Pramudita Jonas A, Hiroki Wataru, Yoda Takuya, Tanabe Yuji
College of Engineering, Nihon University, Koriyama 963-8642, Japan.
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
Life (Basel). 2022 May 16;12(5):740. doi: 10.3390/life12050740.
Distal radial fractures exhibit various fracture patterns. By assuming that the strain distribution at the distal radius affects the diversification of the fracture pattern, a parameter study using the finite element model of a wrist developed from computed tomography (CT) images was performed under different loading conditions. The finite element model of the wrist consisted of the radius, ulna, scaphoid, lunate, triquetrum, and major carpal ligaments. The material properties of the bone models were assigned on the basis of the Hounsfield Unit (HU) values of the CT images. An impact load was applied to the scaphoid, lunate, and triquetrum to simulate boundary conditions during fall accidents. This study considered nine different loading conditions that combine three different loading directions and three different load distribution ratios. According to the analysis results, the strain distribution at the distal radius changed with respect to the change in the loading condition. High strain concentration occurred in regions where distal radius fractures are commonly developed. The direction and distribution of the load acting on the radius were considered to be factors that may cause variations in the fracture pattern of distal radius fractures.
桡骨远端骨折呈现出多种骨折类型。假设桡骨远端的应变分布会影响骨折类型的多样化，在不同加载条件下，利用从计算机断层扫描（CT）图像构建的腕关节有限元模型进行了参数研究。腕关节的有限元模型包括桡骨、尺骨、舟骨、月骨、三角骨和主要的腕骨韧带。骨模型的材料属性根据CT图像的亨氏单位（HU）值来指定。对舟骨、月骨和三角骨施加冲击载荷，以模拟跌倒事故中的边界条件。本研究考虑了九种不同的加载条件，这些条件由三种不同的加载方向和三种不同的载荷分布比例组合而成。根据分析结果，桡骨远端的应变分布随加载条件的变化而变化。在桡骨远端骨折常见的区域出现了高应变集中。作用于桡骨的载荷方向和分布被认为是可能导致桡骨远端骨折类型变化的因素。
