29 February 2016 Evaluation of microshear bond strength of resin composites to enamel of dental adhesive systems associated with Er,Cr:YSGG laser
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Proceedings Volume 9692, Lasers in Dentistry XXII; 96920N (2016); doi: 10.1117/12.2213495
Event: SPIE BiOS, 2016, San Francisco, California, United States
Abstract
The aim of this in vitro study was to evaluate the microshear bond strength (μSBS) of resin composite to enamel etching by Er,Cr:YSGG laser with the use of two differents adhesives systems. Fifty freshly extracted human molars halves were embedded in acrylic resin before preparation for the study, making a total of up to 100 available samples. The specimens were randomly assigned into six groups (η=10) according to substrate pre-treatment and adhesive system on the enamel. A two-step self-etching primer system (Clearfil SE Bond) and a universal adhesive used as an etch-andrinse adhesive (Adper Single Bond Universal) were applied to the nonirradiated enamel surface according to manufacturer’s instructions, as control groups (Control CF and Control SB, respectively). For the other groups, enamel surfaces were previously irradiated with the Er,Cr:YSGG laser with 0.5 W, 75 mJ and 66 J/cm2 (CF 5 Hz and SB 5 Hz) and 1.25 W, 50 mJ and 44 J/cm2 (CF 15 Hz and SB 15 Hz). Irradiation was performed under air (50%) and water (50%) cooling. An independent t-test was performed to compare the adhesive systems. Mean μSBS ± sd (MPa) for each group was 16.857 ± 2.61, 17.87 ± 5.83, 12.23 ± 2.02, 9.88 ± 2.26, 15.94 ± 1.98, 17.62 ± 2.10, respectively. The control groups and the 50 mJ laser groups showed no statistically significant differences, regardless of the adhesive system used. The results obtained lead us to affirm that the bonding interaction of adhesives to enamel depends not only on the morphological aspects of the dental surface, but also on the characteristics of the adhesive employed and the parameters of the laser.
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Patricia Fernandes Cassimiro-Silva, Denise Maria Zezell, Gabriela Queiroz de Melo Monteiro, Carolina Benetti, Carlos de Paula Eduardo, Anderson Stevens Leônidas Gomes, "Evaluation of microshear bond strength of resin composites to enamel of dental adhesive systems associated with Er,Cr:YSGG laser", Proc. SPIE 9692, Lasers in Dentistry XXII, 96920N (29 February 2016); doi: 10.1117/12.2213495; http://dx.doi.org/10.1117/12.2213495
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KEYWORDS
Adhesives

Etching

Laser bonding

Control systems

Composite resins

Composites

Laser dentistry

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