目的　探讨关节镜辅助下外侧支持带松解联合内侧髌股韧带（medial patellofemoral ligament，MPFL）重建手术治疗复发性髌骨脱位的临床效果。   方法　对我院2012年1月-2015年1月收治的19例复发性髌骨脱位患者，采取关节镜辅助下行外侧支持带松解、内侧髌股韧带重建联合手术。术后定期随访，记录术前和术后影像学结果、Lysholm 膝关节功能综合评分和 Kujala 髌股关节评分，观察重建韧带长度变化。  结果　19例均获随访，时间( 25.7±8. 56) 月（12~48月），术后无髌骨再脱位及恐惧征，无髌股关节疼痛加重，X线显示Q角在正常范围，膝关节CT（屈膝45°）显示患者髌骨外侧关节面张开角从术前平均（-1.2±6.8)°（-16°~8°）提高至术后(11.2±5.1)°（5°~18°），较术前有显著性差异（P＜0.01）。术后1年Lysholm 评分及Kujala 髌股关节评分较术前有明显改善。重建韧带长度术后即刻平均为（57.81±6.76）mm，术后1年为（58.36±6.87）mm，无明显松弛。  结论　关节镜辅助下二联手术治疗复发性髌骨脱位，能有效恢复髌股关节位置和功能，预防复发，术后1年韧带无明显松弛，疗效满意。

Objective 　To investigate clinical effect of arthroscopic lateral retinacular release combined with medial patellofemoral ligament reconstruction on recurrent patellar dislocation.　Methods　19 cases were admitted into our hospital for arthroscopic lateral retinacular release combined with reconstruction the medial patellofemoral ligament from January 2012 to January 2015. With Regular follow-up after surgery, we recorded preoperative and postoperative radiographic results, Lysholm knee function score and Kujala score changes of patellofemoral joint, ligament length reconstruction.　Results　19 cases were followed up for 12~48 (25.7±8.56) months after surgery, no patella redislocation and fear patellofemoral pain syndrome, no aggravation, X-ray Q angle in the normal range were found, and the knee joint CT (at 45 °) showed that patients with the lateral patellar articular surface opening angle had it increased to (11.2±5.1)°(5°~18°) postoperatively from an average (-1.2±6.8)°(-16°~8°)  preoperatively, with significant difference detected (P<0.01). Lysholm scores and Kujala patellofemoral joint score one year after surgery improved significantly compared with that prior to surgery. Average length of ligament after reconstruction immediately after operation was about (57.81±6.76) mm, and it increased to about (58.36±6.87) mm one year after surgery, with no significant relaxation found.　Conclusion　Arthroscopically assisted lateral retinacular release combined with medial patellofemoral ligament reconstruction can effectively restore the position and function of the patellofemoral joint and prevent recurrence, and the curative effect is satisfactory.