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Sub-Axial Cervical Spine Instability Following Unilateral Facet Injury: A Biomechanical Analysis

[+] Author Affiliations
Stewart D. McLachlin, Cynthia E. Dunning

The University of Western Ontario, London, ON, Canada

Parham Rasoulinejad, Kevin R. Gurr, Stewart I. Bailey, Chris S. Bailey

London Health Sciences Centre, London, ON, Canada

Paper No. SBC2010-19377, pp. 489-490; 2 pages
  • ASME 2010 Summer Bioengineering Conference
  • ASME 2010 Summer Bioengineering Conference, Parts A and B
  • Naples, Florida, USA, June 16–19, 2010
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-4403-8
  • Copyright © 2010 by ASME


Unilateral facet injuries are relatively common in the sub-axial cervical spine. Facet fractures, capsular disruptions, and posterior ligament tears can all contribute to this type of injury resulting in a range of instability spanning undisplaced fractures to complete unilateral dislocations [1]. For a particular injury pattern, considerable variability exists in the choice of treatment, and the modality selected is frequently based on surgeon preference [2]. This is due, in part, to a lack of biomechanical studies focused on increasing the understanding of changes in spinal stability that occur following cervical spine injury.

Copyright © 2010 by ASME



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