Methods Three cases of slipped epiphysis of femoral head were treated by using percutaneous hollow screw orthotopic fixation under C arm guide since 2002,and regular follow-up has been done.

• 方法自2002年起采用C型臂引导下原位空心钉固定技术治疗股骨头骨骺滑脱3例,并定期随访。