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Journal of Bone and Joint Surgery - British Volume, Vol 91-B, Issue 11, 1438-1442.
doi: 10.1302/0301-620X.91B11.21796  
Copyright © 2009 by British Editorial Society of Bone and Joint Surgery
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Periacetabular osteotomy reduces the dynamic instability of dysplastic hips

A. Maeyama, MD, PhD, Orthopaedic Surgeon1; M. Naito, MD, PhD, Orthopaedic Surgeon, Professor1; S. Moriyama, PhD, Assistant Professor2; and I. Yoshimura, MD, PhD, Orthopaedic Surgeon1

1 Department of Orthopaedic Surgery, School of Medicine Fukuoka University 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.
2 Department of Engineering, Faculty of Engineering Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.

Correspondence should be sent to Dr A. Maeyama; e-mail: akira.maeyama0713{at}joy.ocn.ne.jp

We compared the dynamic instability of 25 dysplastic hips in 25 patients using triaxial accelerometry before and one year after periacetabular osteotomy. We also evaluated the hips clinically using the Harris hip score and assessed acetabular orientation by radiography before surgery and after one year. The mean overall magnitude of acceleration was significantly reduced from 2.30 m/s2 (SD 0.57) before operation to 1.55 m/s2 (SD 0.31) afterwards. The mean Harris hip score improved from 78.08 (47 to 96) to 95.36 points (88 to 100). The radiographic parameters all showed significant improvements.

This study suggests that periacetabular osteotomy provides pain relief, improves acetabular cover and reduces the dynamic instability in patients with dysplastic hips.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General