人体膝关节股胫关节运动特性分析
发布时间：2018-11-03 17:28
【摘要】：目的分析人体正常膝关节和人工膝关节高屈曲活动下股胫关节的运动,为膝关节运动特性研究、假体设计提供参考。方法选取健康志愿者,利用CT和MRI扫描数据建立正常全膝关节三维有限元模型以及TKA术后有限元模型,采取三束股四头肌肌力非同步变力加载,模拟人体下蹲运动,以分析股胫关节的相对运动特性,并检索相关研究结果以便对比分析。结果获得正常膝关节以及TKA术后人体下蹲过程中股骨相对胫骨的三维相对运动数据,结果表明,TKA术前、后股胫关节相对运动的总体趋势相近,同时在前后位移、远近位移、内外位移、内收外展和内外旋等最大值方面存在差异;同时通过对比分析TKA前后股胫关节相对运动以及相关文献数据,发现结果存在不同程度差异。结论究其原因,正常膝关节相对运动差异主要在于股胫关节各个运动方向上和不同屈曲度时约束程度的改变;人工膝关节相对运动差异主要来源于膝关节型面和结构的改变;同时与坐标系的定义、在体和离体的差异、负荷加载的差异相关。本研究针对人体正常膝关节和TKA术后膝关节股胫关节运动进行有限元仿真分析,对膝关节运动特性研究具有一定的参考价值。
[Abstract]:Objective to analyze the motion of femoral tibial joint under high flexion of human knee joint and artificial knee joint, and to provide reference for the study of knee joint motion characteristics and prosthesis design. Methods three dimensional finite element model of normal total knee joint and finite element model after TKA were established by using CT and MRI scanning data of healthy volunteers. Three bundle quadriceps muscle force was loaded asynchronously to simulate human squat motion. To analyze the relative motion characteristics of tibial joint, and search the related results for comparative analysis. Results three dimensional relative motion data of femur relative to tibia were obtained during squatting of normal knee joint and human body after TKA. The results showed that the general trend of relative motion of posterior femur tibial joint before TKA was similar, and the relative movement of posterior femur tibial joint was similar in front and back displacement, far and near displacement at the same time. There are differences in the maximum values of internal and external displacement, internal and external abduction and internal and external rotation. At the same time, the relative motion of tibial joint before and after TKA and related literature data were analyzed, and the results were found to be different in different degrees. Conclusion the difference of relative motion of normal knee joint is mainly due to the change of constraint degree in different movement direction and different flexion of femoral tibial joint, and the difference of relative motion of artificial knee joint mainly comes from the change of shape and structure of knee joint. At the same time, it is related to the definition of coordinate system, the difference between in vivo and in vitro, and the difference of load loading. In this study, finite element simulation analysis of knee joint motion after TKA and normal knee joint is carried out, which has a certain reference value for the study of knee joint motion characteristics.
【作者单位】： 河南理工大学机械与动力工程学院;河南理工大学医学院;
【基金】：国家自然科学基金重点项目(C100309)
【分类号】：R684
本文编号：2308459
[Abstract]:Objective to analyze the motion of femoral tibial joint under high flexion of human knee joint and artificial knee joint, and to provide reference for the study of knee joint motion characteristics and prosthesis design. Methods three dimensional finite element model of normal total knee joint and finite element model after TKA were established by using CT and MRI scanning data of healthy volunteers. Three bundle quadriceps muscle force was loaded asynchronously to simulate human squat motion. To analyze the relative motion characteristics of tibial joint, and search the related results for comparative analysis. Results three dimensional relative motion data of femur relative to tibia were obtained during squatting of normal knee joint and human body after TKA. The results showed that the general trend of relative motion of posterior femur tibial joint before TKA was similar, and the relative movement of posterior femur tibial joint was similar in front and back displacement, far and near displacement at the same time. There are differences in the maximum values of internal and external displacement, internal and external abduction and internal and external rotation. At the same time, the relative motion of tibial joint before and after TKA and related literature data were analyzed, and the results were found to be different in different degrees. Conclusion the difference of relative motion of normal knee joint is mainly due to the change of constraint degree in different movement direction and different flexion of femoral tibial joint, and the difference of relative motion of artificial knee joint mainly comes from the change of shape and structure of knee joint. At the same time, it is related to the definition of coordinate system, the difference between in vivo and in vitro, and the difference of load loading. In this study, finite element simulation analysis of knee joint motion after TKA and normal knee joint is carried out, which has a certain reference value for the study of knee joint motion characteristics.
【作者单位】： 河南理工大学机械与动力工程学院;河南理工大学医学院;
【基金】：国家自然科学基金重点项目(C100309)
【分类号】：R684
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