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Biomechanical differences of Coflex-F and pedicle screw fixation combined with TLIF or ALIF – a finite element study

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  • Cheng-Chan Lo
  • Kai-Jow Tsai
  • Zheng-Cheng Zhong
  • Shih-Hao Chen
  • Chinghua Hung

Abstract

Lumbar interbody fusion is a common procedure for treating lower back pain related to degenerative disc diseases. The Coflex-F is a recently developed interspinous spacer, the makers of which claim that it can provide stabilisation similar to pedicle screw fixation. Therefore, this study compares the biomechanical behaviour of the Coflex-F device and pedicle screw fixation with transforaminal lumbar interbody fusion (TLIF) or anterior lumbar interbody fusion (ALIF) surgeries by using finite element analysis. The results show that the Coflex-F device combined with ALIF surgery can provide stability similar to the pedicle screw fixation combined with TLIF or ALIF surgery. Also, the posterior instrumentations (Coflex-F and pedicle screw fixation) combined with TLIF surgery had lower stability than when combined with ALIF surgery.

Suggested Citation

  • Cheng-Chan Lo & Kai-Jow Tsai & Zheng-Cheng Zhong & Shih-Hao Chen & Chinghua Hung, 2011. "Biomechanical differences of Coflex-F and pedicle screw fixation combined with TLIF or ALIF – a finite element study," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 14(11), pages 947-956.
    • Handle: RePEc:taf:gcmbxx:v:14:y:2011:i:11:p:947-956
    DOI: 10.1080/10255842.2010.501762
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