Zhu Dong, Dong Xin, Zhu Xinghua, Li Rui, Huang Wangtong, Wang Chunyu, Cui Haifeng
Department of Bone Surgery, No. 208 Hospital of PLA of China, Changchun 130062, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2006 Apr;23(2):290-4.
We tested the mechanical properties of fiber layers in adult anulus fibrosus of lumbar interverbral disc 4,5. Aulus fibrosus of lumbar interverbral disc was delaminated by using microsurgical technique. 8 testing points were taken in each layer according to the fibers going and 5 testing specimens were taken from each testing point. The length was 15-20mm, the width 1-2mm, and the thickness 0. 1-0. 5mm. By using tension test,the relationship curves of stress and strain were tested, the fitting curves and equations were obtained, and then the elastic modulus, damage strain and damage stress were obtained. Therefore we knew the parameters and equations of mechanical properties of each testing point. We got the result that the elastic modulus of each testing point, along the radius from outside to inside, decreased with the increase of layers. The damage stress decreased linearly from outside to inside. The damage strains of the outside 9 layers increased slightly with the increase of layers, and the others were almost constants, i. e. 0.34 +/- 0.14. We get the conclusion that analus fibrosus of intervertebral disc has special mechanical properties corresponding with its functions, which is in a close relationship with lumbar vertebral diseases.
我们测试了成人第4、5腰椎椎间盘纤维环中纤维层的力学性能。采用显微外科技术将腰椎间盘纤维环分层。根据纤维走向在每层取8个测试点，每个测试点取5个测试样本。样本长度为15 - 20毫米，宽度为1 - 2毫米，厚度为0.1 - 0.5毫米。通过拉伸试验，测试应力与应变的关系曲线，得到拟合曲线和方程，进而得出弹性模量、损伤应变和损伤应力。由此我们了解了每个测试点力学性能的参数和方程。我们得到的结果是，每个测试点的弹性模量沿半径从外向内随着层数的增加而降低。损伤应力从外向内呈线性下降。外层9层的损伤应变随层数增加略有增加，其他层几乎恒定，即0.34±0.14。我们得出结论，椎间盘纤维环具有与其功能相对应的特殊力学性能，这与腰椎疾病密切相关。
