Abstract：Objective To compare the clinical efficacy of one-stage and two-stage reconstruction repair of knee joint anterior cruciate ligament and medial collateral ligament injury.Methods In January 2012 to July 2014，27 cases of ACL combined with Ⅱ MCL degree of acute injury were randomly divided into A and B groups.Group A (n＝15) underwent arthroscopic autologous hamstring ACL reconstruction，MCL avulsion fracture of anchor repair.Group B (n＝12) underwent brace fixation of the affected limb.Patients were followed up for 12 to 24 months，with an average of 18 months，according to the stress inside the gap open degree and Lachman test score of knee stability by IKDC and Lysholm knee function was assessed before surgery and at the end of follow-up of patients with knee joint function score. Results A，B two groups of patients with preoperative stress level medial clearance were class Ⅱ，Lachman test were grade Ⅲ.Preoperative IKDC and Lysholm knee function scores were (45.36±4.12) and (43.23±3.55) in group A，(45.31±1.50) and (44.10±2.27) in group B.At the time of the last follow-up the stress level medial clearance were degree Ⅰ in 10 cases，grade Ⅱ in 5 cases in group A；12 cases of group B were all grade Ⅰ.There were 13 Lachman test negative casesingroup A，including 2 cases of grade Ⅰ；and 11 negative casesin group B，including1 case of grade Ⅰ.IKDC and Lysholm score of knee joint function were (87.54±5.24) and (86.73±6.99) respectively in group A and were (94.11±3.38) and (92.32±3.43) ingroup B.The differenceswere statistically significant (P＜0.05).Conclusion For knee joint ACL combined with MCL injury，conservative treatment of group B underwent one-stage MCL，phase Ⅱ arthroscopic ACL reconstruction，postoperative knee function and stability grading knee joint activities were better than A group over the same period of reconstruction of ACL and MCL repair.
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