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A Robotic Testing Facility for the Measurement of the Mechanics of Spinal Joints

de Visser, Hans, Rowe, Catherine, & Pearcy, Mark J. (2007) A Robotic Testing Facility for the Measurement of the Mechanics of Spinal Joints. Proceedings of the Institution of Mechanical Engineers, Part H, Journal of Engineering in Medicine, 221(3), pp. 221-227.

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Abstract

A robotic testing facility for the measurement of joint mechanics was used to determine the significance of tears in the intervertebral disc on the mechanics of the spinal joint. Ten lumbar joints of sheep were dynamically loaded and manipulated. Comparisons were made between the behaviour of the intervertebral disc in flexion/extension at two test speeds. The influence of the posterior elements and of rim lesions was assessed by testing the joint immediately before and after removal of the posterior elements and after the creation of a 4x10 mm rim lesion in the disc. Stiffness of the spinal joint dropped significantly upon removal of the posterior elements, from 0.81 to 0.23 Nm/° for flexion and from 0.65 to 0.40 Nm/° for extension. Maximum moments dropped 37% for flexion and 63% for extension. The rim lesion caused a further significant stiffness reduction to 0.21 and 0.31 Nm/° respectively. Maximum moments reduced a further 12% and 16% respectively. A higher test speed (2 instead of 0.5 °/sec) usually did not change these results significantly. The novel six degrees-of-freedom robotic testing facility used in this study was demonstrated to be an effective system for studying the mechanics of complex biological joints.

Impact and interest:

9 citations in Scopus
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8 citations in Web of Science®

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324 since deposited on 20 Mar 2007
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ID Code: 6652
Item Type: Journal Article
Keywords: Lesions, Intervertebral Disc, Robotic Testing Facility, Dynamic Testing
DOI: 10.1243/09544119JEIM175
ISSN: 0954-4119
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomechanical Engineering (090302)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2007 Professional Engineering Publishing
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 20 Mar 2007
Last Modified: 29 Feb 2012 23:36

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