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本研究以一名10岁龄男童颈椎CT DICOM数据包为例,将数据导入MIMICS进行图像分割处理,得到优化的硬组织表面模型,再导入有限元前处理软件Hypermesh行颈椎C_0~C_2各部分网格的划分、建立颈椎韧带模型并对各部分赋材质、单元属性,建立了颈椎C_0~C_2有限元整体模型,最后导入有限元软件ANSYS14.0中行载荷计算和结论分析。进一步在模拟生理载荷下(颅底垂直加载30 N预压力,1.0 Nm力矩)测定上颈椎模型各节段(C_0~C_1,C_1~C_2)的前屈、后伸、侧屈、旋转的三维运动范围,将所得结论与文献结论进行对比,验证所建模型的有效性。研究表明,本研究成功建立了一个外观逼真的儿童上颈椎有限元模型,模拟生理载荷并测量出上颈椎各节段角位移量,较好的通过了有效性的验证,我们所建立的儿童上颈椎有限元模型几何相似性较好,对进一步用来进行生物力学研究具有重要的参考价值。
In this study, a 10-year-old boy with cervical CT DICOM data package as an example, the data into the MIMICS image segmentation processing, the optimized hard tissue surface model, and then into the finite element preprocessing software Hypermesh cervical C_0 ~ C_2 various parts The model of cervical vertebra ligament was established and the material and unit properties were assigned to each part. The C_0 ~ C_2 finite element model of cervical vertebra was established. Finally, the finite element software ANSYS14.0 was used to calculate the load and the conclusion analysis. The three-dimensional motion of flexion, extension, lateral flexion and rotation of each segment (C_0 ~ C_1, C_1 ~ C_2) of the upper cervical vertebra model was further measured under the simulated physiological load (30 N preload and 1.0 Nm moment of vertical loading) Range, the conclusions obtained are compared with the conclusions of the literature to verify the validity of the model. The study shows that this study successfully established a realistic upper cervical finite element model of children, simulated physiological load and measured the angular displacement of the upper cervical spine, the better passed the validation of the validity of the children we established The finite element model of cervical vertebra has good geometric similarity and has important reference value for further research on biomechanics.