LATE CDH - RESULTS OF THERAPY WITH MITIGA TED ABDUCTION IN 1193 HIPS (HANAUSEKS POSITION)

Results of 1193 dislocated anddysplastic hips in 695 children of a con sistent treatment by skin traction and splinting in a mitigated abduct ion device (Hanausek position) are given with regard to the acetabular development and avascular head necroses. The acetabular development d epends on the initial acetabular dysplasia and is overall satisfactory through final acetabular angles (Hilgenreiner) between 22 and 25 degr ees even in highly dysplastic acetabula in late cases. The procedure i s non-aggressive proven by the low rate of femoral head necroses of 3. 4%. Factors contributing to higher rates and degrees of iatrogenic dam age to the femoral head are short time or no preceding longitudinal tr action, low initial acetabular pathology and prolonged splinting.