Conclusion:Low soft tissue tension,especially weakness of the abductor musculature was the most important caust of dislocation after THA.

• 闭合复位或开放复位后髋人字石膏固定 ,大多数早期能获得成功。 软组织张力低 ,特别是外展肌力乏力是THA脱位最重要原因