LIANG Zhen,OUYANG Hanbin,ZHENG hong,ZHOU Yaohui,WEI Bo.Modal Analysis of Thoracolumbar Osteoporotic Vertebral Bodies[J].Journal of medical biomechanics,2020,35(4):290-295
胸腰段骨质疏松椎体的模态分析
Modal Analysis of Thoracolumbar Osteoporotic Vertebral Bodies
Received:May 27, 2019  Revised:August 13, 2019
DOI:
Chinese key words:  胸腰段椎体  骨质疏松  模态分析
English Key words:thoracolumbar vertebral body  osteoporosis  modal analysis
Fund project:湛江市科技发展专项资金竞争性分配项目(2018A01036)
Author NameAffiliation
LIANG Zhen Orthopaedic Center, Affiliated Hospital of Guangdong Medical University 
OUYANG Hanbin Orthopaedic Center, Affiliated Hospital of Guangdong Medical University 
ZHENG hong Orthopaedic Center, Affiliated Hospital of Guangdong Medical University 
ZHOU Yaohui Orthopaedic Department, Leizhou People’s Hospital 
WEI Bo Orthopaedic Center, Affiliated Hospital of Guangdong Medical University 
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Chinese abstract:
      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。
English abstract:
      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.
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