A continuous pure moment loading apparatus for biomechanical testing of multi-segment spine specimens

被引：54

作者：

Lysack, JT

Dickey, JP

Dumas, GA

Yen, D

机构：

[1] Queens Univ, Dept Surg, Kingston, ON, Canada

[2] Queens Univ, Div Orthopaed, Kingston, ON, Canada

[3] Queens Univ, Clin Mech Grp, Kingston, ON, Canada

[4] Univ Guelph, Dept Human Biol & Nutr Sci, Guelph, ON N1G 2W1, Canada

[5] Queens Univ, Dept Mech Engn, Kingston, ON K7L 3N6, Canada

来源：

JOURNAL OF BIOMECHANICS | 2000年 / 33卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

spine; flexibility testing; loading apparatus; pure moments; continuous loads;

D O I：

10.1016/S0021-9290(00)00021-X

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

An apparatus is described that enables the application of continuous pure moment loads to multi-segment spine specimens. This loading apparatus allows continuous cycling of the spine between specified flexion and extension (or right and left lateral bending) maximum load endpoints. Using a six-degree-of-freedom load cell and three-dimensional optoelectronic stereophotogrammetry, characteristic displacement versus load hysteresis curves can be generated and analyzed for different spinal constructs of interest. Unlike quasi-static loading, the use of continuous loading permits the analysis of the spine's behaviour within the neutral zone. This information is of particular clinical significance given that the instability of a spinal segment is related to its flexibility within the neutral zone. Representative curves for the porcine lumbar spine in flexion-extension and lateral bending are presented to illustrate the capabilities of this system. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：765 / 770

页数：6

共 21 条

[1] MECHANICAL TESTING OF THE SPINE - AN APPRAISAL OF METHODOLOGY, RESULTS, AND CONCLUSIONS [J].