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01-03-2010 | Original Article

Bond durability in erbium:yttrium–aluminum–garnet laser-irradiated enamel

Authors: F. L. B. Amaral, V. Colucci, A. E. Souza-Gabriel, M. A. Chinelatti, R. G. Palma-Dibb, S. A. M. Corona

Published in: Lasers in Medical Science | Issue 2/2010

Abstract

This study sought to evaluate the influence of thermocycling and water storage on the microtensile bond strength of composite resin bonded to erbium:yttrium–aluminum–garnet (Er:YAG)-irradiated and bur-prepared enamel. Eighty bovine incisors were selected and sectioned. Specimens were ground to produce a flat enamel surface. Samples were randomly assigned according to cavity preparation device: (I) Er:YAG laser and (II) high-speed turbine, and were subsequently restored with composite resin. They were subdivided according to the duration of water storage (WS)/number of thermocycles (TCs): 24 h WS/no TCs; 7 days WS/500 TCs; 1 month WS/2,000 TCs; 6 months WS/12,000 TCs. The teeth were sectioned into 1.0 mm²-thick slabs and subjected to tensile stress in a universal testing machine. Data were submitted to two-way analysis of variance (ANOVA) and Tukey’s test at a 0.05 significance level. The different periods of water storage and thermocycling did not influence the microtensile bond strength (µTBS) values in the Er:YAG laser-prepared groups. In bur-prepared enamel, the group submitted to 12,000 TCs/6 months’ WS (IID) showed a significant decrease in bond strength values when compared to the group stored in water for 24 h and not submitted to thermocycling (IIA), but values were statistically similar to those obtained in all Er:YAG laser groups and in the bur- prepared groups degraded with 500 TCs/1 week WS (IIB) or 2,000 TCs/1 month WS (IIC). It may be concluded that adhesion of an etch-and-rinse adhesive to Er:YAG laser-irradiated enamel was not affected by the methods used to simulate degradation of the adhesive interface and was similar to adhesion in the bur-prepared groups in all periods of water storage and thermocycling.

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Title: Bond durability in erbium:yttrium–aluminum–garnet laser-irradiated enamel
Authors: F. L. B. Amaral
V. Colucci
A. E. Souza-Gabriel
M. A. Chinelatti
R. G. Palma-Dibb
S. A. M. Corona
Publication date: 01-03-2010
Publisher: Springer-Verlag
Published in: Lasers in Medical Science / Issue 2/2010
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-008-0593-8

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Bond durability in erbium:yttrium–aluminum–garnet laser-irradiated enamel

Abstract

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