Measurement of a spinal motion segment stiffness matrix
Measurement of a spinal motion segment stiffness matrix
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DOI：
10.1016/s0021-9290(01)00221-4
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发表时间：
2002-04-01
影响因子：
2.4
通讯作者：
Laible, JP
中科院分区：
文献类型：
--
作者：
Stokes, IA;Gardner-Morse, M;Laible, JP
脊柱运动节段的六自由度弹性行为可以通过刚度矩阵来近似。描述了一种方法，通过测量与六个正交平移和旋转中的每一个相关的力和力矩，用保持在轴向预载的生理条件下和等渗流体浴中的运动段直接测量该刚度矩阵。刚度矩阵是通过假设对称矩阵的线性最小二乘法从负载位移测量中获得的。猪腰椎运动节段在等渗浴中的结果，无论是否有 500 N 轴向预载，都显示出轴向预载具有很大的硬化效应。 (C) 2002 Elsevier Science Ltd. 保留所有权利。
The six-degrees-of-freedom elastic behavior of spinal motion segments can be approximated by a stiffness matrix. A method is described to measure this stiffness matrix directly with the motion segment held under physiological conditions of axial preload and in an isotonic fluid bath by measuring the forces and moments associated with each of the six orthogonal translations and rotations. The stiffness matrix was obtained from the load-displacement measurements by linear least squares assuming a symmetric matrix. Results from a pig lumbar spinal motion segment in an isotonic bath, with and without a 500 N axial preload, showed a large stiffening effect with axial preload. (C) 2002 Elsevier Science Ltd. All rights reserved.