[Finite element simulation of bone grafting process for avascular necrosis of femoral head].
Based on the unilateral CT images of a clinical patient in stage III for avascular necrosis of femoral head, three-dimensional finite element models of proximal femur are established, including normal model, necrosis model and prothetic model. Based on the same set of CT images, the material properties are assigned to the three finite element models respectively. Finally, the process of bone grafting for avascular necrosis of femoral head is simulated with finite element analysis. The results indicate that when the necrosis parts of femoral head are removed, the stress and displacement of proximal femur increase accordingly, and after the surgical operation of bone grafting, the stress and displacement of proximal femur can decrease effectively and become closer to the normal state. All the results indicate that the bone grafting operation is effective and reliable.
Lian
Zhiqiang
Z
State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116023, China. lianzq75@163.com
Zhao
Dewei
D
Zhang
Hongwu
H
Wang
Weiming
W
D016025:Bone Transplantation / Q000379:methods*; D003198:Computer Simulation; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000601:surgery*; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D008954:Models, Biological; D014057:Tomography, X-Ray Computed