Background: Management of moderate to severe slipped capital femoral epiphysis (SCFE) represents a controversial area. The goal in treatment is to restore proximal femoral anatomy and prevent early osteoarthritis secondary to femoroacetabular impingement. Methods: A retrospective, descriptive continuous study was carried out from January 2022 to June 2025. Patients with chronic stable SCFE (Southwick grade II - III) and treated using modified Dunn osteotomy via the anterior Hueter approach were included. Clinical and radiological outcomes were assessed using the Postel-Merle d’Aubigné (PMA) score and the Southwick angle. Data were analyzed statistically with the Wilcoxon signed-rank. Results: The study included 10 patients (8 males, 2 females) with a mean age of 15.5 ± 2.17 years. The mean Southwick angle was 50.1? ± 16.4, indicating predominantly moderate to severe deformities. The average preoperative PMA score improved from 12.9 ± 1.3 to 17.1 ± 1.6 postoperatively (p = 0.0039). At a mean follow-up of 19.1 months (range: 6 - 48 months), there was no avascular necrosis or chondrolysis. Eight patients (80%) had good to excellent functional outcomes. Conclusion: The benefit of surgery on functional outcomes indicates the efficacy of modified Dunn osteotomy.
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