[Late hip dislocation--treatment results of 1193 hips in attenuated abduction (Hanausek position)].

Results of 1193 dislocated and dysplastic hips in 695 children of a consistent treatment by skin traction and splinting in a mitigated abduction device (Hanausek position) are given with regard to the acetabular development and avascular head necroses. The acetabular development depends on the initial acetabular dysplasia and is overall satisfactory through final acetabular angles (Hilgenreiner) between 22 and 25 degrees even in highly dysplastic acetabula in late cases. The procedure is non-aggressive proven by low rate of femoral head necroses of 3.4%. Factors contributing to higher rates and degrees of iatrogenic damage to the femoral head are short time or no preceding longitudinal traction, low initial acetabular pathology and prolonged splinting.