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Evaluation of the Risk Factors of Avascular Necrosis of the Femoral Head in Developmental Dysplasia of the Hip in Infants Younger Than 18 Months of Age1

Ağuş, Haluk M.D.; Ömeroğlu, Hakan M.D.; Uçar, Hakan M.D.§; Biçimoǧlu, Ali M.D.; Tümer, Yücel M.D.§

Journal of Pediatric Orthopaedics B: January 2002 - Volume 11 - Issue 1 - p 41-46

Sixty-seven dysplastic hips of 54 infants with an average age of 11.9 months were treated by the same surgical technique, including iliopsoas and adductor tenotomies via medial approach and arthrography for verification of the concentric reduction. The average follow-up period was 44.5 months. The rate of overall avascular necrosis (AVN) was 27% and that of severe AVN was 7%. With the numbers available in the study, a statistically significant relationship could not be found between the rate and severity of AVN and several preoperative and intraoperative components such as age, sex, side, dislocation grade, development of the ossific nucleus and quality of intraoperative reduction. Nevertheless, hips of infants treated between 13 months and 15 months of age, hips of male patients and left hips had slightly higher ratios of ischemic changes that were not statistically significant.

†Department of Orthopaedics and Traumatology, S.S.K. Tepecik Hospital, Izmir, Turkey; ‡Department of Orthopaedics and Traumatology, Osmangazi University Faculty of Medicine, Eskişehir, Turkey §Department of Orthopaedics and Traumatology, Güven Hospital, Ankara, Turkey; ¶Department of Orthopaedics and Traumatology, Ankara Numune Hospital, Ankara, Turkey

1A part of this study was presented as a free paper at the 19th Meeting of the European Pediatric Orthopaedic Society, 5-8 April 2000, Milan, Italy.

Address correspondence and reprint requests to Dr Hakan Ömeroğlu, Bitiştiren Sokak 30/2, 06570 Ankara, Turkey.

© 2002 Lippincott Williams & Wilkins, Inc.