@inproceedings{d1f2860a6759474d8e7a119430d8f91e,
title = "Biomechanical differences of coflex-f and pedicle screw fixation in stabilization of TLIF or ALIF condition - A finite element study",
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 stabilization similar to pedicle screw fixation. Therefore, this study compares the biomechanical behavior of the Coflex-F device and pedicle screw fixation with transforaminal lumbar interbody fusion (TLIF) or anterior lumbar interbody fusion (ALIF) surgeries. This study used a validated three-dimensional finite element model of the L1-L5 lumbar intact spine. To simulate TLIF surgery, left lateral total facetectomy and partial discectomy were performed at the L3/L4 segment of this intact model. An AVS-TL moon cage (Stryker Orthopaedics) was implanted in the L3/L4 segment and using a Coflex-F device or pedicle screw fixation. To simulate ALIF surgery, partial discectomy and total nuclectomy were performed at the L3/L4 segment of this intact model. A SynCage-Open cage (Synthes Spine, Inc.) was implanted into the L3/L4 segment and combined with a Coflex-F device or pedicle screw fixation. A 400 N follower load and a 10 Nm moment were applied to the intact model to mimic four physiological motions. All four implanted models were subjected to 400 N follower load and specific moments in accordance with the hybrid test method. The results show that the Coflex-F device combined with ALIF surgery can provide stability similar to that of pedicle screw fixation combined with TLIF or ALIF surgery. Also, both the posterior instrumentations (Coflex-F and pedicle screw fixation) combined with TLIF surgery had lower stability than combined with ALIF surgery.",
keywords = "Anterior lumbar interbody fusion (ALIF), Finite element, Interspinous spacer, Pedicle screw fixation, Transforaminal lumbar interbody fusion (TLIF)",
author = "Lo, {C. C.} and Tsai, {K. J.} and Zhong, {Z. C.} and Ching-Hua Hung",
year = "2010",
month = oct,
day = "22",
doi = "10.1007/978-3-642-14515-5_144",
language = "English",
isbn = "9783540790389",
series = "IFMBE Proceedings",
pages = "565--568",
booktitle = "6th World Congress of Biomechanics, WCB 2010 - In Conjunction with 14th International Conference on Biomedical Engineering, ICBME and 5th Asia Pacific Conference on Biomechanics, APBiomech",
note = "null ; Conference date: 01-08-2010 Through 06-08-2010",
}