The authors studied retrospectively 33 hips in 26 children at an average of 9 years 5 months after simultaneous open reduction and Dega transiliac osteotomy for developmental dislocation of the hip (DDH). All children were younger than 2 years of life at surgery. At the latest follow-up 89% of the clinical results and 72% of the radiographic results were rated excellent or good, despite a 45% rate of avascular necrosis observed before surgery. The authors attempted to identify factors influencing the final result. Given the low complication rate (3%) and low reoperation rate (3%), the authors conclude that the reviewed surgical protocol is safe and efficient in the treatment of DDH in young children.