TY - JOUR
T1 - Stress analysis of the disc adjacent to interbody fusion in lumbar spine
AU - Chen, Chen Sheng
AU - Cheng, Cheng Kung
AU - Liu, Chien Lin
AU - Lo, Wai Hee
PY - 2001
Y1 - 2001
N2 - After anterior interbody fusion in the lumbar spine, the accelerated degeneration of the disc adjacent to the fusion levels was clinically observed. To understand the stress distribution of the adjacent disc, this study created a finite element model of the lumbar spine from L1-L5 vertebral body. The fusion model modified from the intact model was used to simulate the anterior interbody fusion. Various loading conditions, which included flexion, extension, lateral bending, and torsion, were applied to the finite element model to study the corresponding stress distribution. From the finite element model calculation, at a lower fusion site or more fusion levels, the stress of the disc adjacent to interbody fusion increased more than upper fusion site or single fusion level under flexion, torsion and lateral bending. Larger stress increase was estimated at the upper disc adjacent to interbody fusion than the lower disc adjacent to interbody fusion. In stress distribution, the upper disc adjacent to interbody fusion had a little alteration under torsion.
AB - After anterior interbody fusion in the lumbar spine, the accelerated degeneration of the disc adjacent to the fusion levels was clinically observed. To understand the stress distribution of the adjacent disc, this study created a finite element model of the lumbar spine from L1-L5 vertebral body. The fusion model modified from the intact model was used to simulate the anterior interbody fusion. Various loading conditions, which included flexion, extension, lateral bending, and torsion, were applied to the finite element model to study the corresponding stress distribution. From the finite element model calculation, at a lower fusion site or more fusion levels, the stress of the disc adjacent to interbody fusion increased more than upper fusion site or single fusion level under flexion, torsion and lateral bending. Larger stress increase was estimated at the upper disc adjacent to interbody fusion than the lower disc adjacent to interbody fusion. In stress distribution, the upper disc adjacent to interbody fusion had a little alteration under torsion.
KW - Anterior interbody fusion
KW - Disc degeneration
KW - Finite element model
UR - http://www.scopus.com/inward/record.url?scp=0034802078&partnerID=8YFLogxK
U2 - 10.1016/s1350-4533(01)00076-5
DO - 10.1016/s1350-4533(01)00076-5
M3 - Article
C2 - 11574255
AN - SCOPUS:0034802078
SN - 1350-4533
VL - 23
SP - 485
EP - 493
JO - Medical Engineering and Physics
JF - Medical Engineering and Physics
IS - 7
ER -