Authors:
Jisu Choi
1
;
Dong Ah Shin
2
and
Sohee Kim
1
Affiliations:
1
Gwangju Institute of Science and Technology, Korea, Republic of
;
2
Yonsei University College of Medicine, Korea, Republic of
Keyword(s):
Lumbar Artificial Disc, Total Disc Replacement, Finite Element Method (FEM).
Related
Ontology
Subjects/Areas/Topics:
Agents
;
Artificial Intelligence
;
Bioinformatics
;
Biomedical Engineering
;
Enterprise Information Systems
;
Information Systems Analysis and Specification
;
Methodologies and Technologies
;
Model Design and Evaluation
;
Operational Research
;
Simulation
;
Structure Prediction
Abstract:
The purpose of this study was to analyze the biomechanical effects of three different types of ball-and-socket
geometry of a lumbar artificial disc using finite element method. A three dimensional linear finite
element (FE) model was developed, and the lumbar artificial disc was inserted at L3-L4 level. The height of
implant was fixed and location of implant was also center-fixed. Three different curvatures of ball-and-socket
geometry were modeled (radius of curvature: 50.5mm for C1, 26mm for C2, 18.17mm for C3). The
biomechanical effects including range of motion (ROM), stress of intervertebral disc, facet contact force
and stress on implant were compared among different geometries. As the radius of curvature decreased, the
result shows that ROM increased at the surgical level and the stress on implant decreased. The change in
stress within intervertebral disc was not significant. The facet contact force at surgical level was maximum
with C2 while C1 and C3 had similar face
t contact force. We confirmed that the geometry of artificial disc
can cause remarkable biomechanical changes at surgical level.
(More)