摘要
背景:椎旁肌肉对于维持脊柱平衡起着至关重要的作用,骨肌有限元模型更加接近人体生物力学环境,但目前脊柱有限元分析中肌肉建模比较复杂或将肌肉力简化处理。目的:对椎旁肌模型进行快速建立,并进行肌肉力的加载分析。方法:基于逆向工程原理,通过CT图像数据进行脊柱模型的三维重建,对竖脊肌中的腰部最长肌及韧带通过弹性模量、肌肉生理横截面积及肌线平均长度进行弹簧刚度的计算,通过上下附着点进行肌肉建模;对建立的有限元模型进行生物力学验证,施加4 N·m的弯矩模拟腰椎进行前屈后伸、左右侧弯、左右旋转。结果与结论:①生物力学验证表明腰椎L_(4)-L_(5)在受轴向载荷作用下表现出弹性性质;②通过对腰椎进行前屈后伸、左右侧弯、左右旋转分析,证实建立了符合腰椎活动度的骨肌有限元模型;③带肌肉组织的腰椎有限元模型建模简单且符合人体生物力学特性,可为接下来分析脊柱在矫形力加载下的变化提供参考。
BACKGROUND:Paravertebral muscles play an important role in maintaining spinal balance.The finite element model of skeletal muscle is more close to the biomechanical environment of human body.However,the muscle modeling in the finite element analysis of the spine is more complex or the muscle force is simplified in the current finite element analysis of the spine.OBJECTIVE:To quickly establish the paravertebral muscle model and analyze loading of muscle force.METHODS:Based on the principle of reverse engineering,the three-dimensional reconstruction of the spine model was carried out through CT image data.The spring stiffness of the longest lumbar muscle and ligament in the erector spinalis muscle was calculated through the elastic modulus,muscle crosssectional area and average length of muscle line.The muscle modeling was carried out through the upper and lower attachment points,and the biomechanical verification of the established finite element model was carried out.The lumbar spine was simulated by applying a bending moment of 4 N•m for flexion and extension,left and right lateral bending,left and right rotation.RESULTS AND CONCLUSION:(1)Biomechanical verification showed that L_(4)-L_(5) showed elastic properties under axial load.(2)Through the analysis of lumbar flexion and extension,left-right lateral bending and left-right rotation,a finite element model of skeletal muscle was established,which was consistent with the range of motion of lumbar spine.(3)The finite element model of lumbar spine with muscle tissue conforms to the biomechanical characteristics of human body,which provides a reference for analyzing the changes of the spine under orthopedic force.
作者
关天民
陈向禹
朱晔
Guan Tianmin;Chen Xiangyu;Zhu Ye(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,Liaoning Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2021年第27期4307-4311,共5页
Chinese Journal of Tissue Engineering Research
关键词
腰椎
生物力学
骨肌模型
CT数据
图像分割
逆向工程
有限元
lumbar spine
biomechanics
skeletal muscle model
CT data
image segmentation
reverse engineering
finite element
