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

Cheng Chan Lo, Kai Jow Tsai, Zheng Cheng Zhong, Shih Hao Chen, Ching-Hua Hung*

*Corresponding author for this work

Research output: Contribution to journalArticle

16 Scopus citations

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.

Original languageEnglish
Pages (from-to)947-956
Number of pages10
JournalComputer Methods in Biomechanics and Biomedical Engineering
Volume14
Issue number11
DOIs
StatePublished - 1 Dec 2011

Keywords

  • Anterior lumbar interbody fusion
  • Finite element analysis; posterior instrumentations
  • Interspinous spacer
  • Pedicle screw fixation
  • Transforaminal lumbar interbody fusion

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