后交叉韧带断裂对半月板生物力学影响的三维有限元分析
发布时间：2019-04-29 06:12
【摘要】：目的：1、建立包括后交叉韧带(posterior cruciate ligament,PCL)和半月板及其他主要结构在内的人全膝关节三维有限元模型并验证其有效性；2、通过已验证的膝关节有限元模型探讨后交叉韧带完全断裂后对半月板应力的影响,明确后交叉韧带完全断裂前后半月板承受的应力及其分布情况,为后交叉韧带损伤早期重建和预防继发半月板损伤退变甚至骨关节炎提供理论依据。 方法：1、选取一名正常男性志愿者的膝关节行CT和MRI扫描获取骨骼和软组织的影像学数据,使用E-feature Biomedical Modeler有限元处理软件建立正常膝关节三维有限元实体模型,定义边界条件和材料属性后将其导入ANSYS有限元分析软件进行有效性验证；2、设定加载条件,在模型上加载1150N垂直负荷条件下同时分别在胫骨加载134N后向负荷和5Nm外旋力矩,计算并记录完整膝关节和去除后交叉韧带膝关节模型中半月板峰值应力变化情况和等效应力分布云图并进行比较。 结果：1.成功构建了正常人膝关节三维有限元模型并通过了有效性验证,在模型上可以仿真模拟PCL完全断裂；2.后交叉韧带完全断裂后,在1150N股骨轴向负荷和134N胫骨后向负荷加载下,内侧半月板峰值应力增加19.79%,外侧半月板增加33.41%；3.后交叉韧带完全断裂后,在1150N股骨轴向负荷和5Nm胫骨外旋力矩加载下,内侧半月板峰值应力增加17.82%,外侧半月板增加30.21%。 结论：1.利用CT、MRI数据和E-feature Biomedical Modeler软件建立的正常人膝关节三维有限元模型真实可靠；2.在三维有限元研究中PCL完全断裂后对内、外侧半月板生物力学均有不良影响,施以后向负荷与外旋力矩时,外侧半月板应力集中更明显。3.PCL完全断裂后半月板可能发生慢性损伤,外侧半月板发生慢性损伤几率较高,提示早期行PCL重建术有可能对半月板继发损伤和退变起到预防作用。
[Abstract]:Objective: 1. To establish a three-dimensional finite element model of total knee joint, including posterior cruciate ligament (posterior cruciate ligament,PCL), meniscus and other major structures, and to verify its effectiveness; 2. The influence of complete rupture of posterior cruciate ligament on meniscus stress was discussed by the verified finite element model of knee joint, and the stress and its distribution of meniscus before and after complete rupture of posterior cruciate ligament were determined. It provides theoretical basis for early reconstruction of posterior cruciate ligament injury and prevention of secondary meniscus injury and even osteoarthritis. Methods: 1. The imaging data of bone and soft tissue were obtained by CT and MRI scanning in the knee joint of a normal male volunteer. The 3D finite element solid model of normal knee joint was established by using E-feature Biomedical Modeler finite element software. The boundary conditions and material properties are defined and imported into ANSYS finite element analysis software to verify their validity. 2, setting loading conditions, loading 1150N vertical load on the model at the same time loading 134N backward load and 5Nm outward rotation moment at the same time, respectively. The variation of meniscus peak stress and the distribution of equivalent stress in intact knee joint and removed posterior cruciate ligament knee model were calculated and recorded and compared. Results: 1. The three-dimensional finite element model of normal knee joint was successfully constructed and proved to be effective, and the complete fracture of PCL can be simulated on the model. After complete rupture of the posterior cruciate ligament, the peak stress of medial meniscus and lateral meniscus increased by 19.79% and 33.41% respectively under 1150N axial load of femoral bone and 134N posterior load of tibia. After complete rupture of the posterior cruciate ligament, the peak stress of medial meniscus and lateral meniscus increased by 17.82% and 30.21% respectively under the loading of 1150N femoral axial load and 5Nm external rotation moment. Conclusion: 1. The 3D finite element model of normal knee joint established by using CT,MRI data and E-feature Biomedical Modeler software is true and reliable. In the three-dimensional finite element study, the biomechanics of the lateral meniscus and the internal and external meniscus after the complete fracture of PCL have a bad effect. The stress concentration of lateral meniscus is more obvious. 3. Chronic injury of lateral meniscus may occur after complete rupture of PCL, and the probability of chronic injury of lateral meniscus is higher than that of lateral meniscus. It is suggested that early PCL reconstruction may play an important role in preventing meniscus secondary injury and degeneration.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R686.5
本文编号：2467999
[Abstract]:Objective: 1. To establish a three-dimensional finite element model of total knee joint, including posterior cruciate ligament (posterior cruciate ligament,PCL), meniscus and other major structures, and to verify its effectiveness; 2. The influence of complete rupture of posterior cruciate ligament on meniscus stress was discussed by the verified finite element model of knee joint, and the stress and its distribution of meniscus before and after complete rupture of posterior cruciate ligament were determined. It provides theoretical basis for early reconstruction of posterior cruciate ligament injury and prevention of secondary meniscus injury and even osteoarthritis. Methods: 1. The imaging data of bone and soft tissue were obtained by CT and MRI scanning in the knee joint of a normal male volunteer. The 3D finite element solid model of normal knee joint was established by using E-feature Biomedical Modeler finite element software. The boundary conditions and material properties are defined and imported into ANSYS finite element analysis software to verify their validity. 2, setting loading conditions, loading 1150N vertical load on the model at the same time loading 134N backward load and 5Nm outward rotation moment at the same time, respectively. The variation of meniscus peak stress and the distribution of equivalent stress in intact knee joint and removed posterior cruciate ligament knee model were calculated and recorded and compared. Results: 1. The three-dimensional finite element model of normal knee joint was successfully constructed and proved to be effective, and the complete fracture of PCL can be simulated on the model. After complete rupture of the posterior cruciate ligament, the peak stress of medial meniscus and lateral meniscus increased by 19.79% and 33.41% respectively under 1150N axial load of femoral bone and 134N posterior load of tibia. After complete rupture of the posterior cruciate ligament, the peak stress of medial meniscus and lateral meniscus increased by 17.82% and 30.21% respectively under the loading of 1150N femoral axial load and 5Nm external rotation moment. Conclusion: 1. The 3D finite element model of normal knee joint established by using CT,MRI data and E-feature Biomedical Modeler software is true and reliable. In the three-dimensional finite element study, the biomechanics of the lateral meniscus and the internal and external meniscus after the complete fracture of PCL have a bad effect. The stress concentration of lateral meniscus is more obvious. 3. Chronic injury of lateral meniscus may occur after complete rupture of PCL, and the probability of chronic injury of lateral meniscus is higher than that of lateral meniscus. It is suggested that early PCL reconstruction may play an important role in preventing meniscus secondary injury and degeneration.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R686.5
【参考文献】
相关期刊论文 前1条
1 焦晨,于长隆,敖英芳;单纯后交叉韧带断裂继发关节内损伤的临床研究[J];中国运动医学杂志;2003年04期
，本文编号：2467999
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