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Finite element analysis of Stryker Xia pedicle screw in artificial bone samples with and without supplemental cement augmentation

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  • Ferris M. Pfeiffer
  • Theodore J. Choma
  • Rebecca Kueny

Abstract

A validated, using in vitro biomechanical testing, finite element model was used to evaluate the affects of (1) cement augmentation and (2) an intact posterior cortex in osteoporotic bone. The presence of augmentation and/or a posterior cortical cortex increased the stabilization of the pedicle screw 2–5 fold. Placement of cement influenced failure load and toggle; with distal placement having the largest increase in failure load and decrease in cephalad–caudad toggle. The presence of posterior cortex caused a decrease in the amount of toggle, a proximal shift of the center of rotation and an increase in the maximum failure force.

Suggested Citation

  • Ferris M. Pfeiffer & Theodore J. Choma & Rebecca Kueny, 2015. "Finite element analysis of Stryker Xia pedicle screw in artificial bone samples with and without supplemental cement augmentation," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 18(13), pages 1459-1467, October.
    • Handle: RePEc:taf:gcmbxx:v:18:y:2015:i:13:p:1459-1467
    DOI: 10.1080/10255842.2014.916699
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