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CC BY-NC-ND 4.0 · European Journal of General Dentistry 2013; 2(02): 124-129
DOI: 10.4103/2278-9626.112309
Original Article

Comparative analysis of adhesive failure of orthodontic resins: An in vitro mechanical test with the finite element method

Ana Leticia Rocha Avila
Department of Orthodontics, School of Health and Biosciences, Pontifical Catholic University of Paraná, Curitiba, Brazil
,
Mildred Ballin Hecke
1   Numerical Methods in Engineering Graduate Program, Federal University of Paraná (UFPR), Curitiba, Brazil
,
Ana Paula Gebert de Oliveira Franco
2   Department of Dentistry, Pontifical Catholic University of Paraná, Curitiba, Brazil
,
Marco Antonio Amorin Vasco
3   Department of Prosthodontics, Oral Rehabilitation, USP, Brazil
,
Dauro Douglas Oliveira
4   Department of Orthodontics, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Brazil
,
Orlando Motohiro Tanaka
Department of Orthodontics, School of Health and Biosciences, Pontifical Catholic University of Paraná, Curitiba, Brazil
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Abstract

Objective: The purpose of this study was to validate finite element (FE) method as a reliable adhesive shear strength test method by investigating and comparing the results from in vitro mechanical tests and 3-D FE simulations. Materials and Methods: Four groups of teeth (n=15) using Transbond XT (3M Unitek, Monrovia, CA) and Enlight Ormco (Glendora, CA) with metallic and ceramic brackets (Twin-Edge and InVu, TP Orthodontics, Inc., La Porte, IN) were obtained and submitted to shear bond strength tests. Subsequently, an equivalent geometric model was subjected to FE modeling analysis. ANOVA tests indicated a statistically significant difference (P<0.05) between the shear bond strength of the two bracket types regardless of the resin, and there was no interaction between the resin and bracket type. Results: FE analysis showed the stress distribution in the adhesive layer and revealed an increased stress distribution in the ceramic brackets. These results were consistent with in vitro detachment experiments. Conclusions: This study establishes that FE sub-modeling can be used to simulate adhesive resistance.

Keywords

Adhesive failure - brackets - finite element method


Publication History

Article published online:
01 November 2021

© 2013. European Journal of General Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/.)

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