Pediatric Orthopaedics in Poland: Special IssueDega transiliac pelvic osteotomy for developmental hip dysplasia: a systematic reviewWoźniak, Łukasz; Idzior, Maciej; Jóźwiak, Marek Author Information Department of Pediatric Orthopaedics and Traumatology, Poznan University of Medical Sciences (Dega Hospital), Poznan, Poland Received 13 November 2019 Accepted 27 June 2020 Supplemental Digital Content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's website, www.jpo-b.com. Correspondence to Łukasz Woźniak, MD, Department of Pediatric Orthopaedics and Traumatology, Poznan University ofMedical Sciences (Dega Hospital), Os. Jagiellonskie 5/2, 61-225 Poznan, Poland, Tel: +48 791 998 035; fax: +48 61 8310173; e-mail: [email protected] Journal of Pediatric Orthopaedics B 32(3):p 211-220, May 2023. | DOI: 10.1097/BPB.0000000000000784 Buy SDC Metrics Abstract A systematic review of studies reporting outcomes after Dega transiliac pelvic osteotomy (DO) in developmental dysplasia of the hip (DDH) was carried out with a meta-analysis of the pre- and postoperative acetabular index (AI) values. The MEDLINE, ClinicalKey, PubMed, and Cochrane Library databases were searched for articles published up to April 2020 (keywords: Dega, Dega osteotomy, Dega acetabuloplasty, Dega transiliac, and Dega acetabular). The reference lists of reviewed articles were manually searched. Three hundred and seventy-two articles were identified; 23 met the inclusion criteria. The difference between pre- and postoperative AI values were reported in 19 studies (636 hips); the average postoperative AI value was ≤20° in 16/19. Ten studies were included in the meta-analysis. The overall difference between the mean pre- and postoperative AI was 22.5° (95% confidence interval 20.2–24.8°). The average postoperative center-edge angle was reported in 14/23 studies (480 hips) and was normative (≥20°). Hips were assessed using the Severin classification in 11/23 studies; 81.7% of 410 hips were Severin class I–II. The clinical outcome quantified following McKay/Berkeley or other criteria in nine studies (512 hips) was good or very good in 84.8% of hips at follow-up. The incidence of avascular necrosis (AVN) of the femoral head was 18.9% (19 studies, 856 hips). The cumulative rate of reoperation of 5.8% was reported in 14 studies. DO ensures adequate correction of radiological parameters in DDH, and facilitates a good clinical outcome with low incidences of AVN and reoperation risk. Level of evidence: IV. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.