Establishment and preliminary analysis of biomechanical behavior of lumbar dynamic stability system according to the three-dimensional finite element method
CHEN Wei-jian
DUAN Yang
LIN Zhou-sheng
LI Gui-tao
SUN Hong-tao
LIU Yan-fang
Abstract：Objective To construct the dynamic lumbar pedicle scree system based on the three -dimensional fi-nite element model , thus to preliminarily analyze the stress distribution under different loads and the range of motion (ROM).Methods CT scan of the L3 ~S2 section of a healthy adult male volunteer was performed , while Mimics 10.01 and Abaqus 6.10 software were introduced to establish normal segmental model .Bioflex pedicle screw and elastic rod were used to establish dynamic stability system model .Under 150 N preload, and 10 Nm torque to three principal planes , the stress distribution in flexion , extension , lateral bending and torsion were simulated , while the ROMs of extension and tor-sion were also analyzed .Results The establishment of a lumbar L 3 ~S2 segmental finite element model and the dynamic stability system conformed to biomechanical model .Stress mainly concentrated on the elastic rods , when preliminarily ana-lyzing dynamic stabilization system of the lumbar spine .Under the extension and rotation loads , the ROMs of implanted segments were significantly reduced .Conclusion Based on the three-dimensional finite element method , the established Bioflex lumbar dynamic model can excellently simulate the mechanical activity of the lumbar spine dynamic system ; also simulate the stress of the lumbar spine and all kinds of activities , proved to valuable .
Keywords：lumbardynamic stability systempedicle screwfinite element analysis
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1497-1499,1500 )