Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (13): 2318-2323.doi: 10.3969/j.issn.1673-8225.2012.13.009

Previous Articles     Next Articles

The stress and strain distributions of periodontal ligament of maxillary canine under the orthodontics force 

Ni Ling, Wu Yang, Dai Hong-wei   

  1. Department of Orthodontics, Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing  400015, China
  • Received:2012-01-09 Revised:2012-02-06 Online:2012-03-25 Published:2012-03-25
  • Contact: author: Wu Yang, Attending physician, Department of Orthodontics, Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing 400015, China dai_tg@yahoo.cn
  • About author:Ni Ling★, Studying for master’s degree, Physician, Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing 400015, China niling2006@yahoo.com.cn

PDF

313

Abstract:

BACKGROUND: The stress-strain analysis of the periodontal ligament under the orthodontic force can provide theoretical basis for the orthodontics design.
OBJECTIVE: To analyze the stress and strain distributions of periodontal ligament of maxillary canine under the orthodontics force.
METHODS: The stress and strain distributions of periodontal ligament of maxillary canine were analyzed under the orthodontics force by assuming the root of maxillary canine to be paraboloidal shape model. The model was loaded and solved; the approximate shear force, axial force, bending moment and torque were loaded on the model in order to analyze the stress and strain distributions of the periodontal ligament. 
RESULTS AND CONCLUSION: The results of theoretical analysis and numerical results of stress distribution in the periodontal ligament were very similar, the maximum difference value was 13.4%, and the largest Von misses stress of the periodontal ligament was in the alveolar crest. The results show that the stress and strain distributions of the periodontal ligament were complicated; they were not only related with the root length, but also related with different load power system. The dentist should rationally take all these parameters into account in the clinical treatment. 

CLC Number: