Slipped capital femoral epiphysis >30º. Modified Dunn procedure. Anatomical and functional evaluation in a retrospective cohort

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Francisco Praglia
Daniel Visona Dallapozza
Jorge Sueiro
Eduardo Stefano

Abstract

BackgroundThe residual deformity resulting from a moderate and/or severe proximal femoral epiphysis slipping (ScFE) leads to premature osteoarthritis due to impingement. The objectives were to assess improvement in the anatomy of the proximal femur and to evaluate hip function in patients with ScFE >30° treated with the modified Dunn procedure.MethodsA retrospective cohort of patients with ScFE >30° treated with hip dislocation control and modified Dunn procedure. Preoperative and postoperative clinical and radiographic measurements, intra-operative findings and functionality using Harris and D’aubigne & Postel scores were evaluated.ResultsThirteen cases, median age 12 years, median follow-up 14 months. Southwick slip angle showed a statistically significant decrease (preoperative: 75, ir 67-85; postoperative: 10, ir 5-17) (p <0.001). The head-neck offset radius obtained a significant improvement (pre- operative -0.13; postoperative: 0.12) (p 0.002). The 69.2% of patients presented intraarticular damage. The average scores for functionality were 14.6 (excellent improve- ment) and 83.4 (good). Complications: avascular necrosis 15.3% and chondrolysis 15.3%.ConclusionsThis technique restores the anatomy of the proximal femur and hip functionality in the short term. Although we do not have long-term results, at least in theory they would be good. However, the dislocation controlled with modified Dunn procedure is not free of complications and the risk of avascular necrosis and chondrolysis persists. 

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How to Cite
Praglia, F., Visona Dallapozza, D., Sueiro, J., & Stefano, E. (2013). Slipped capital femoral epiphysis &gt;30º. Modified Dunn procedure. Anatomical and functional evaluation in a retrospective cohort. Revista De La Asociación Argentina De Ortopedia Y Traumatología, 78(4), 199-209. https://doi.org/10.15417/239
Section
Clinical Research
Author Biographies

Daniel Visona Dallapozza, Hospital de Niños Ricardo Gutierrez

Jefe Sector Cadera

Eduardo Stefano, Hospital de Niños Ricardo Gutierrez

Jefe de Division Ortopedia y Traumatología

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