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Mechanical variables affecting balloon kyphoplasty outcome – a finite element study

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Listed:
  • Danè Dabirrahmani
  • Stephan Becker
  • Michael Hogg
  • Richard Appleyard
  • Gamal Baroud
  • Mark Gillies

Abstract

It is still unclear how a vertebral fracture should be stabilised and strengthened without endangering the remaining intact bone of the augmented vertebra or the adjacent vertebrae. Numerical modelling may provide insight. To date, however, few finite element (FE) spine models have been developed which are both multi-segmental and capture a more complete anatomy of the vertebrae.A 3-D, two-functional unit, CT-based, lumbar spine, FE model was developed and used to predict load transfer and likelihood of fracture following balloon kyphoplasty. The fractured anterior wall and injected cement were modelled in a two-functional spinal unit model with osteoporotic bone properties. Parameters investigated included: cement stiffness, cement volume and height restoration. Models were assessed based on stresses and a user-defined fracture-predicting field.Augmentation altered the stress distribution; shielding was dependent on positioning of the cement; and fracture algorithm found incomplete height restoration to increase the likelihood of fracture, particularly in adjacent vertebrae.

Suggested Citation

  • 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.
    • Handle: RePEc:taf:gcmbxx:v:15:y:2012:i:3:p:211-220
    DOI: 10.1080/10255842.2010.522183
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    Cited by:

    1. 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.

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