Zak Małgorzata, Pezowicz Celina
Division of Biomedical Engineering and Experimental Mechanics, Department of Mechanical Engineering, Wrocław University of Technology, Poland.
Acta Bioeng Biomech. 2013;15(1):51-9.
The annulus fibrosus is the primary load-bearing component of the intervertebral disc responsible for proper transfer of loads in the spine. The aim of this study was to determine selected mechanical parameters of multilayer specimens of the annulus fibrosus of the intervertebral disc during uniaxial tensile loading. The anatomical location (anterior/posterior) of the test specimens of the annulus fibrosus and its location along the length of the spine were analysed to determine their impact on the maximum failure force, stiffness, the value of Young's modulus and dissipated energy. The results indicated high energy losses over the five consecutive precondition loops while the value of the force remained at a constant level. The thoracic and lumbar specimens showed the highest values of the parameters analysed. There were also significant changes depending on the anatomical region of the intervertebral disc, where anterior specimens demonstrated higher mechanical values compared to posterior specimens.
纤维环是椎间盘的主要承重部件，负责脊柱中负荷的适当传递。本研究的目的是确定椎间盘纤维环多层标本在单轴拉伸加载过程中的选定力学参数。分析了纤维环测试标本的解剖位置（前部/后部）及其沿脊柱长度的位置，以确定它们对最大破坏力、刚度、杨氏模量值和耗散能量的影响。结果表明，在连续五个预处理循环中能量损失较高，而力的值保持在恒定水平。胸椎和腰椎标本显示出所分析参数的最高值。根据椎间盘的解剖区域也有显著变化，其中前部标本的力学值高于后部标本。
