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Computational and Mathematical Methods in Medicine
Volume 2015, Article ID 790575, 11 pages
http://dx.doi.org/10.1155/2015/790575
Research Article

The Influence of Pelvic Ramus Fracture on the Stability of Fixed Pelvic Complex Fracture

1Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, 79 Yingze Road, Taiyuan 030024, China
2Mechanics College, Taiyuan University of Technology, Taiyuan 030024, China
3Department of Orthopedics, Wuhan General Hospital of Guangzhou Command, 627 Wuluo Road, Wuhan 430070, China

Received 15 February 2015; Revised 30 March 2015; Accepted 5 April 2015

Academic Editor: Feng Zhu

Copyright © 2015 Jianyin Lei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study aims to evaluate the biomechanical mechanism of pelvic ring injury for the stability of pelvis using the finite element (FE) method. Complex pelvic fracture (i.e., anterior column with posterior hemitransverse lesion) combined with pelvic ramus fracture was used to evaluate the biomechanics stability of the pelvis. Three FE fracture models (i.e., Dynamic Anterior Plate-Screw System for Quadrilateral Area (DAPSQ) for complex pelvic fracture with intact pubic ramus, DAPSQ for complex pelvic fracture with pubic ramus fracture, and DAPSQ for complex pelvic fracture with fixed pubic ramus fracture) were established to explore the biomechanics stability of the pelvis. The pubic ramus fracture leads to an unsymmetrical situation and an unstable situation of the pelvis. The fixed pubic ramus fracture did well in reducing the stress levels of the pelvic bone and fixation system, as well as displacement difference in the pubic symphysis, and it could change the unstable situation back to a certain extent. The pelvic ring integrity was the prerequisite of the pelvic stability and should be in a stable condition when the complex fracture is treated.