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01-03-2014 | Original Article

Microtensile bond strength analysis of adhesive systems to Er:YAG and Er,Cr:YSGG laser-treated dentin

Authors: Thaysa Monteiro Ramos, Thayanne Monteiro Ramos-Oliveira, Simone Gonçalves Moretto, Patricia Moreira de Freitas, Marcella Esteves-Oliveira, Carlos de Paula Eduardo

Published in: Lasers in Medical Science | Issue 2/2014

Abstract

The aim of this in vitro study was to evaluate the effect of different surface treatments (control, diamond bur, erbium-doped yttrium aluminum garnet (Er:YAG) laser, and erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser) on sound dentin surface morphology and on microtensile bond strength (μTBS). Sixteen dentin fragments were randomly divided into four groups (n = 4), and different surface treatments were analyzed by scanning electron microscopy. Ninety-six third molars were randomly divided into eight groups (n = 12) according to type of surface treatment and adhesive system: G1 = Control + Clearfil SE Bond (SE); G2 = Control + Single Bond (SB); G3 = diamond bur (DB) + SE; G4 = DB + SB, G5 = Er:YAG laser (2.94 μm, 60 mJ, 2 Hz, 0.12 W, 19.3 J/cm²) + SE; G6 = Er:YAG + SB, G7 = Er,Cr:YSGG laser (2.78 μm, 50 mJ, 30 Hz, 1.5 W, 4.5 J/cm²) + SE; and G8 = Er,Cr:YSGG + SB. Composite blocks were bonded to the samples, and after 24-h storage in distilled/deionized water (37 °C), stick-shaped samples were obtained and submitted to μTBS test. Bond strength values (in megapascal) were analyzed by two-way ANOVA and Tukey tests (α = 0.05). G1 (54.69 ± 7.8 MPa) showed the highest mean, which was statistically significantly higher than all the other groups (p < 0.05). For all treatments, SE showed higher bond strength than SB, except only for Er,Cr:YSGG treatment, in which the systems did not differ statistically from each other. Based on the irradiation parameters considered in this study, it can be concluded that Er:YAG and Er,Cr:YSGG irradiation presented lower values than the control group; however, their association with self-etching adhesive does not have a significantly negative effect on sound dentin (μTBS values of >20 MPa).

Er:YAG laser is a property of the Special Laboratory of Lasers in Dentistry (LELO-FOUSP) (FAPESP grant no. 97/10823-0).

Er,Cr:YSGG laser is a property of the Department of Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University, Aachen, Germany.

Universal testing machine belonging to the Department of Dental Materials, School of Dentistry, University of São Paulo.

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Title: Microtensile bond strength analysis of adhesive systems to Er:YAG and Er,Cr:YSGG laser-treated dentin
Authors: Thaysa Monteiro Ramos
Thayanne Monteiro Ramos-Oliveira
Simone Gonçalves Moretto
Patricia Moreira de Freitas
Marcella Esteves-Oliveira
Carlos de Paula Eduardo
Publication date: 01-03-2014
Publisher: Springer London
Published in: Lasers in Medical Science / Issue 2/2014
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-012-1261-6

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Microtensile bond strength analysis of adhesive systems to Er:YAG and Er,Cr:YSGG laser-treated dentin

Abstract

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Abstract

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