Zimmerman M C, Vuono-Hawkins M, Parsons J R, Carter F M, Gutteling E, Lee C K, Langrana N A
University of Medicine and Dentistry of New Jersey, New Jersey Medical School.
Spine (Phila Pa 1976). 1992 Feb;17(2):213-20. doi: 10.1097/00007632-199202000-00016.
A study was initiated to measure the mechanical properties of the canine lumbar spine disc and motion segment at two specific levels. Compressive stiffness was determined to be 717.8 N/mm at L2-3 and 949.0 N/mm at L5-6. Torsional stiffness was found to be 1.04 Nm/deg at L2-3 and 1.72 Nm/deg at L5-6. These data were then compared to human lumbar spine disc and motion segment properties that have been reported in the literature. After normalizing for size differences, the canine lumbar disc showed a similar axial modulus (14.03 MPa for L2-3 and 16.30 MPa for L5-6) and a significantly higher torsional modulus (30.80 MPa for L2-3 and 26.17 MPa for L5-6) when compared to human values. The relative contributions of ligaments, posterior elements, and intervertebral disc to overall stability of the motion segment was found to be similar in canines and humans. As has been shown in human spine research, the posterior elements including the facet joints were found to be significant structures in providing torsional rigidity of the canine spine.
开展了一项研究，以测量犬腰椎间盘及两个特定节段的运动节段的力学性能。确定L2 - 3节段的压缩刚度为717.8 N/mm，L5 - 6节段为949.0 N/mm。发现L2 - 3节段的扭转刚度为1.04 Nm/deg，L5 - 6节段为1.72 Nm/deg。然后将这些数据与文献中报道的人类腰椎间盘及运动节段的性能进行比较。在对尺寸差异进行归一化后，与人类数值相比，犬腰椎间盘显示出相似的轴向模量（L2 - 3节段为14.03 MPa，L5 - 6节段为16.30 MPa）和显著更高的扭转模量（L2 - 3节段为30.80 MPa，L5 - 6节段为26.17 MPa）。发现韧带、后部结构和椎间盘对运动节段整体稳定性的相对贡献在犬类和人类中相似。正如在人类脊柱研究中所表明的，包括小关节在内的后部结构被发现是提供犬脊柱扭转刚度的重要结构。
