５４例（７３髋）先天性髋脱位治疗后股骨头缺血性坏死病例，平均随访７年，发现Ⅰ、Ⅱ型恢复至正常者分别为８９％、７０％；Ⅲ、Ⅳ型者由于股骨近端纵行生长骺板的损害，８３％演变成短髋畸形，根据ＡＴＤ值将短髋畸形分成三型，作者认为Ｌ形Ｘ线生长紊乱线是早期判断骺板损伤的标志。 54 cases (73 hips) of congenital hip dislocation after treatment of avascular necrosis of the femoral head, with an average follow-up of 7 years and found that type Ⅰ, Ⅱ were restored to normal were 89%, 70%; Ⅲ, Ⅳ type due to the femoral proximal Terminal longitudinal growth of the epiphyseal plate damage, 83% evolved into short-hip deformity, according to the ATD value will be divided into three types of short-hip deformity, the author believes that L-shaped X-ray disorder line of growth is to determine the early signs of epiphyseal injury.