[Three dimension finite element analysis of anisotropic mandible with dental implants effect on implant-bone interface].
OBJECTIVE
To establish anisotropic mandible model with dental implants and to investigate the effect of anisotropy material on stress and strain distribution of implant-bone interface.


METHODS
Three-dimensional finite element models of whole mandible with anisotropic and equivalent isotropic material were created by CT scanning and universal surgical integration system (USIS) software developed by the authors. Two ITI threaded implants were implanted in the posterior teeth area. The values of principal stress and principal strain on the bone around dental implants were calculated in two different finite element models with buccolingual load.


RESULTS
In the anisotropic mandible model, nearly all values of the principal stress and principal strain on cortical and cancellous bone increased compared with the equivalent isotropy model, 2.1%-74.1% for principal stress and 4.7%-57.3% for principal strain, but 10. 3%-71.4% for principal stress and 19.5%-63.4% for principal strain on cancellous bone.


CONCLUSIONS
In the three-dimensional finite element analysis, anisotropic mandible model with dental implants has an apparent effect on the stress and strains of the implant-bone interface. Anisotropic mechanical properties of mandible should be emphasized in biomechanical study.
Ding
Xi
X
Department of Stomatology, The First Hospital Affiliated of Wenzhou Medical College, Wenzhou Zhejiang 325000, China. dingxi@hosp1.ac.cn
Zhu
Xing-Hao
XH
Zhang
Xiu-Hua
XH
Liao
Sheng-Hui
SH
Zhang-Lin
Chen
Hong
H
D003758:Dental Implantation, Endosseous / Q000379:methods; D015921:Dental Implants; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D008334:Mandible; D008953:Models, Anatomic; D013314:Stress, Mechanical
D015921:Dental Implants