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BMC Oral Health
Published in: BMC Oral Health 1/2015

Open Access 01-12-2015 | Research article

Finite element method analysis of the periodontal ligament in mandibular canine movement with transparent tooth correction treatment

Authors: Yongqing Cai, Xiaoxiang Yang, Bingwei He, Jun Yao

Published in: BMC Oral Health | Issue 1/2015

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Abstract

Background

This study used the 3D finite element method to investigate canine’s displacements and stresses in the canine’s periodontal ligament (PDL) during canine’s translation, inclination, and rotation with transparent tooth correction treatment.

Methods

Finite element models were developed to simulate dynamic orthodontic treatments of the translation, inclination, and rotation of the left mandibular canine with transparent tooth correction system. Piecewise static simulations were performed to replicate the dynamic process of orthodontic treatments. The distribution and change trends of canine’s displacements and stresses in the canine’s PDL during the three types of tooth movements were obtained.

Results

Maximum displacements were observed at the crown and middle part in the translation case, at the crown in the inclination case, and at the crown and root part in the rotation case. The relative maximum von Mises and principal stresses were mainly found at the cervix of the PDL in the translation and inclination cases. In the translation case, tensile stress was mainly observed on the mesial and distal surfaces near the lingual side and compressive stress was located at the bottom of the labial surface. In the inclination case, tensile stress was mainly observed at the labial cervix and lingual apex and compressive stress was located at the lingual cervix and labial apex. In the rotation case, von Mises stress was mainly located at the cervix and inside the lingual surface, tensile stress was located on the distal surface, and compressive stress was detected on the mesial surface. The stress and displacement value rapidly decreased in the first few steps and then reached a plateau.

Conclusions

Canine’s movement type significantly influences the distribution of canine’s displacement and stresses in the canine’s PDL. Changes in canine’s displacement and stresses in the canine’s PDL were exponential in transparent tooth correction treatment.
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Metadata
Title
Finite element method analysis of the periodontal ligament in mandibular canine movement with transparent tooth correction treatment
Authors
Yongqing Cai
Xiaoxiang Yang
Bingwei He
Jun Yao
Publication date
01-12-2015
Publisher
BioMed Central
Published in
BMC Oral Health / Issue 1/2015
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-015-0091-x

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