Orthodontic Process Safety Evaluation Based on Periodontal Ligament Capillary Pressure and Ogden Model

Abstract

Taking the lower maxillary incisors as an example and the orthodontic forces along the near–far middle direction, the orthodontic forces along the crown–root direction and the orthodontic moment around the tongue–cheek direction as loading condition, the biomechanical simulation of the tooth is carried out by the method of finite element simulation in this paper. The CT images of the skull are segmented and denoised by Mimics. The solid models of teeth, periodontal ligament (PDL), alveolar bone and brackets are established by Gomagic and Solidworks. The material characteristics of the PDL are defined by the two-order Ogden hyperelastic model. Taking the PDL capillary pressure as a criterion for orthodontic safety, combined with the stress response of PDL, the safe orthodontic force range of mandibular central incisors is obtained by ANSYS finite element software.

Orthodontic force prediction model of T-loop closing spring based on dynamic resistance model

“…If the orthodontic force is too large, it may damage the periodontal tissue. 15 If the orthodontic force is too small, the space closure cannot be completed. 16 This inevitably causes the orthodontist to repeatedly adjust the archwire in order to apply the appropriate orthodontic force.…”

Modeling and Experimentation of the Unidirectional Orthodontic Force of Second Sequential Loop Orthodontic Archwire

“…The tooth decay, dentin hypersensitivity, and more mouth diseases will be accompanied by it. The incidence of malocclusion is increasing year by year in adolescents [7][8][9][10][11]. The second sequential loop can effectively treat the tooth root compression malformation; it pulls the misplaced teeth to the correct location through the restoring force of archwire deformation.…”