Clayton M L, Thirupathi R G
Clin Orthop Relat Res. 1983 Jul-Aug(177):154-9.
Dislocation after total hip arthroplasty (THA) occurs in 1%-3% of the cases reported in the literature. Recurrent dislocations due to malpositioned components should be treated by revision arthroplasty. Dislocated hips that have optimally positioned components but weak abductors can be treated by a special brace that prevents extremes of flexion, adduction, and rotation. Two hundred and eighty-nine total hip arthroplasties were performed from 1975 to 1981. Nine patients, all of whom had optimal position of components and the brace treatment, had dislocations. In one patient who had a spastic muscle disorder the brace was used as prophylaxis. The short chair-back brace has a lateral joint with thigh cuff. The joint can be locked at a particular position to give the desired movement of the hip joint. The brace, applied after the second dislocation, is worn for six to nine months. Excellent results were obtained in nine patients. One patient is still using the brace. The brace is light and can be worn under normal clothing; ordinary activities are easily performed by patients wearing the brace. Patients should be trained to avoid positions and activities that predispose to dislocation.
全髋关节置换术（THA）后脱位在文献报道的病例中发生率为1% - 3%。因假体位置不当导致的复发性脱位应通过翻修关节置换术治疗。假体位置最佳但外展肌无力的脱位髋关节可通过一种特殊支具治疗，该支具可防止髋关节过度屈曲、内收和旋转。1975年至1981年共进行了289例全髋关节置换术。9例患者均接受了假体位置最佳的治疗且使用了支具，均发生了脱位。其中1例患有痉挛性肌肉疾病的患者，支具用作预防措施。短椅背支具带有一个与大腿袖套相连的外侧关节。该关节可锁定在特定位置，以实现髋关节所需的活动。在第二次脱位后使用支具，佩戴6至9个月。9例患者均取得了良好效果。1例患者仍在使用支具。该支具轻便，可穿在普通衣服下；佩戴支具的患者可轻松进行日常活动。应训练患者避免易导致脱位的姿势和活动。
