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In a retrospective study of the surgical management of Legg-Calvé-Perthes disease, 16 femoral osteotomies (Group A) and 18 innominate osteotomies (Group B) were compared Smith regard to clinical and radiographic results. All hips were classified preoperatively as Catterall Group 3 or Group 4. The average followup period was 6 years in Group A and 8 years in Group B. The clinical results were the same in the 2 groups and all patients were asymptomatic in the affected hip(s) during daily activity. The radiographic results were also the same in the 2 groups with regard to measurements of the sphericity of the femoral head (Mose's index and epiphyseal quotient) but the coverage of the femoral head by the acetabulum (center edge angle) was better in the innominate osteotomy group.
Moberg et al. (1997) studied this question.