[Y-shaped cartilage in the development of the normal pelvis and in congenital hip dislocation].

The authors use a radiographic approach to demonstrate the primary role of the triradiate cartilage in hip development in the normal child and in congenital dislocation of the hip. The orientation of this cartilage with respect to the dysplasia gives an indication as to the prognosis of the CDH. The acetabular angle is of lesser interest with respect to the orientation of the triradiate cartilage on the pelvic radiographic examination.