Glossary / Lexicon

Developmental dysplasia of the hip or DDH refers to a congenital condition of the hip joint. The hip joint is created as a ball-and-socket joint. In Developmental dysplasia of the hip, the hip socket may be shallow, letting the "ball" of the long leg bone, also known as the femoral head, slip in and out of the socket. The "ball" may move partially or completely out of the hip socket.