The roentgenological end results after caliper treatment of coxa plana with varying degrees of epiphyseal involvement.

The radiological results after caliper treatment of 45 hips with Coxa Plana are presented. The material was grouped and analysed according to the degree of primary involvement of the epiphysis by the necrotic process. It was found that the risk for deformation of the femoral head became significantly higher in the groups with more extensive involvement of the epiphysis. This observation shows that the primary involvement of the epiphysis has a determining influence on the results. It further indicates that if the radiographic results from different materials of Coxa Plana are to be compared consideration must be given to the primary extent of necrosis of the epiphysis.