Design and Biomechanical Analysis of Porous Intervertebral Fusion Apparatus Based on 3D Printing Technology

依据腰椎的原始数据，通过Mimics和Geomagics软件分别重建了腰椎C3和C4的模型，得到腰椎模型的基本数据。分别建立了简单立方多孔、体心立方多孔、面心立方多孔椎间融合器。对椎间融合器施加成年人腰部所受最大力并通过有限元分析求解应力、应变以及最大形变量。计算设计的椎间融合器的弹性模量、对不同孔隙率的多孔椎间融合器进行分析并优化设计结果。Based on the original data of the lumbar spine, the models of C3 and C4 of the lumbar spine were reconstructed by Mimics and Geomagics software, respectively, to obtain the basic data of the lumbar spine model. The simple cubic porous, body-centered cubic porous and face-centered cubic interbody fusion apparatus were established respectively. The maximum force on the lumbar of an adult was applied to the interbody fusion device and the stress, strain and maximum shape variables were calculated by finite element analysis. The elastic modulus of the designed interbody fusion cage was calculated, and the porous interbody fusion cage with different porosity was analyzed and the design results were optimized.