Orthodontics Simulation and Finite Element Analysis of Submaxilla Dentition

Abstract

Objective The principle and method of the force application is researched in orthodontics field, providing the scale and location of force for clinical orthodontics. Methods Reverse engineering software is used to reconstruct a 3-D mandible finite element model, the MBT bracket and straight archwire on the dentition are modeled on it. Change the elastic module of archwire to simulate four stages of orthodontics and the displacement and stress on dentition and mandible are acquired. Results The finite element results of dentition and mandible under short Ⅱ elastics are obtained, the results show that titanium-nickel archwire may provide major displacement for dentition; O and stainless steel have good force-transmission in teeth. The stress of single tooth and mandible are symmetrical except for the position where loads are applied. Conclusions Under the short II elastics loads, bone absorption don’t appear and the bodily movement of mandible is arose.