[A three-dimensional finite element analysis for the biomechanical characteristics of orthodontic anchorage micro-implant].
OBJECTIVE
To establish a three-dimensional finite element model for orthodontic anchorage micro-implant,and to analyze the influence of different titled angles on the biomechanical characteristics of orthodontic anchorage implant-bone interface.


METHODS
ANSYS(Analysis System)finite element analysis software was used to perform the finite element modeling of the micro-implant with 7 different tilted angles, including 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees and 90 degrees. A simulated orthodontic force, which was 200 grams, was loaded mesiodistally to the mathematical models. The stress and displacement distribution on the implant-bone interface were analyzed.


RESULTS
As the titled angle increased, the Von-Mises stress at the cervix of the implants were 1.0792, 1.0104, 0.8848, 0.8181, 0.7583, 0.6339 and 0.5608MPa, while the displacement were 5.5513, 4.9900, 3.7419, 3.1264, 2.5874, 1.3624 and 0.8027microm


CONCLUSIONS
The micro-implant can be safely loaded with 200 grams of mesiodistal orthodontic force. The increase of the titled angle can efficaciously enhance the ability,implicating that the implant can bear a mesiodistal orthodontic force, vertical angle should be chosen when the micro-implant is embedded. Supported by Natural Science Foundation of Liaoning Province (20042076).
Zhang
Yang
Y
Department of Orthodontics, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, China. zhangyangcmu@yahoo.com.cn
Zhang
Dan
D
Feng
Cui-juan
CJ
D001696:Biomechanical Phenomena; D015921:Dental Implants; D020342:Finite Element Analysis; D006801:Humans; D052280:Orthodontic Anchorage Procedures
D015921:Dental Implants