Core decompression performed on 31 hips with Perthes disease gaves good response in 84%of the hips,whereas Chiari pelvic osteotomy done in 18 hips with late stage disease,77%of the hips improved fairly well.

• 我们对31个Perthes病髋行中心减压术，优良率为84%25，对18个严重晚期Perthes病髋行Chiari骨盆截骨术，优良率为77%25。