure. The key point for a successful long term outcome is an optimal reorientation of the acetabulum for both indications. With an optimal reorientation and a spherical femoral head, the cumulative survivorship of the hip after 10 years is 80-90 %. For the very first 75 patients, the cumulative 20-year survivorship was 60 %. The preliminary evaluation of the same series at a 30-year follow-up still showed a survivorship of approximately 30 %. The PAO has become the standard procedure for the surgical therapy of hip dysplasia in adolescents and adults.

Item Type:

Journal Article (Further Contribution)


04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Lerch, Till; Steppacher, Simon Damian; Liechti, Emanuel; Siebenrock, Klaus-Arno and Tannast, Moritz


600 Technology > 610 Medicine & health








Lilianna Bolliger

Date Deposited:

22 Mar 2017 12:52

Last Modified:

24 Oct 2017 15:48

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Acetabulum; Adolescents; Coxa; Femoroacetabular impingement; Hip dysplasia





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