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目的：探讨自体半腱肌肌腱移植双束重建内侧髌股韧带治疗复发性髌骨脱位的临床疗效。方法自2012年1月至2015年6月我院收治复发性髌骨脱位38例（38膝），男性15例，女性23例，患者术前髌骨恐惧试验均为阳性，所有病例先行膝关节镜下检查明确诊断，半腱肌肌腱移植双束重建内侧髌股韧带。所有患者均未行胫骨结节内移术。比较手术前后髌股适配角的变化。术前及术后临床疗效评价均采用IKDC膝关节功能主观评分及Lysholm膝关节功能评分。结果术后所有病例均获得随访。有1例患者手术切口出现脂肪液化，经积极换药肉芽组织新鲜后予以缝合。其余患者无关节疼痛、肿胀，无一例髌骨骨折及再脱位，所有患者术后6个月膝关节伸屈功能恢复正常，且最后随访时髌骨恐惧试验均为阴性。术前髌股适配角为（24±9）°，术后明显改善为-（6±3）°，差异有统计学意义（P＜0．05）。术前IKDC膝关节功能主观评分及Lysholm膝关节功能评分分别为（44±5）分和（69．6±5．4）分，术后末次随访时IKDC膝关节功能主观评分及Lysholm膝关节功能评分分别为（85±4）分及（96．0±2．8）分，手术前后评分比较差异均有统计学意义（P＜0．01）。结论自体半腱肌肌腱移植双束重建内侧髌股韧带治疗复发性髌骨脱位能够恢复髌骨稳定，缓解症状，且有利于膝关节功能改善。“,”Objective To investigate the clinical effect of double-bundle medial patellofemoral ligament (MPFL) reconstruction in treatment of recurrent patellar dislocation by using semitendinosus autograft. Methods Thir-ty-eight patients (38 patellas) with recurrent patellar dislocation hospitalized in our hospital between January 2012 and June 2015 were included as the subjects in the study (15 males, 23 females), The preoperative apprehension test for patella was positive in all patients. All patients underwent the knee arthroscopic examination to confirm the diagnosis. The autogenous semitendinosus was harvested, and its two sides were sutured and fixed by the string on the anchor. The semitendinosus autograft was led to the femoral tunnel subcutaneously from its half-folded side, and fixed with a bioabsorbable screw. The changes of the congruence angles of the patella were compared before and after the operation. The preoperative and postoperative effect was evaluated by International Knee Documentation Committee (IKDC) knee function subjective scoring and Lysholm knee function scoring. Results All patients were followed up after the opera-tion. Fat liquefaction was found in 1 patient, which was sutured after fresh granulation tissue appeared by positive dressing change. No joint pain, swelling, patellar fracture or redislocation was found in the remaining patients. The knee flexion function of all patients returned to normal at 6 months after the operation. The patellar apprehension test showed negative in all patients at the last follow-up. The congruence angle was significantly improved from (24±9)° before the operation to-(6±3)° after the operation, with statistically significant difference (P<0.05). The IKDC knee function subjective scoring and Lysholm knee function scoring were (44±5) and (69.6±5.4) before the operation, and (85±4) and (96.0±2.8) at the last follow-up after the operation, respectively. There were statisti-cally significant differ-ence in the IKDC knee function subjective scoring and Lysholm knee function scoring before and after the operation (P<0.01). Conclusion The double-bundle MPFL reconstruction in treatment of recurrent patellar dislocation by using semitendinosus autograft can favor the stability of patella and relieve the symptoms, which can improve knee function.