The efficacy of semirigid hip orthosis in the delayed treatment of developmental dysplasia of the hipUraş, İsmail; Yavuz, Osman Yüksel; Uygun, Murat; Yldrm, Hamdullahııı; Kömürcü, MahmutJournal of Pediatric Orthopaedics B: July 2014 - Volume 23 - Issue 4 - p 339–342 doi: 10.1097/BPB.0000000000000052 Lower Limb Abstract Author Information This study assessed the use of semirigid hip orthosis to stabilize the femoral head into the acetabulum in the delayed treatment of developmental dysplasia of the hip (DDH; Graf type IIb or more severe) under the age of 6 months. Ninety-eight hips from 75 patients (four boys, 71 girls) were evaluated retrospectively. The mean age at treatment initiation was 3.2±1.3 months (1–6 months). As the dysplastic hip matured into a type I hip, we applied the weaning regimen for 1 month. Seventy-two patients (96%) were treated successfully in 4.2±1.1 months (2–8 months). All of the failures were type IV hips. We did not detect any acetabular or femoral head pathology in the later follow-up. Semirigid hip orthosis is safe and effective as the first-line treatment method for delayed DDH except in type IV hips in patients under 6 months of age. Level of Evidence: Level IV. Case series. Orthopaedics and Traumatology Department, Faculty of Medicine, Turgut Özal University, Ankara, Turkey Correspondence to İsmail Uraş, MD, Alparslan Turkes Bulvarı No: 57, 06510 Emek, Ankara, Turkey Tel: +90 312 203 55 55; fax: +90 312 221 36 70; e-mail: firstname.lastname@example.org © 2014 by Lippincott Williams & Wilkins, Inc.