Validation of a clinical finite element model of the human lumbosacral spine. Med Biol Eng Comput 2006 Aug;44(8):633-41
Date
08/29/2006Pubmed ID
16937205DOI
10.1007/s11517-006-0066-9Scopus ID
2-s2.0-33746961589 (requires institutional sign-in at Scopus site) 82 CitationsAbstract
Very few finite element models on the lumbosacral spine have been reported because of its unique biomechanical characteristics. In addition, most of these lumbosacral spine models have been only validated with rotation at single moment values, ignoring the inherent nonlinear nature of the moment-rotation response of the spine. Because a majority of lumbar spine surgeries are performed between L4 and S1 levels, and the confidence in the stress analysis output depends on the model validation, the objective of the present study was to develop a unique finite element model of the lumbosacral junction. The clinically applicable model was validated throughout the entire nonlinear range. It was developed using computed tomography scans, subjected to flexion and extension, and left and right lateral bending loads, and quantitatively validated with cumulative variance analyses. Validation results for each loading mode and for each motion segment (L4-L5, L5-S1) and bisegment (L4-S1) are presented in the paper.
Author List
Guan Y, Yoganandan N, Zhang J, Pintar FA, Cusick JF, Wolfla CE, Maiman DJAuthors
Frank A. Pintar PhD Chair, Professor in the Biomedical Engineering department at Medical College of WisconsinChristopher E. Wolfla MD Professor in the Neurosurgery department at Medical College of Wisconsin
Narayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AdultBiomechanical Phenomena
Cadaver
Finite Element Analysis
Humans
Lumbar Vertebrae
Models, Biological
Movement
Rotation
Sacrum
Spine
Stress, Mechanical