基于软骨及韧带的全腕关节生物力学研究.DOCVIP

基于软骨及韧带的全腕关节有限元模型建立及舟状骨生物力学研究 朱海波1 朱建民1马南1 徐旻洋2陈云2 （1 上海市徐汇区中心医院上海徐汇区200031 2 上海交通大学数字医疗实验室上海 200000） 摘要目的：通过基于CT影像数据的包含韧带及软骨的腕关节有限元模型构建、受力分析，在传统仅仅以骨为研究及建模对象的有限元领域做出突破，以期为后期开展全结构、多组织生物力学有限元分析的研究提供参考。方法：运用Mimics、Geomagic Studio、Abaqus等软件采用快速个体化建模方法对1名29岁成年健康男性志愿者的右尺桡骨远端到近端指骨的CT扫描数据进行快速建立模型，施加沿中指轴线的静力载荷和约束，观察米塞斯应力分布情况、最大值及其所处部位。结果：在100N、300N压力下，最大应力分别为1.059x108Pa和3.178x108Pa，并且在不同应力载荷下，腕关节的最大应力及最小应力值部位均相同。不同荷载状态下应力云图显示，舟状骨最大应力值均出现在其腰部区域，这明确解释了临床工作中舟状骨骨折多见于腰部，并且有效验证了本模型的真实性及有效性。结论：采用个体化建模方法可以对腕关节整体结构模型进行运算分析，在模拟韧带结构及软骨结构的分析中，可以采用简化的梁结构及相互作用对实现。 关键词：有限元分析；生物力学；全腕关节；韧带；软骨 Biomechanical study of scaphoid based on finite element analysis of human wrist joint including cartilage and ligament ABSTRACT Objective: finite element model of wrist ligaments and cartilage that contains the image data based on CT Construction, stress analysis, just to make a breakthrough in the traditional bone for the study and finite element modeling of object fields, in order for the latter to carry out the whole structure biomechanical finite element analysis of multi-organizational reference. Methods: Mimics, Geomagic Studio, Abaqus software are using fast individualized approach to a 29-year-old adult healthy male volunteers right radius and ulna distal to the proximal phalanx of the CT scan data for rapid modeling applied along the middle finger static axial loads and constraints concept Chamisesi stress distribution, maximum and which parts. Results:In 100N, 300N pressure, maximum stress were 1.059x108Pa and 3.178x108Pa, and under different stress load, maximum stress and minimum stress values ??are the same parts of the wrist. Under different loading conditions stress cloud shows scaphoid maximum stress occurred at his waist area, which clearly explains the clinical work scaphoid fracture is more common in the waist, and effectively verify the authenticity and validity of the model.Conclusion: The method can be individualized modeling the overall structure of the wrist joint operation