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Experimental Study on Stress Relaxation and Creep Properties of Human Thoracolumbar Vertebral Bodies and Intervertebral Discs
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作者 HUANG Jian-song HUA Hong-xing +1 位作者 WANG Yi-jin CHEN Yong 《Chinese Journal of Biomedical Engineering(English Edition)》 2009年第4期154-161,共8页
Objective:Underwater shock can produce extremely high accelerations, resulting in severe human injuries on shipboard, and human thoraco lumbar spines are prone to suffer from injuries by ship shock motion. To observe ... Objective:Underwater shock can produce extremely high accelerations, resulting in severe human injuries on shipboard, and human thoraco lumbar spines are prone to suffer from injuries by ship shock motion. To observe the viscoelasticity of thoracolumbar of young fresh cadavers, and to provide biomechanical parameters for both research and clinical practice. Materials and Methods:5 fresh young male cadavers (aged 22 to 31 years) were provided, and 15 thoracolumbar spinal anatomies of 5 samples were harvested within 1 hour of death. WE-10A universal testing machine was used for creep and relaxation tests.Results:Stress relaxation and creep deformation equations are derived from the biomechanics model and the measured and simulated curves are compared. The creep in vertebral bodies and intervertebral discs exhibited significantly changes in the first 5 min and 10 min, respectively. The stress rapidly decreased in the first 2 min, and then gradually went balance during the relaxation process. Conclusion:The change in creep rate is significant at early stage,and gradually slows down.This indicates that the differences between internal pressure and local pressure are decreased until balance. The simulated curve derived from equation coincides with the experimental data to a large degree, which states that the equation is rational and reliable. 展开更多
关键词 spine biomechanics functional spinal unit (FSU) vertebral body intervertebral disc stress relaxation creep deformation spring-dashpot
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Removal versus preservation of the posterior longitudinal ligament in Bryan cervical disc arthroplasty 被引量:1
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作者 Yang Da-long Ding Wen-yuan +3 位作者 Zhang Ying-ze Zhang Wei Xu Jia-xin Shen Yong 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第20期3812-3816,共5页
Background Bryan cervical disc arthroplasty can be used to restore and maintain the mobility and function of the involved cervical spinal segments. The efficiency of posterior longitudinal ligament (PLL) resection i... Background Bryan cervical disc arthroplasty can be used to restore and maintain the mobility and function of the involved cervical spinal segments. The efficiency of posterior longitudinal ligament (PLL) resection in anterior cervical decompression and fusion has been demonstrated. However, no clinical reports have compared PLL removal with preservation in Bryan cervical disc arthroplasty. This study aimed to assess the role of removal of PLL in Bryan cervical disc arthroplasty at an 18-month follow-up. 展开更多
关键词 posterior longitudinal ligament Bryan cervical disc arthroplasty functional spinal unit
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