非持续载荷下椎间盘的多孔弹性特性  

Poroelastic Characteristics of Intervertebral Disc Under Intermittent Load

作　　者：李睿[1] 郭立新[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第4期573-577,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51135003;50875041);教育部高等学校博士学科点专项科研基金资助项目(20100042110013);中央高校基本科研业务费专项资金资助项目(N110403008);辽宁省自然科学基金资助项目(201102071)

摘　　要：建立了人体L4/L5段腰椎关节椎间盘多孔弹性有限元模型,并在持续压缩和间歇性压缩载荷作用情况下进行仿真分析,并且将其与相同工况下退化的椎间盘模型进行对比.结果表明,同样状态的椎间盘由于间歇时间的存在,盘的变形和有效应力都相对减小,而孔压值增大.退化的椎间盘由于盘的刚度增加,盘高度和初始孔隙率减小等原因,导致其孔压值和有效应力的变化速度都要比健康的椎间盘快.A poroelastic finite element model was developed to analyze the biomechanical characteristics of the human spine L4/L5 segment under continuous/intermittent loads, and the results were compared with those of a degenerated model under the same working conditions. The results showed that with the existence of the resting time, the deformation and the effective stress of the intervertebral disc decreased, while the pore pressure increased. Moreover, due to the increased stiffness and the decreased height and initial pore ratio of the degenerated disc, the changing rate of the pore pressure and the effective stress are faster than those of the healthy disc.

关 键 词：脊椎椎间盘 多孔弹性有限元模型 非持续载荷 L4 L5段腰椎关节 退化的椎间盘 

分 类 号：TB17[生物学—生物工程]