不同屈曲状态下膝关节韧带生物力学的有限元分析

发布时间：2018-03-07 03:27

本文选题：有限元分析　切入点：膝关节　出处：《中国运动医学杂志》2015年07期 　论文类型：期刊论文

【摘要】：目的:利用有限元法分析膝关节在不同屈曲角度受力后,前、后交叉韧带,内、外侧副韧带的生物力学特点。方法:选取1名健康成年男性为研究对象,建立其包含骨、韧带、半月板和软骨的左膝关节仿真三维有限元模型;模拟膝关节在不同屈曲角度下,分别对股骨加载后向134N的力、内外翻10Nm的力矩,以及外翻10Nm加内旋5Nm的联合力矩,分析前交叉韧带(ACL)、后交叉韧带(PCL)、内侧副韧带(MCL)、外侧副韧带(LCL)的应力分布及大小变化情况。结果:对股骨加载后向134N应力后,膝关节在屈曲0°、30°、60°和90°位时,ACL所受应力最大,PCL的应力最小,MCL的最大应力大于LCL,均随屈曲角度的增大而减小;施加外翻应力时,MCL所受应力最大,其次为ACL、PCL,LCL应力最小;内翻时,LCL所受应力最大,其次为PCL、ACL,MCL应力最小;联合应力时,MCL应力最大,其次为ACL,远远大于PCL和LCL的应力,除PCL之外,其他各韧带的应力随屈曲角度的增大而减小。结论:膝关节三维有限元模型可以模拟膝关节不同运动状态下的不同受力情况,可以有效地分析膝关节韧带在不同运动状态下的生物力学特性并推测其损伤机制。所有韧带的应力分布和大小随着不同屈曲角度发生不同改变,损伤风险也发生相应改变。
[Abstract]:Objective: to analyze the biomechanical characteristics of anterior, posterior cruciate, medial and lateral collateral ligaments of knee joint under different flexion angles by finite element method. Three dimensional finite element model of left knee joint of meniscus and cartilage was simulated, and the force of 134N, the torque of 10Nm and the joint torque of 10Nm and 5Nm were simulated under different flexion angles, respectively. The stress distribution and size of anterior cruciate ligament (ACLL), posterior cruciate ligament (PCL), medial collateral ligament (MCLL) and lateral collateral ligament (LCLL) were analyzed. The maximum stress of ACL was greater than that of LCLL and the maximum stress of MCL decreased with the increase of flexion angle when the flexion was 0 掳30 掳60 掳and 90 掳, the stress of MCL was the most when applied valgus stress, the second was the minimum stress of ACL-PCLL. The stress of PCL is the largest, the stress of PCL is the smallest, and the stress of PCL and LCL is the highest when combined stress is combined, which is far greater than that of PCL and LCL, except for PCL, the stress of PCL is higher than that of LCL, and the stress of LCL is higher than that of PCL and LCL. The stress of the other ligaments decreases with the increase of the flexion angle. Conclusion: the three-dimensional finite element model of the knee joint can be used to simulate the different stress situations of the knee joint in different motion states. The biomechanical characteristics of the knee joint ligament under different motion states can be effectively analyzed and the damage mechanism can be speculated. The stress distribution and size of all the ligaments vary with different flexion angles and the injury risk changes accordingly.
【作者单位】：昆明医科大学第一附属医院运动医学科;昆明医科大学第一附属医院医学影像科;
【基金】：云南省科技厅国际合作项目(2013IA004) 云南省科技厅社会发展项目(2009CA020) 云南省医学学科带头人培养基金(D-201207)
【分类号】：R87

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