胸段脊柱侧凸矫形术对腰段脊柱应力影响的有限元分析

目的采用有限元方法,分析胸段脊柱侧凸矫形术后对腰椎应力的影响。方法采用脊柱三维有限元模型模拟计算矫治特发性脊柱侧凸。在患者施行脊柱侧凸矫形术之前对胸段及腰段脊柱进行CT平扫,提取脊椎各节段椎体（胸2-腰5）的结构信息,删除肋骨等非脊柱结构并编辑分离脊柱节段,分别对脊柱侧凸矫形的主要步骤进行模拟并计算其腰段脊柱应力的分布。结果模拟计算结果显示脊柱腰段各椎体之间小关节周围的应力相对均大于模型中其他节段,最大值应力为68.62MPa,位于腰2与腰3之间凹侧椎小关节处。结论通过应力分布分析,腰椎应力较大,在矫形过程中,应充分考虑胸段脊柱侧凸矫形对腰椎的影响。

Effect of thoracic spine scoliosis orthomorphia on stress of lumbar vertebrae:A finite element analysis

Objective To analyze the effect of thoracic spine scoliosis orthomorphia on stress of lumbar vertebrae using the finite element analysis method.Methods Idiopathic scoliosis was simulated using a 3D finite element model.CT scan was performed for spine from T2 to L5.Structure data of spine from T2 to L5 were extracted.Non-spinal structure data including ribs were deleted and the spinal segments were isolated.The main steps of spine scoliosis orthophoria were simulated and the distribution of stress in lumbar ...