基于MRI对交叉韧带松紧度与半月板损伤的相关性研究

目的　探究交叉韧带的松紧度与半月板损伤的相关性，从解剖学上探索半月板损伤的影响因素，为预测和诊断半月板损伤提供新的依据。 方法　收集南方医科大学珠江医院2014年1月~2016年12月260例患者单膝关节伸直位的MRI资料。在各膝MRI相同矢状面分别测量前、后交叉韧带的长度a和p，及其起止点的距离la和lp。计算出交叉韧带松紧度系数R=(a+p)/(la+lp)。用t检验比较各组患者间的差异性，用Spearman 相关分析分别探讨松紧度系数与半月板损伤的相关性。 结果　 t检验：无论是否存在骨关节炎，半月板损伤组和无半月板损伤组的R值均存在显著差异性（P <0.05）。Spearman相关性分析：无骨关节炎患者中rs=0.620，R值与半月板损伤存在较强的正相关性；有骨关节炎患者中rs =0.313，R值与半月板损伤存在弱正相关性。 结论　交叉韧带松紧度与半月板损伤存在一定程度的相关性，特别在膝关节无骨关节炎的年轻患者中，韧带越松弛，半月板损伤越容易发生。但在膝关节有关节炎的老年患者中，交叉韧带的松紧程度并非半月板损伤的主要因素。

Study on the correlation between the tightness of cruciate ligament and meniscus injury based on MRI measurement

Objective　This study was aimed to explore the correlation between tightness of cruciate ligaments and meniscus injuries anatomically. 　Methods　260 knee-joint MRI were collected from Southern Medical University, Zhujiang hospital during January 2014 to December 2016. Then, the critical data according to MRI containing alength of anterior cruciate ligament(ACL)], p length of posterior cruciate ligament(PCL)], la (attachment distance of ACL) and lp (attachment distance of PCL)were measured to figure out the tightness coefficient R=(a+p)/(la+lp). t-Test and spearman correlation analysis were used to study these samples.　Results　t-Test presented significant difference between patients with and without meniscus injuries (P<0.05). Spearman correlation analysis showed the relatively strong correlation between R and meniscus injuries in non-osteoarthritis patients (rs=0.620) and weak correlation in osteoarthritis patients (rs=0.313). Conclusion The tightness of cruciate ligaments hasevident impact on the suffering of meniscus injury especially for youth without osteoarthritis. Nevertheless, it is probably not a major determinant resulting in meniscus injury for the elderly with osteoarthritis.