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Odontology. 2016 May;104(2):163-9. doi: 10.1007/s10266-015-0203-8. Epub 2015 Apr 7.

Microtensile bond strength of a resin-based fissure sealant to Er,Cr:YSGG laser-etched primary enamel.

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Faculty of Dentistry, Department of Paediatric Dentistry, Yeditepe University, Bagdat Caddesi No. 238, Goztepe, Kadikoy, 34728, Istanbul, Turkey.
Faculty of Dentistry, Department of Paediatric Dentistry, Gazi University, 8. Cd. 1.Sok., Emek, 06510, Ankara, Turkey.


The aim of this study was to evaluate the effect of Er,Cr:YSGG laser pre-treatment alone, or associated with acid-etching, on the microtensile bond strength of a resin-based fissure sealant to primary enamel. Twenty-five human primary molars were randomly divided into five groups including (1) 35 % acid etching, (2) 2.5-W laser etching, (3) 3.5-W laser etching, (4) 2.5-W laser etching + acid etching, and (5) 3.5-W laser etching + acid etching. Er,Cr:YSGG laser was used at a wavelength of 2.780 nm and pulse duration of 140-200 μs with a repetition rate of 20 Hz. Following surface pre-treatment, the fissure sealant (ClinPro™, 3M Dental Products) was applied. Each tooth was sectioned and subjected to microtensile testing. Kruskal-Wallis test was used for statistical analysis. The level of significance was set at p < 0.05. The microtensile bond strength values of group 1 were significantly higher than those of group 2, while no statistically significant difference was detected between groups 1, 3, 4, and 5. It was concluded that 3.5-W laser etching produced results comparable to conventional acid etching technique, whereas 2.5-W laser etching was not able to yield adequate bonding performance.


Acid etching; Er,Cr:YSGG laser; Fissure sealant; Microtensile bond strength; Primary teeth

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