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The Scientific World Journal
Volume 2015, Article ID 903451, 7 pages
http://dx.doi.org/10.1155/2015/903451
Research Article

Shear Bond Strength of Orthodontic Brackets Fixed with Remineralizing Adhesive Systems after Simulating One Year of Orthodontic Treatment

1CEUMA University, Josué Montello 01, Renascença II, 65.075-120 São Luís, MA, Brazil
2São Paulo State University, Avenida Engenheiro Francisco José Longo 777, 12245-000 São José dos Campos, SP, Brazil
3University of Cuiaba, Beira Rio 3100, Jardim Europa, 78065-900 Cuiabá, MT, Brazil
4São Paulo State University, Rua Humaita 1680, 14803-901 Araraquara, SP, Brazil
5Federal University of Maranhão, Avenida dos Portugueses 1966, 65080-805 São Luis, MA, Brazil

Received 13 April 2015; Accepted 5 August 2015

Academic Editor: Grant McIntyre

Copyright © 2015 Gisele Lima Bezerra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The objective of this study is to assess, in vitro, the shear bond strength of orthodontic brackets fixed with remineralizing adhesive systems submitted to thermomechanical cycling, simulating one year of orthodontic treatment. Sixty-four bovine incisor teeth were randomly divided into 4 experimental groups (): XT: Transbond XT, QC: Quick Cure, OL: Ortholite Color, and SEP: Transbond Plus Self-Etching Primer. The samples were submitted to thermomechanical cycling simulating one year of orthodontic treatment. Shear bond strength tests were carried out using a universal testing machine with a load cell of 50 KgF at 0.5 mm/minute. The samples were examined with a stereomicroscope and a scanning electron microscope (SEM) in order to analyze enamel surface and Adhesive Remnant Index (ARI). Kruskal-Wallis and Mann-Whitney (with Bonferroni correction) tests showed a significant difference between the studied groups (). Groups XT, QC, and SEP presented the highest values of adhesive resistance and no statistical differences were found between them. The highest frequency of failures between enamel and adhesive was observed in groups XT, QC, and OL. Quick Cure (QC) remineralizing adhesive system presented average adhesive resistance values similar to conventional (XT) and self-etching (SEP) adhesives, while remineralizing system (OL) provided the lowest values of adhesive resistance.