脊柱腰段正常及骨质疏松三维有限元数字模型的建立

背景：建立逼真的有限元模型是对脊柱进行有限元力学分析的重要基础，关于骨质疏松有限元模型的报道尚少。目的：建立脊柱腰段各主要结构及骨质疏松腰椎的有限元数字模型，为正常脊柱腰段及骨质疏松患者腰椎的有限元力学分析打下基础。方法t对1名健康男性志愿者行脊柱腰段的螺旋CT扫描，将所得图像先在Mimics中进行分隔和重建，在Geomagic中进行优化，在Ansys中赋材质及网格划分，建立三维有限元数字模型。结果与结论：建立了包括全部腰椎、椎间盘及主要韧带的正常腰椎及骨质疏松腰椎三维有限元数字模型。该模型外形逼真，几何相似性好，可以随意旋转，方便从多角度观察、采集三维信息，各主要结构材料属性接近实际，适合进行生物力学研究。提示利用CT数据及mimics、geomagic、Ansys软件可以建立脊柱腰段正常及骨质疏松有限元数字模型。

Establishment of normal lumbar and osteoporosisthree-dimensional finite element models

BACKGROUND： Establishment of a realistic finite element model is the important basis for the finite element mechanics analysis of the spine, The reports on the finite element model of osteoporosis are less. OBJECTIVE： To establish the main composition of the normal lumbar spine and osteoporosis lumbar vertebrae finite element digital model in order to lay the foundation for the finite element analysis of the normal lumbar spine and lumbar vertebrae of osteoporosis patients. METHODS： One healthy male volunteer received the spiral CT scan on the lumbar spine, then the pictureswere separated and reconstructed in Mimics, optimized in Geomagic, assigned material and meshed in Ansys and finally the three-dimensional finite element digital model was established. RESULTS AND CONCLUSION： The three-dimensional finite element digital models were established, including the lumbar spine, the intervertebral disc and the main ligament of normal and osteoporotic lumbar spine. This model was living with appearance, perfect With similarity. It could revolve arbitrary, so that the researchers could observe and collect the three-dimensional information from multiple perspectives, and the main structural and material properties were closed to the actual properties, which is suitable for biomechanical study. The CT data which is software （mimics, were geomagic and Ansys） can used to establish the normal lumbar spine and osteoporosis finite element digital models.