Journal
MEDICAL ENGINEERING & PHYSICS
Volume 35, Issue 3, Pages 357-364Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.medengphy.2012.05.013
Keywords
Total disc replacement; Finite element model; Range of motion; Nucleus pressure; Facet joint force; Anterior longitudinal ligament force
Categories
Funding
- Globus Medical
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The current study aimed to compare the biomechanics of the L3-51 spine segment treated either by fusion or total disc replacement (TDR) using the TRIUMPH (R) Lumbar Disc (Globus Medical, Audubon, PA). A validated three-dimensional, nonlinear finite element model (FEM) of L3-S1 was altered at L4/15 by fusion and implantation of the TRIUMPH (R) Lumbar Disc. Under a hybrid testing protocol, the resultant range of motion (ROM), nucleus pressure at the adjacent levels, facet joint force, and anterior longitudinal ligament (ALL) force were analyzed. FEM predicted several changes in biomechanics when compared to the intact segment. The analyses suggest that posterolateral lumbar disc arthroplasty with the TRIUMPH (R) Lumbar Disc can preserve the mobility of the surgical level while not allowing excessive ROM and reducing segmental motion at the adjacent levels when compared to fusion. The current finite element model could be valuable for engineers and surgeons seeking to optimize TDR designs. (C) 2012 IPEM. Published by Elsevier Ltd. All rights reserved.
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