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Feizbakhsh M, Kadkhodaei M, Zandian D, et al. Stress distribution in maxillary first molar periodontium using straight pull headgear with vertical and horizontal tubes: A finite element analysis. Dent Res J (Isfahan). 2017;14(2):117-124doi: 10.4103/1735-3327.205795.
Feizbakhsh, M., Kadkhodaei, M., Zandian, D., & Hosseinpour, Z. (2017). Stress distribution in maxillary first molar periodontium using straight pull headgear with vertical and horizontal tubes: A finite element analysis. Dental research journal, 14(2), 117-124. https://doi.org/10.4103/1735-3327.205795
Feizbakhsh, Masood, et al. "Stress distribution in maxillary first molar periodontium using straight pull headgear with vertical and horizontal tubes: A finite element analysis." Dental research journal vol. 14,2 (2017): 117-124. doi: https://doi.org/10.4103/1735-3327.205795
Feizbakhsh M, Kadkhodaei M, Zandian D, Hosseinpour Z. Stress distribution in maxillary first molar periodontium using straight pull headgear with vertical and horizontal tubes: A finite element analysis. Dent Res J (Isfahan). 2017 Mar-Apr;14(2):117-124. doi: 10.4103/1735-3327.205795. PMID: 28584535; PMCID: PMC5443006.
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Dent Res J (Isfahan). 2017 Mar-Apr;14(2):117-124. doi: 10.4103/1735-3327.205795.

Stress distribution in maxillary first molar periodontium using straight pull headgear with vertical and horizontal tubes: A finite element analysis.

Dental research journal

Masood Feizbakhsh, Mahmoud Kadkhodaei, Dana Zandian, Zahra Hosseinpour

Affiliations

  1. Department of Orthodontics School of Dentistry, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran.
  2. Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran.

PMID: 28584535 PMCID: PMC5443006 DOI: 10.4103/1735-3327.205795

Abstract

BACKGROUND: One of the most effective ways for distal movement of molars to treat Class II malocclusion is using extraoral force through a headgear device. The purpose of this study was the comparison of stress distribution in maxillary first molar periodontium using straight pull headgear in vertical and horizontal tubes through finite element method.

MATERIALS AND METHODS: Based on the real geometry model, a basic model of the first molar and maxillary bone was obtained using three-dimensional imaging of the skull. After the geometric modeling of periodontium components through CATIA software and the definition of mechanical properties and element classification, a force of 150 g for each headgear was defined in ABAQUS software. Consequently, Von Mises and Principal stresses were evaluated. The statistical analysis was performed using T-paired and Wilcoxon nonparametric tests.

RESULTS: Extension of areas with Von Mises and Principal stresses utilizing straight pull headgear with a vertical tube was not different from that of using a horizontal tube, but the numerical value of the Von Mises stress in the vertical tube was significantly reduced (

CONCLUSION: Based on the results, when force applied to the straight pull headgear with a vertical tube, Von Mises stress was reduced significantly in comparison with the horizontal tube. Therefore, to correct the mesiolingual movement of the maxillary first molar, vertical headgear tube is recommended.

Keywords: Dental stress analyses; Finite element analysis; extraoral traction appliance; maxilla; molar

Conflict of interest statement

The authors of this manuscript declare that they have no conflicts of interest, real or perceived, financial or non-financial in this article.

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