Paper Title:
Biomechanical Comparison of Different Pedicle Screw Fixations for Thoracolumbar Burst Fractures Using Finite Element Method
  Abstract

This study was designed to compare the biomechanical effects of three posterior fixations for thoracolumbar burst fractures using the finite element (FE) method. Five T11-L1 FE models, including the intact, the fractured at T12, the monosegment fixated at the level of the fracture, the short-segment fixated with four pedicle screws and the short-segment fixated with five pedicle screws, were created. And four loading conditions (flexion, extension, lateral bending and torsion) were imposed on these models and deformations in these models under different loading conditions were calculated by finite element method. The biomechanical effects of the three different pedicle screw fixations for thoracolumbar burst fractures were compared and analyzed. The results showed that the displacement level in monosegment fixation model was close to that in the intact one. The extension motion was more limited in short-segment fixation models than that in monosegment fixation model. Under the lateral bending condition, the level of the displacements in these models were similar and the peak rotation angles in the three fixation models were close to that in the intact one. The displacements in fractured T12 were increased in monosegment fixation model under all loading conditions. These indicated that the monosegment fixation couldn’t provide desirable stability for the fractured T11-L1 and the short-segment fixation with five pedicle screws was the best selection because of ideal stability and movability.

  Info
Periodical
Chapter
Chapter 5: Biomechanics and Environmental Mechanics
Edited by
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
Pages
699-702
DOI
10.4028/www.scientific.net/AMM.117-119.699
Citation
D. M. Wang, D. F. Shi, X. L. Li, J. Dong, C. H. Wang, S. G. Chen, "Biomechanical Comparison of Different Pedicle Screw Fixations for Thoracolumbar Burst Fractures Using Finite Element Method", Applied Mechanics and Materials, Vols. 117-119, pp. 699-702, 2012
Online since
October 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: H.Y. Yu, Zhen Bing Cai, Zhong Rong Zhou, Min Hao Zhu
Abstract:Under simulated human physiological solution, the fretting behaviors of flat cortical bone specimen from fresh human femur in the transverse...
607
Authors: Yin Fang Jiang, Lei Fang, Zhi Fei Li, Zhen Zhou Tang
Abstract:As a new lightweight material and new technique,Tailor Rolled Blanks has a good prospect in energy-saving environmental protection and the...
488
Authors: Jian Min Chen, Meng Zhang, Jia Deng
Modeling, Analysis and Simulation of Manufacturing Processes
Abstract:The paper firstly numerically simulates the coupled model of triangle fastening screw threads in the application of ANSYS software. Calculate...
657
Authors: Hui Hui Zhao, Wen Fang Zhang
Chapter 3: Civil Engineering
Abstract:The application of ABAQUS finite element software non-linear finite element analysis of brick masonry walls with structural column. Build...
791