Wang Yunxin, Xu Ping, Wang Yingsong, Liu Yingliang, Xu Shisen, Zhao Zhi, Li Hongfei, Chen Xiaoming
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, P. R. China.
Department of Orthopedics, the Second Affiliated Hospital of Kunming Medical University, Kunming 650101, P. R. China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2025 Jun 25;42(3):601-609. doi: 10.7507/1001-5515.202410010.
In order to investigate the mechanical response of lumbar vertebrae during gait cycle in adolescents with idiopathic scoliosis (AIS), the present study was based on computed tomography (CT) data of AIS patients to construct model of the left support phase (ML) and model of the right support phase (MR), respectively. Firstly, material properties, boundary conditions and load loading were set to simulate the lumbar vertebra-pelvis model. Then, the difference of stress and displacement in the lumbar spine between ML and MR was compared based on the stress and displacement cloud map. The results showed that in ML, the lumbar stress was mostly distributed on the convex side, while in MR, it was mostly distributed on the concave side. The stress of the two types of stress mainly gathered near the vertebral arch plate, and the stress of the vertebral arch plate was transmitted to the vertebral body through the pedicle with the progress of gait. The average stress of the intervertebral tissue in MR was greater than that in ML, and the difference of stress on the convex and convex side was greater. The displacement of lumbar vertebrae in ML decreased gradually from L1 to L5. The opposite is true in MR. In conclusion, this study can accurately quantify the stress on the lumbar spine during gait, and may provide guidance for brace design and clinical decision making.
为了研究特发性脊柱侧凸（AIS）青少年在步态周期中腰椎的力学响应，本研究基于AIS患者的计算机断层扫描（CT）数据，分别构建左支撑相模型（ML）和右支撑相模型（MR）。首先，设置材料属性、边界条件和载荷加载以模拟腰椎 - 骨盆模型。然后，基于应力和位移云图比较ML和MR中腰椎的应力和位移差异。结果表明，在ML中，腰椎应力大多分布在凸侧，而在MR中，大多分布在凹侧。两种应力主要集中在椎弓板附近，随着步态的进行，椎弓板的应力通过椎弓根传递到椎体。MR中椎间组织的平均应力大于ML，且凸侧和凹侧的应力差异更大。ML中腰椎从L1到L5的位移逐渐减小。MR中情况相反。总之，本研究能够准确量化步态期间腰椎的应力，并可能为支具设计和临床决策提供指导。
