5.By anatomic research and the situation of contracture tracts, we found that the contracture of middle gluteal muscle was the reason of obliquity of pelvis but maximus muscle would not cause it.

• 结合解剖学观察及术中所见，认为单纯臀大肌挛缩不会导致骨盆倾斜，臀中肌挛缩才会导致骨盆倾斜。