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Biomechanical implications of lumbar spinal ligament transection

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  • Gregory A. Von Forell
  • Anton E. Bowden

Abstract

Many lumbar spine surgeries either intentionally or inadvertently damage or transect spinal ligaments. The purpose of this work was to quantify the previously unknown biomechanical consequences of isolated spinal ligament transection on the remaining spinal ligaments (stress transfer), vertebrae (bone remodelling stimulus) and intervertebral discs (disc pressure) of the lumbar spine. A finite element model of the full lumbar spine was developed and validated against experimental data and tested in the primary modes of spinal motion in the intact condition. Once a ligament was removed, stress increased in the remaining spinal ligaments and changes occurred in vertebral strain energy, but disc pressure remained similar. All major biomechanical changes occurred at the same spinal level as the transected ligament, with minor changes at adjacent levels. This work demonstrates that iatrogenic damage to spinal ligaments disturbs the load sharing within the spinal ligament network and may induce significant clinically relevant changes in the spinal motion segment.

Suggested Citation

  • Gregory A. Von Forell & Anton E. Bowden, 2014. "Biomechanical implications of lumbar spinal ligament transection," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 17(15), pages 1685-1695, November.
    • Handle: RePEc:taf:gcmbxx:v:17:y:2014:i:15:p:1685-1695
    DOI: 10.1080/10255842.2013.763936
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    References listed on IDEAS

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    1. Danè Dabirrahmani & Stephan Becker & Michael Hogg & Richard Appleyard & Gamal Baroud & Mark Gillies, 2012. "Mechanical variables affecting balloon kyphoplasty outcome – a finite element study," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 15(3), pages 211-220.
    2. Ugur Ayturk & Christian Puttlitz, 2011. "Parametric convergence sensitivity and validation of a finite element model of the human lumbar spine," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 14(08), pages 695-705.
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