[Centering angles of the femoral head and neck in the dysplastic hip].

Centering angle of the femoral head determining relation of the head and acetabulum depending on the epiphyseal plane and acetabular roof coverage of the head is described. Centering angles of the neck indicating cranial or lateral dislocation of the proximal femur in relation to apparent shaft-neck angle and anteversion angle are also described. The parameters proved useful in grading of the dysplastic hip.