Finite element analysis of acetabular transverse fracture reconstruction treated with different internal fixation methods

This article established the pelvis models with aeolotropic material property, and made modeling and mechanical analysis of the acetabular transverse fracture models treated with different internal fixation methods. The mechanical indexes we interested in are as follows, the maximal displacement, the maximum equivalent stress and the maximum stress around the fracture line. Through the compare of these indexes, we found the biomechanical properties differences of the two groups of fixation methods. The first group is including the posterior column long plate (NPL) and the posterior column short plate (NPS) fixations. The second group is composed of the following three double-column fixation methods, the double-column lag screws (SSG), the anterior column lag screw and posterior plate (SPG) fixation and the double-column plates (PPG) methods. All these analyses are during the double-leg stand position. The conclusions are as follows: NPL is much better than NPS. SSG is better than SPG, while SPG is better than PPG.