Biomechanical study of lumbar spine with artificial disc replacement using three-dimensional finite element method
نویسندگان
چکیده
Biomechanical analyses on lumbar spine under compressive load and flexion torque were performed using a nonlinear three-dimensional finite element method to evaluate the stability of artificial disc replacement. We prepared a validated intact lumbar L4-L5 motion segment and artificial disc inserted motion segment by replacing intact disc with the artificial disc which is being developed. Effects of fiber winding pattern in the artificial disc were also examined. Elasticity of the artificial disc inserted motion segment model was higher than that of the intact motion segment model. Stress concentration caused by artificial disc replacement was found in contact region between artificial disc and vertebral body. Average stress of cortical bone increased in artificial disc inserted model. The winding pattern in which fiber is wound skipping 3 slots proved more flexible in axial compression than the pattern skipping 2 slots.
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