不同载荷条件下半月板动态仿真生物力学分析

发布时间：2018-03-04 19:50

  本文选题：半月板　切入点：胫骨　出处：《中国组织工程研究》2017年11期 　论文类型：期刊论文

【摘要】：背景:目前临床上半月板的损伤较为常见,其可导致严重的膝关节损伤。目前,关于半月板生物力学的研究已有报道,但不同载荷条件下半月板动态仿真模拟生物力学特性的研究还未见报道。目的:应用有限元法仿真模拟并分析不同载荷条件下膝关节半月板的生物力学特性。方法:基于正常成人志愿者膝关节MRI数据建立全膝关节三维有限元模型,通过分别对模型股骨施加300,400及500 N垂直载荷,动态仿真模拟分析步态下膝关节不同屈曲角度时半月板的应力、位移分布及变化情况。结果与结论:(1)在分别载荷300,400及500 N条件下,膝关节正常动态屈曲过程中0°,30°,60°,90°时最大应力点均从内侧半月板后角胫骨附着面前缘移动到外侧半月板前角胫骨附着面后缘;最大位移点均从接近内侧半月板内缘中点的地方移动到外侧半月板前外上缘;且外侧半月板应力及位移范围大于内侧半月板,同时应力及位移分布范围与载荷的大小及屈曲角度大小成正比;(2)结果表明,膝关节半月板三维有限元模型可以有效的动态仿真模拟半月板在不同载荷条件下的受力及位移分布情况,可为临床中半月板损伤机制的推测提供依据。
[Abstract]:Background: meniscus injuries are common in clinical practice and can lead to severe knee injuries. At present, the biomechanics of meniscus has been reported. But the biomechanical characteristics of meniscus dynamic simulation under different loads have not been reported. Objective: to simulate and analyze the biomechanical characteristics of knee meniscus under different loads by finite element method. Methods: based on the MRI data of knee joint of normal adult volunteers, a three-dimensional finite element model of total knee joint was established. By applying 300,400 and 500N vertical loads to the model femur, the stress, displacement distribution and changes of meniscus under different flexion angles of knee joint under gait were analyzed by dynamic simulation. Results and conclusions: under the loading of 300,400 N and 500 N, respectively, the stress and displacement of meniscus were analyzed. During the normal dynamic flexion of the knee joint, the maximum stress points of 0 掳30 掳and 60 掳~ 90 掳were moved from the anterior edge of the tibial attachment to the posterior edge of the tibial attachment of the medial meniscus posterior angle to the anterior angle of the lateral meniscus. The maximum displacement points moved from the point near the middle point of the inner edge of the medial meniscus to the anterior and upper edge of the lateral meniscus, and the stress and displacement range of the lateral meniscus was larger than that of the medial meniscus. At the same time, the distribution range of stress and displacement is proportional to the magnitude of load and buckling angle. The three-dimensional finite element model of knee meniscus can be used to simulate the stress and displacement distribution of meniscus under different load conditions, which can provide a basis for the prediction of meniscus injury mechanism in clinic.
【作者单位】： 昆明医科大学第一附属医院麻醉科;常州市第四人民医院骨科;
【基金】：常州市应用基础研究计划项目(CJ20130049)~~
【分类号】：R318.01;R684
，

本文编号：1567053