Objective: The aim of this study was to investigate the long term clinical and radiological outcome of simultaneously combined surgery in developmental dysplasia of the hip.

Material and Method: Fortyeight hips of 39 skeletally maturated patients who underwent simultaneously open reduction, innominate ostetomy and femoral osteotomy were evaluated. Mean follow up years were 12,8 (±3,9). Patients age, preoperative early postoperative and end control acetabular indexes, radiological and clinical classification outcomes, avascular necrosis, center-edge angles were reported.

Results: According to Barrett's modified McKay criteria in 39 patients; 28 (%71,8) had excellent, 8 had (%20,5) good, 3 had (%7,7) fair results. There were no poor results. According to Kalamchi Mac Ewen classification in 39 patients there were 8 (%20,5) patients had avascular necrosis. Preoperative, early postoperative and end control acetabular indexes were analyzed. There were significiant mean change (p<0.001).

Conclusion: We investigated in our study that long term results of simultaneously combined surgery in developmental dysplasia of the hip were good outcome. But there were remarkable studies found low hip survive in very long term. We think that some pathologies, not able to find with conventional methods, may cause this catastrophic results. Very long term follow up will help us to find this pathologies.