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OUTCOME OF PERTHES’ DISEASE IN CHILDREN OVER EIGHT YEARS FOR DIFFERENT TREATMENT MODALITIES



Abstract

Aim: To assess the outcome for Perthes disease in children over eight treated by observation, varus osteotomy, abduction plasters and acetabular augmentation.

Methods and results: A retrospective case note review of prospectively collected data for 44 children (48) hips with Catterall grades 2, 3 or 4 Perthes’ disease with onset age eight or older and followed to maturity was performed. The groups were demographically similar. For all groups combined 60% had a satisfactory Stulberg grade I to III outcome. Poorer outcomes (as assessed by Stulberg, centre edge angle and Reimer’s migration index) were associated with increasing age, greater initial head deformity and greater head involvement. Initial head deformity did not remodel for any treatment group. Indeed, progressive head deformity occurred despite plaster treatment or varus osteotomy but not after acetabular augmentation. Hips managed by acetabular augmentation also had better outcomes than the other groups for Stulberg, Reimer’s index and centre-edge angle.

Conclusions: Whatever the treatment the outcome for Perthes’ disease in children over eight is poorer with increasing age. No treatment offers the prospect of a good result in the older child with significant head involvement or significant initial deformity but acetabular augmentation seems to improve Stulberg, Reimer’s migration and centre-edge angle outcomes and prevents progressive femoral head deformity compared with observation, varus osteotomy and plaster treatment.

Correspondence should be addressed to BSCOS c/o BOA, at the Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London, WC2A 3PE, England.