腰椎-骨盆-髋关节有限元模型建立及生物力学分析  

Establishment of lumbar-pelvic-hip finite element model and biomechanical analysis

作　　者：文鹏飞 李亚宁 路玉峰 郝林杰[1] 王亚康 马涛[1] 宋伟[1] 张育民[1] Wen Pengfei;Li Yaning;Lu Yufeng;Hao Linjie;Wang Yakang;Ma Tao;Song Wei;Zhang Yumin(Department of Joint Surgery,Honghui Hospital,Xi’an Jiaotong University,Xi’an 710054,Shaanxi Province,China;Department of Radiology,Honghui Hospital,Xi’an Jiaotong University,Xi’an 710054,Shaanxi Province,China)

机构地区：[1]西安交通大学附属红会医院关节外科,陕西省西安市710054 [2]西安交通大学附属红会医院影像科,陕西省西安市710054

出　　处：《中国组织工程研究》2023年第36期5741-5746,共6页Chinese Journal of Tissue Engineering Research

基　　金：陕西省重点研发计划项目社会发展领域(2022SF‑237),项目负责人:张育民。

摘　　要：背景:髋腰疾病的发病率不断增加,给临床治疗带来一定的挑战,需要完善的腰椎-骨盆-髋关节模型以分析其生物力学特点。目的:建立正常成人腰椎-骨盆-髋关节三维有限元模型进行生物力学分析,为研究髋腰疾病和相关手术治疗提供实验依据和参考。方法:获取正常成人CT数据,利用Mimics、Geomagic、Hypermesh、Abaqus等软件构建正常的腰椎-骨盆-髋关节三维有限元模型,将所得模型进行各个工况分析,得到椎体活动度、椎间盘及股骨头应力分布进行模型有效性验证。之后进一步构建坐位模型,比较分析站立位和坐位2种姿势下的生物力学分布特点和变化趋势。结果与结论:①成功建立了正常成人腰椎-骨盆-髋关节三维有限元模型;②构建的模型在各工况分析中结果均在既往文献数据的参考范围内,确认模型有效,可进一步用于后续的实验研究;③从站立位到坐位姿势变化后,L_(4)-L_(5)及L_(5)-S_(1)椎间盘的应力呈上升趋势,其中L5-S1应力变化最明显;对于髋关节应力分布而言,在站立位时,应力在髋臼的前、上、后3个方向都有分布,而在坐位时应力则主要集中在髋臼前部。BACKGROUND:The increasing incidence of hip-lumbar disorders has posed a great challenge to clinical treatment and requires a well-established lumbar-pelvic-hip model to analyze its biomechanical characteristics.OBJECTIVE:To establish a three-dimensional finite element model of the normal adult lumbar-pelvic-hip for biomechanical analysis to provide the experimental basis and reference for the study of hip and lumbar diseases and surgical treatments.METHODS:Normal adult CT data were collected.Mimics,Geomagic,Hypermesh,and Abaqus software were used to construct a three-dimensional finite element model of the lumbar-pelvic-hip.The model was analyzed for each working condition,and the validity of the model was verified by the range of motion of the vertebral body and the stress distribution of the intervertebral disc and femoral head.The seated model was further constructed to compare the biomechanical distribution characteristics and trends between standing and sitting positions.RESULTS AND CONCLUSION:(1)A three-dimensional finite element model of the lumbar-pelvic-hip in a normal adult was successfully established.(2)The results of the model in each working condition were within the reference range of previous literature data,which confirmed the effectiveness of the model and could be used for further experimental studies.(3)Mises stresses in the L4-L_(5)and L_(5)-S_(1)discs showed an increasing trend after the change of posture from standing to sitting,with the most obvious change in L_(5)-S_(1)disc.In terms of hip joint stress distribution,the Mises stresses were distributed in the anterior,superior,and posterior parts of the acetabulum in the standing position,while the stresses were mainly concentrated in the anterior part of the acetabulum in the sitting position.

关 键 词：腰椎 骨盆 髋关节 韧带 有限元 生物力学 应力 数字模型 

分 类 号：R459.9[医药卫生—治疗学] R318[医药卫生—临床医学] R684