EXPERIMENTAL-MEASUREMENT OF LIGAMENT FORCE, FACET FORCE, AND SEGMENT MOTION IN THE HUMAN LUMBAR SPINE
EXPERIMENTAL-MEASUREMENT OF LIGAMENT FORCE, FACET FORCE, AND SEGMENT MOTION IN THE HUMAN LUMBAR SPINE
复制标题
DOI：
10.1016/0021-9290(93)90006-z
复制
发表时间：
1993-04-01
影响因子：
2.4
通讯作者：
OGILVIE, JW
中科院分区：
文献类型：
--
作者：
SCHENDEL, MJ;WOOD, KB;OGILVIE, JW
在五个新鲜的人腰椎节段L1-L2中，通过实验测量小关节力、纵韧带负荷和椎体运动。使用骨表面上的应变计来量化关节面载荷。使用带扣传感器测量前后纵韧带负荷。运动节段的三维运动用仪器化的空间连杆测量。发现关节面在屈曲时不承受载荷，在伸展（10 Nm力矩和190 N轴向载荷下为205 N）、扭转（10 Nm力矩和150 N轴向载荷下为65 N）和侧弯（3 Nm力矩和160 N轴向载荷下为78 N）时承受大载荷。随着伸展力矩的增加，L1下关节突上的关节面接触部位向前移动到椎板附近的尖端撞击位置。撞击发生在4-6 Nm的伸展范围内。后纵韧带和前纵韧带主要分别在屈曲和伸展时加载。在侧弯和扭转中没有韧带载荷发生。在最大伸展力矩11.4 Nm时，1 cm的前纵韧带条可承受高达130 N的载荷。后纵韧带在最大屈曲力矩7.1 Nm时承受60 N载荷。在带扣传感器检测到的韧带中没有预载荷（> 4 N）。小关节和韧带在施加载荷后立即开始承载载荷，没有松弛区域。开发和使用的实验技术提供了一种良好的工具，用于获得同时的小关节载荷、韧带载荷和椎体运动，而不改变运动节段。
Facet forces, longitudinal ligament loads, and vertebral body motion were experimentally measured in five fresh human lumbar spine segments, L1-L2. Strain gages on the bone surface were used to quantify facet loads. Buckle transducers were used to measure anterior and posterior longitudinal ligament loads. The three-dimensional motion of the motion segment was measured with an instrumented spatial linkage. The facets were found to carry no load in flexion, large loads during extension (205 N at a 10 Nm moment and a 190 N axial load), torsion (65 N at a 10 Nm moment and a 150 N axial load), and lateral bending (78 N at a 3 Nm moment and a 160 N axial load). The facet contact site on the inferior articular process of L1 was found to move inferiorly to a position of tip impingement near the lamina as extension moments increased. Impingement occurred in the range of 4-6 Nm extension. The posterior and anterior longitudinal ligaments were predominantly loaded in flexion and extension, respectively. No ligament loads occurred in lateral bending and torsion. A 1 cm strip of the anterior longitudinal ligament carried loads up to 130 N at the largest extension moment of 11.4 Nm. The posterior longitudinal ligament had a 60 N load at the largest flexion moment of 7.1 Nm. There was no pre-load in the ligament detectable with the buckle transducers (> 4 N). The facets and ligaments began carrying load immediately with applied load, without a lax region, The experimental technique developed and used provides a good tool for obtaining simultaneous facet joint loads, ligament loads, and vertebral body motion without altering the motion segment.