2Kim H,Cunha AM,Browne R,et al.How much varus is optimal withproximal femoral osteotomy to preserve the femoral head in legg-calve-perthes disease[J].J Bone Joint Surg Am,2011,93:341-347.
3Herring JA,Kim HT,Browne R.Legg-Calve-Perthes disease.PartII:prospective multicenter study of the effect of treatment on outcome[J].J Bone Joint Surg Am,2004,86:2121-2134.
4Shah H,Orth MS,Siddesh ND.Effect of prophylactic trochanteric epiph-yseodesis in older children with perthes'disease[J].J Pediatr Orthop,2009,29:889-895.
5Rosenteld SB,Herring JA,Chao JC.Legg-Calve-Perthes disease:a re-view of cases with onset before six years of age[J].J Bone Joint SurgAm,2007,89:2712-2722.
6Wiig O,Terjessen T,Svenningsen S.Prognostic factors and outcome oftreatment in Perthes disease a prospective study of 368 patients with fiveyear follow up[J].J Bone Joint Surg Br,2008,90:1364-1371.
7Canavese F,Dimeglio A,Perthes'disease prognosis in children under sixyears of age[J].J Bone Joint Surg Br,2008,90:940-945.
8Sharma S,Shewale S,Sibinski M,et al.Legg-Calvé-Perthes diseaseaffecting children less than eight years of age:a paired outcome study[J].Int Orthop,2009,33:231-235.
9Castaneda P,Haynes R,Mijares J.Varus-producing osteotomy for pa-tients with lateral pillar type B and C Legg-Calve-Perthes disease fol-lowed to skeletal maturity[J].J Child Orthop,2008,2:373-379.
10Noonan A,Kenneth JP,Charles T.Results of femoral varus osteotomyin children older than 9 years of age with perthes disease[J].J PediatrOrhtop,2001,2:198-204.
