Effect of posterior oblique ligament repair on rotational stability of knee joint

目的: 探讨膝关节内侧副韧带合并前交叉韧带损伤时，后斜韧带缝合修复与否对膝关节旋转稳定性的影响。. Methods: The clinical data of 50 patients (50 knees) with grade-3 MCL-ACL combined injuries who met the selection criteria between January 2013 and December 2015 were retrospectively analyzed. All ACLs were reconstructed with autogenous tendon and the superficial and deep layers of MCLs were sutured; then, POLs were also sutured in 25 patients of repair group and only received conservation treatment postoperatively in 25 patients of conservation group. There was no significant difference in gender, age, disease duration, and preoperative KT-1000 measuring, medial joint space opening, International Knee Documentation Committee (IKDC) score, visual analogue scale (VAS) score, and knee range of motion between the two groups ( P>0.05). 结果: 术后两组患者切口均Ⅰ期愈合，无手术相关并发症发生。患者均获随访，缝合组随访时间 28～56 个月，平均 38.1 个月；保守治疗组为 26～55 个月，平均 29.1 个月。末次随访时，两组患者膝关节 IKDC 评分、VAS 评分、KT-1000 测量、内侧关节间隙开口以及膝关节活动度均较术前明显改善（ P 0.05）。Slocum 试验检查显示两组膝关节均无前内侧旋转不稳定。. Conclusion: The POL repair can't obtain more medial stability after ACL reconstruction and MCL repair (superficial and deep layers) for patients who have MCL-ACL combined injuries.