摘要
目的探索胸腰段骨质疏松椎体自由状态的动力学特性。方法根据1名健康女性志愿者胸腰段椎体CT数据,利用计算机辅助处理软件实现模型实体化及椎间盘组织补建,导入ABAQUS 6.14软件中,建立正常胸腰段椎体及胸腰段骨质疏松性椎体有限元模型,并进行模态分析。结果骨质疏松组模型比正常组模型的固有频率降低,振幅增大,随着振动频率增加,模型振动类型由单轴、单向运动转变为多轴、多向运动,且最大振幅责任椎体逐渐下移。结论模态分析能较好分析胸腰段骨质疏松椎体的动力学特性。骨质疏松患者应尽量避免处于特定的振动环境,降低椎间盘组织退变、胸腰部软组织劳损及椎体后部结构病变的风险。
Objective To explore the dynamic characteristics of the thoracolumbar osteoporotic vertebral bodies under free state. Methods Based on CT data from the thoracic and lumbar vertebral body of a healthy female volunteer,model materialization and intervertebral disc tissue reconstruction were realized by using the computerized processing software. The finite element models of normal thoracolumbar vertebral body and thoracolumbar osteoporotic vertebral body were established in ABAQUS 6. 14 to perform modal analysis. Results Compared with the normal model,the osteoporosis model had a lower natural frequency and a lager amplitude.As the vibration frequency increased,the model vibration type changed from uniaxial and unidirectional motion to multiaxial and multidirectional motion,and the responsible vertebral body for the maximum amplitude moved down gradually. Conclusions Modal analysis can better analyze dynamic characteristics of the thoracolumbar osteoporotic vertebral body. Patients with osteoporosis should try to avoid the specific vibration environment,so as to decrease the risk of intervertebral disc tissue degeneration,strain of thoracolumbar soft tissues and lesion in posterior structures of the vertebral body.
作者
梁振
欧阳汉斌
郑鸿
周耀辉
魏波
LIANG Zhen;OUYANG Hanbin;ZHENG hong;ZHOU Yaohui;WEI Bo(Orthopaedic Center,Afiiated Hospital of Guangdong Medical University,Zhanjiang 524000,Guangdong,China;Orthopaedic Department,Leizhou People's Hospital,Zhanjiang 524200,Guangdong,China)
出处
《医用生物力学》
EI
CAS
CSCD
北大核心
2020年第4期290-295,303,共7页
Journal of Medical Biomechanics
基金
湛江市科技发展专项资金竞争性分配项目(2018A01036)。
关键词
胸腰段椎体
骨质疏松
模态分析
thoracolumbar vertebral body
osteoporosis
modal analysis
