Three-dimensional finite element analysis of canine distalization through reducing resistance and distraction osteogenesis

Shu Lin-jing; Xue Jun-jie; Wang Jing; Xu Yuan-zhi; Wang Fei-yu; Tang Xiao-shan

doi:10.3969/j.issn.2095-4344.2014.11.018

Abstract：BACKGROUND:Peridental membrane distraction osteogenesis exerts the functions at peridental membrane and leads to tooth movement. Alveolar bone distraction osteogenesis produces tooth movement through the displacement of the whole bone plate. <br> OBJECTIVE:To establish three-dimensional finite element model of upper and lower jaw of healthy adults under three different conditions, and to compare the stress distribution and distal movement of the models using three-dimensional finite element analysis method. <br> METHODS:Model 1:three-dimensional finite element model of the canine under normal conditions using a <br> variety of software;Model 2:three-dimensional finite element model of the canine after distracting osteggenesis of the periodontal ligament;Model 3, three-dimensional finite element model of the canine after reducing resistance and distracting osteggenesis of the alveolar bone. The force loadings were stimulated among these models. <br> RESULTS AND CONCLUSION:The biggest displacements on those three models occurred in canine crown on 1/3, and the displacement quantity on canine was model 2>model 3>model 1. The biggest equivalent stress concentrated in distal alveolar crest, and the equivalent stress was model 2<model 1<model 3. In the process of canine distal movement, reducing bone resistance and distracting osteggenesis, especial y distal alveolar crest of canine, can accelerate the tooth moving speed effectively. And the two ways successful y avoid the loss of anchorage. We should notice that the canine has distal motion tendency under the action of force, appropriate measures should be taken to control it in clinical work.