发育性髋关节发育不良(developmental dysplasiaof the hip,DDH)旧称先天性髋关节脱位(congenitaldislocation of the hip,CDH),是髋关节在发育过程中以空间和时间上的不稳定为特征的一组病变的总称,包括髋关节脱位、半脱位和髋臼发育不良。DDH可造成患儿的步态异常、相邻关节发育异常、脊柱继发畸形,导致成年后下腰痛和髋关节退行性变引起的疼痛。由于该病与髋关节发育 Developmental dysplasia of the hip (DDH), formerly known as congenital dislocation of the hip (CDH), is a group of lesions characterized by spatial and temporal instability in the development of the hip joint The general term, including hip dislocation, subluxation and acetabular dysplasia. DDH can cause abnormal gait in children, abnormal development of adjacent joints, secondary deformity of the spine, leading to pain in adult patients with low back pain and hip degeneration. Because of the disease and hip development