Document Detail

A continuous pure moment loading apparatus for biomechanical testing of multi-segment spine specimens.
MedLine Citation:
PMID:  10807999     Owner:  NLM     Status:  MEDLINE    
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.
J T Lysack; J P Dickey; G A Dumas; D Yen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of biomechanics     Volume:  33     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-07-25     Completed Date:  2000-07-25     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  765-70     Citation Subset:  IM; S    
Department of Surgery, Division of Orthopaedics and Clinical Mechanics Group, Queen's University, Kingston, Ontario, Canada.
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MeSH Terms
Biophysics / instrumentation
Equipment Design
Infrared Rays
Joint Instability / physiopathology
Longitudinal Ligaments / physiology
Lumbar Vertebrae / physiology*
Optics and Photonics
Signal Processing, Computer-Assisted
Stress, Mechanical
Weight-Bearing / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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