• F Cebe, M Bulbul, I Simsek, M A Cebe, and B Ozturk.
• Department of Restorative Dentistry, Faculty of Dentistry, Abant Izzet Baysal University, Bolu, Turkey.
• Niger J Clin Pract. 2017 Jun 1; 20 (6): 734-740.

PurposeTo assess the effect of the erbium:yttrium aluminum garnet (Er:YAG) laser on bond strength of a total-etch adhesive system to the caries-affected dentin on the gingival wall.Materials And MethodsTen human molars with proximal carious lesions were randomly divided into two groups. In the first group, the carious dentin was removed with a bur, whereas in the second group it was removed with the Er:YAG laser. Carious lesions were excavated with one of these two techniques until laser fluorescence values decreased to 15 in the center of the lesions. The teeth were then restored with a total-etch adhesive system (Adper Single Bond 2) and composite resin (Filtek Z250). Five teeth from each group were sectioned to obtain 1 mm2 stick-shaped microtensile specimens from each tooth. Twenty-five specimens were obtained for each group with using this technique. The data were analyzed in independent-samples t-test (α = 0.05). For each removal technique, one sample was analyzed using scanning electron microscopy.ResultsNo statistically significant differences were found between the bond strength of the Er:YAG laser and the bur-treated groups (P > 0.05).ConclusionThe Er:YAG laser treatment did not negatively affect the bonding performance of the total-etch adhesive system to caries-affected dentin on the gingival wall.

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