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The biomechanical effects of Ti versus PEEK used in the PLIF surgery on lumbar spine: a finite element analysis

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  • Hongwei Wang
  • Yi Wan
  • Xinyu Liu
  • Bing Ren
  • Yan Xia
  • Zhanqiang Liu

Abstract

Titanium (Ti) and polyetheretherketone (PEEK) are commonly used in posterior lumbar interbody fusion (PLIF). The study investigated biomechanical effects of Ti versus PEEK used as materials of cage and rods on the lumbar spine. Four different configurations of PLIF were constituted. Stiff Ti rods provided satisfactory initial stability but increased the stress on rods significantly under simulated physiological load conditions. Ti cage increased the stress on bone endplates significantly. Materials of cage and rods had insignificant effects on the nucleus pressure and facet joint force of non-instrumented segments. Further clinical studies and follow-up observations are essential for corroborating these findings.

Suggested Citation

  • Hongwei Wang & Yi Wan & Xinyu Liu & Bing Ren & Yan Xia & Zhanqiang Liu, 2021. "The biomechanical effects of Ti versus PEEK used in the PLIF surgery on lumbar spine: a finite element analysis," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 24(10), pages 1115-1124, September.
    • Handle: RePEc:taf:gcmbxx:v:24:y:2021:i:10:p:1115-1124
    DOI: 10.1080/10255842.2020.1869219
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