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Load Sharing, Bone Screw Interaction and Stress in CFR-PEEK Lumbar Spine Constructs

    • Reference:
    • Guan et al., Proceedings of the ASME 2009 Summer Bioengineering Conference, SBC2009-206654.
    • Keywords:
    • CFR PEEK, PEEK, Rod and screw construct
    • Permissions:
    • The PDF copy of the article is declared a work of the U.S. Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.

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Abstract

The aim of this study is to develop a refined block fixation FE model to investigate the load sharing, bone screw interaction, and stresses and strains in a CFR PEEK lumbar spine construct. The results of this FE study indicate that for the Ti and CFR-PEEK screw, the disc expierences the least strain with the Ti rod and the greatest strain with the PEEK rod. Due to its enhanced mechanical strength, the CFR-PEEK rod sustained comparable loads compared with the Ti rod and experienced less deformation than the PEEK rod.

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