[Biomechanical study of lumbar vertebra during gait cycle in adolescent idiopathic scoliosis].

Q4 Medicine
Yunxin Wang, Ping Xu, Yingsong Wang, Yingliang Liu, Shisen Xu, Zhi Zhao, Hongfei Li, Xiaoming Chen
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引用次数: 0

Abstract

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.

[青少年特发性脊柱侧凸步态周期腰椎的生物力学研究]。
为了研究青少年特发性脊柱侧凸(特发性脊柱侧凸,AIS)患者步态周期中腰椎的力学反应,本研究基于AIS患者的CT数据,分别构建左侧支撑期(ML)和右侧支撑期(MR)模型。首先,设置材料特性、边界条件和载荷,模拟腰椎-骨盆模型;然后,根据应力和位移云图比较ML和MR腰椎应力和位移的差异。结果表明,ML组腰椎应力主要分布在凸侧,MR组腰椎应力主要分布在凹侧。两种应力类型的应力主要集中在椎弓根板附近,并且随着步态的进展椎弓根板的应力通过椎弓根传递到椎体。MR椎间组织的平均应力大于ML,且凸侧和凸侧的应力差异更大。ML患者腰椎移位从L1到L5逐渐减小。mr则相反。总之,本研究可以准确量化步态时腰椎所受的压力,可为支具设计和临床决策提供指导。
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来源期刊
生物医学工程学杂志
生物医学工程学杂志 Medicine-Medicine (all)
CiteScore
0.80
自引率
0.00%
发文量
4868
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