Instructional Course Lecture   |    
Rationale of Periacetabular Osteotomy and Background Work
Michael Leunig, MD; Klaus A. Siebenrock, MD; Reinhold Ganz, MD
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An Instructional Course Lecture, American Academy of Orthopaedic Surgeons
Michael Leunig, MD Klaus A. Siebenrock, MD Reinhold Ganz, MD Department of Orthopaedic Surgery, University of Bern, Inselspital, CH-3010 Bern, Switzerland. E-mail address for M. Leunig: michael.leunig@ insel.ch. E-mail address for K.A. Siebenrock: klaus.siebenrock@insel.ch. E-mail address for R. Ganz: reinhold.ganz@insel.ch
Printed with permission of the American Academy of Orthopaedic Surgeons. This article, as well as other lectures presented at the Academy’s Annual Meeting, will be available in March 2001 in Instructional Course Lectures, Volume 50. The complete volume can be ordered online at www.aaos.org, or by calling 800-626-6726 (8 a.m.-5 p.m., Central time).
No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article. No funds were received in support of this study.

J Bone Joint Surg Am, 2001 Mar 01;83(3):438-438
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Osteoarthrosis of the hip is frequently caused by mechanical abnormalities — for example, residual deformity from developmental hip disease such as acetabular dysplasia1. Untreated acetabular dysplasia is the most common cause of secondary osteoarthrosis2,3 arising from pathological joint-loading forces4. It has been reported to cause secondary osteoarthrosis by the age of fifty years in 25 to 50 percent of patients5,6. In order to improve the prognosis for the hip in this relatively young cohort of patients, pelvic osteotomies have recently been introduced to improve the abnormal anatomical conditions and reduce the load across the hip joint7.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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