Three-dimensional finite element analysis with different internal fixation methods through the anterior approach  

作　　者：Xian-Jin Xie Sheng-Lu Cao Kai Tong Zi-Yi Zhong Gang Wang 

机构地区：[1]Department of Orthopaedic Surgery,Nanfang Hospital,Southern Medical University,Guangzhou 510515,Guangdong Province,China [2]Department of Orthopaedic Surgery,Zhongnan Hospital,Wuhan University,Wuhan 430000,Hubei Province,China

出　　处：《World Journal of Clinical Cases》2021年第8期1814-1826,共13页世界临床病例杂志

基　　金：National Natural Science Foundation of China,No.81272008.

摘　　要：BACKGROUND With the modernization of society and transportation in the last decades in China,the incidence of high-energy trauma increased sharply in China,including that of acetabular fractures.AIM To establish different finite element models for acetabular posterior column fractures involving the quadrilateral area of the acetabulum.METHODS The three-dimensional models of the normal and fractured pelvis and the five internal fixations were established using the computed tomography data of the pelvis of a living volunteer.After the vertebral body model was inserted in the way of origin matching and all cancellous bones were copied using the duplicated cancellous bone model as the subtractive entity,the Boolean operation was performed on the pelvis model to obtain the model of the complete pelvis cortical and cancellous bones.RESULTS In the standing position,the maximum stress was 46.21 MPa.In the sitting position,the sacrum bore the simulated gravity load at the upper end.When comparing the five fixations,there were no significant differences in the stress mean values among groups(sitting:P=0.9794;standing:P=0.9741).In terms of displacement,the average displacement of the internal iliac plate group was smaller than that of the spring plate group(P=0.002),and no differences were observed between the other pairs of groups(all P>0.05).In the standing position,there were no significant differences in the mean value of displacement among the groups(P=0.2985).It can be seen from the stress nephogram of the internal fixations in different positions that the stress of the internal fixation was mainly concentrated in the fracture segment.CONCLUSION There were no significant differences among the fixations for acetabular posterior column fractures involving the quadrilateral area of the acetabulum.

关 键 词：ACETABULUM Hip fractures ANALYSIS Finite element Fracture fixation Orthopedic fixation devices 

分 类 号：R687.3[医药卫生—骨科学]