Finite element model of a lumbar spinal motion segment to predict circadian variation in stature

2003 ◽  
Vol 81 (8-11) ◽  
pp. 835-842 ◽  
Author(s):  
R.N. Natarajan ◽  
J.R. Williams ◽  
G.B.J. Andersson
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Circadian Variation ◽  
Element Model ◽  
Spinal Motion ◽  
Motion Segment ◽  
Lumbar Spinal ◽  
Spinal Motion Segment

A finite element model of the L4–L5 spinal motion segment: biomechanical compatibility of an interspinous device

2005 ◽  
Vol 8 (1) ◽  
pp. 7-16 ◽  
Author(s):  
Pasquale Vena ◽  
Giampaolo Franzoso ◽  
Dario Gastaldi § ◽  
Roberto Contro ¶ ◽  
Villiam Dallolio
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Spinal Motion ◽  
Motion Segment ◽  
Interspinous Device ◽  
Biomechanical Compatibility ◽  
Spinal Motion Segment

Stress analysis of a canine spinal motion segment using the finite element technique

1994 ◽  
Vol 27 (10) ◽  
pp. 1259-1269 ◽  
Author(s):  
Tae-Hong Lim ◽  
Vijay K. Goel ◽  
James N. Weinstein ◽  
Weizeng Kong
Keyword(s):  
Finite Element ◽  
Stress Analysis ◽  
Spinal Motion ◽  
Finite Element Technique ◽  
Motion Segment ◽  
Element Technique ◽  
Spinal Motion Segment

Establishment of FE model of lumbar spinal motion segment in postmenopausal women with vQCT technique

Bone ◽  
2008 ◽  
Vol 43 ◽  
pp. S121-S122
Author(s):  
Shengyong Wu ◽  
Yuezeng Cai ◽  
Penglin Wang ◽  
Jing Lan ◽  
Liying Wang ◽  
...  
Keyword(s):  
Postmenopausal Women ◽  
Fe Model ◽  
Spinal Motion ◽  
Motion Segment ◽  
Lumbar Spinal ◽  
Spinal Motion Segment

Development and validation of a viscoelastic finite element model of an L2/L3 motion segment

1997 ◽  
Vol 28 (1) ◽  
pp. 81-93 ◽  
Author(s):  
J.L. Wang ◽  
M. Parnianpour ◽  
A. Shirazi-Adl ◽  
A.E. Engin ◽  
S. Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Motion Segment ◽  
Development And Validation

scholarly journals A non-linear finite element model of human L4-L5 lumbar spinal segment with three-dimensional solid element ligaments

2011 ◽  
Vol 1 (6) ◽  
pp. 064001 ◽  
Author(s):  
Zhitao Xiao ◽  
Liya Wang ◽  
He Gong ◽  
Dong Zhu ◽  
Xizheng Zhang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Three Dimensional ◽  
Element Model ◽  
Spinal Segment ◽  
Linear Finite Element ◽  
Solid Element ◽  
Non Linear ◽  
Lumbar Spinal

Quantifying Motion Across a Solid Lumbar Interbody Fusion Using a Finite Element Model

2003 ◽  
Author(s):  
Ashutosh D. Khandha ◽  
Sasidhar S. Vadapalli ◽  
Scott A. Holekamp ◽  
Vijay K. Goel ◽  
Christopher M. Bono ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Scientific Methods ◽  
Flexion Extension ◽  
Residual Motion ◽  
Cortical Shell ◽  
Solid Fusion ◽  
Spinal Ligaments ◽  
Lumbar Spinal

Clinical assessment of pseudarthrosis or solid fusion is based on the residual motion across the “fused” segment (Kowalski et al, 2001). Dynamic flexion/extension (F/E) radiographs are commonly used to determine residual motion. Despite widespread use, it is unclear what the appropriate “cut-off” criteria to declare a fusion solid should be, with recommendations ranging from 0 to 5°. These values have not been derived by scientific methods. The present study was initiated to predict the angular sagittal motion across simulated lumbar interbody fusions (IF) using a Finite Element Model (FEM) of the ligamentous lumbar spinal segment. Anterior and posterior lumbar interbody fusions were simulated at the L3–L4 level as per the clinical procedure. Varying degrees of fusion were taken into account and the fusion mass was the simulated as a cancellous core with a cortical shell. The results indicated that 0.5° to 5.14° of angular motion can occur depending on fusion location and degree of completeness. While continuous bone might be noted at surgical exploration, this amount of motion may enable persistent loading of remaining structures, such as the annulus or spinal ligaments. In our view, this may prompt a redefinition of clinically “solid fusion”.

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