[Aseptic necrosis of proximal femur in children undergone early non-operative treatment of DDH].

Aseptic necrosis of proximal femur is the most serious complication of DDH conservative treatment. 72 dysplastic hips in 48 girls and 8 boys have been evaluated. the hips were Grafs IIc, D, III and IV types, and the treatment started between 2nd and 12th week of the newborns age. The hips have been observed until the children started walking (average 13 months). The early treatment did not eliminate femoral osteochondrosis, but the diagnosed cases were mainly not severe according to Kruczyński.