Kurowski P, Kubo A
Spine (Phila Pa 1976). 1986 Sep;11(7):726-31. doi: 10.1097/00007632-198609000-00012.
Degeneration of lumbar intervertebral discs is typical for the aging process and contributes to common low-back problems. It is likely to influence vertebrae by changing the mechanical interaction within each motion segment. This study focuses on the influence of disc degeneration on the mechanism of load transmission through the lumbar vertebral body. Effective stresses, ways of load transmission and failure modes of vertebral body were examined in cases of healthy and degenerated discs. The stress analysis was performed using the Finite Element Method. For healthy discs, the highest effective stresses were found in the center of bony end-plates. For degenerated discs, they were found in the lateral aspects of the end-plates, in the cortical wall, and also in the vertebral body rims. However, regardless of the disc condition, the highest effective stresses do not occupy the whole thickness of the endplate and/or the cortical wall, but are concentrated near the spongy core. Ways of load transmission through the lumbar vertebral body and modes of eventual damage to it are also strongly influenced by the disc condition.
腰椎间盘退变是衰老过程的典型表现，也是常见下背部问题的成因之一。它可能通过改变每个运动节段内的力学相互作用来影响椎体。本研究聚焦于椎间盘退变对腰椎椎体负荷传递机制的影响。在健康椎间盘和退变椎间盘的情况下，研究了椎体的有效应力、负荷传递方式和失效模式。采用有限元法进行应力分析。对于健康椎间盘，在骨终板中心发现最高有效应力。对于退变椎间盘，最高有效应力出现在终板的外侧、皮质壁以及椎体边缘。然而，无论椎间盘状况如何，最高有效应力并不占据终板和/或皮质壁的整个厚度，而是集中在松质骨核心附近。腰椎椎体的负荷传递方式以及最终损伤模式也受到椎间盘状况的强烈影响。
