[Tendency of acetabular development of conservatively treated hip dislocation with femur head necrosis (1)].

The late results of 101 cases of avascular necrosis in congenital dislocation of the hip are reported, which occurred after closed reduction between 1954 and 1960. A good development of hips was observed in 24 cases (23,8%). A severe deformity took place in 33 hips (32.7%), which mostly had total femoral head necrosis. In the groups with partial necrosis a good development was occurred only in the half of all cases. Early treatment led to better results. Besides the necrosis the grade of luxation plays an important role for the development of the hips.