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Regional annulus fibre orientations used as a tool for the calibration of lumbar intervertebral disc finite element models

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  • Andrea Malandrino
  • Jérôme Noailly
  • Damien Lacroix

Abstract

The collagen network of the annulus fibrosus largely controls the functional biomechanics of the lumbar intervertebral discs (IVDs). Quantitative anatomical examinations have shown bundle orientation patterns, possibly coming from regional adaptations of the annulus mechanics. This study aimed to show that the regional differences in annulus mechanical behaviour could be reproduced by considering only fibre orientation changes. Using the finite element method, a lumbar annulus was modelled as a poro-hyperelastic material in which fibres were represented by a direction-dependent strain energy density term. Fibre orientations were calibrated to reproduce the annulus tensile behaviours measured for four different regions: posterior outer, anterior outer, posterior inner and anterior inner. The back-calculated fibre angles and regional patterns as well as the global disc behaviour were comparable with anatomical descriptions reported in the literature. It was concluded that annulus fibre variations might be an effective tool to calibrate lumbar spine IVD and segment models.

Suggested Citation

  • Andrea Malandrino & Jérôme Noailly & Damien Lacroix, 2013. "Regional annulus fibre orientations used as a tool for the calibration of lumbar intervertebral disc finite element models," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 16(9), pages 923-928, September.
    • Handle: RePEc:taf:gcmbxx:v:16:y:2013:i:9:p:923-928
    DOI: 10.1080/10255842.2011.644539
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    Cited by:

    1. Masni-Azian & Masao Tanaka, 2017. "Statistical factorial analysis approach for parameter calibration on material nonlinearity of intervertebral disc finite element model," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(10), pages 1066-1076, July.

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