[Influence of trabecular microstructure modeling on finite element analysis of dental implant].
OBJECTIVE
To analyze the influence of trabecular microstructure modeling on the biomechanical distribution of implant-bone interface with a three-dimensional finite element mandible model of trabecular structure.


METHODS
Dental implants were embeded in the mandibles of a beagle dog. After three months of the implant installation, the mandibles with dental implants were harvested and scaned by micro-CT and cone-beam CT. Two three-dimensional finite element mandible models, trabecular microstructure(precise model) and macrostructure(simplified model), were built. The values of stress and strain of implant-bone interface were calculated using the software of Ansys 14.0.


RESULTS
Compared with the simplified model, the precise models' average values of the implant bone interface stress increased obviously and its maximum values did not change greatly. The maximum values of quivalent stress of the precise models were 80% and 110% of the simplified model and the average values were 170% and 290% of simplified model. The maximum and average values of equivalent strain of precise models were obviously decreased, and the maximum values of the equivalent effect strain were 17% and 26% of simplified model and the average ones were 21% and 16% of simplified model respectively. Stress and strain concentrations at implant-bone interface were obvious in the simplified model. However, the distributions of stress and strain were uniform in the precise model.


CONCLUSIONS
The precise model has significant effect on the distribution of stress and strain at implant-bone interface.
Department of Stomatology, The First Hospital Affiliated of Wenzhou Medical University, Wenzhou Zhejiang 325000, China.
M J
MJ
Shen
Department of Stomatology, The First Hospital Affiliated of Wenzhou Medical University, Wenzhou Zhejiang 325000, China.
G G
GG
Wang
Department of Stomatology, The First Hospital Affiliated of Wenzhou Medical University, Wenzhou Zhejiang 325000, China.
X H
XH
Zhu
Department of Stomatology, The First Hospital Affiliated of Wenzhou Medical University, Wenzhou Zhejiang 325000, China.
X
X
Ding
D000818:Animals; D001696:Biomechanical Phenomena; D054893:Cone-Beam Computed Tomography; D015921:Dental Implants; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis; D004285:Dogs; D020342:Finite Element Analysis; D008334:Mandible; D008954:Models, Biological; D012984:Software; D013314:Stress, Mechanical; D055114:X-Ray Microtomography
D015921:Dental Implants