[Early results of the treatment of congenital hip dysplasia with dislocation at the Preluxation Clinic in Poznań].

In 1955-1987 over 5,000 children were treated for congenital dysplasia of the hip with dislocation. A uniform method of treatment by the Frejka pillow was used. The condition of 823 hips in 636 children at 3-6 months after the start of walking and at the age of 15-36 months was evaluated. Stable reposition was found in 94 per cent of the cases but those hips were not satisfactorily rebuilt. The degree of rebuilding was determined using four radiological parameters and a point scale. Excellent rebuilding was found in 8 per cent, good in 33 per cent and fair in 59 per cent of the cases. Osteochondronecrosis of the head occurred in 13.6 per cent of the hips (severe in 2 per cent). The used treatment method was determined to be successful. Children should be followed up after the end of treatment for rebuilding of the hip joints.