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ORIGINAL RESEARCH
Year : 2021  |  Volume : 24  |  Issue : 2  |  Page : 179-183

Hybrid layer formation and bond strength to dentin impregnated with endodontic sealer after cleaning protocols


Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, São Paulo, Brazil

Correspondence Address:
Dr. Joao Felipe Besegato
Araraquara School of Dentistry, 1680 Humaitá Street, 3rd Floor, Araraquara 14801-903, São Paulo
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jcd.jcd_14_21

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Aims: This study evaluated the hybrid layer formation and bond strength of two adhesive systems, Scotchbond Universal (U) or Adper Scotchbond Multi Purpose (M), after cleaning protocols using ethanol (E) or xylol (X), to dentin impregnated with an epoxy-resin based endodontic sealer. Settings and Design: The study design was an Experimental in vitro study. Methodology: One hundred bovine dentin specimens were randomly allocated into five groups (n = 10): Computed tomography (CT) (control): Only acid etching + M; E+U; X+U; E+M. After the specimen preparation, images were obtained using confocal laser scanning microscopy to evaluate the hybrid layer formation. For microshear bond strength test, the dentin specimens were included in polyvinyl chloride tubes and four resin composite cylinders were placed on the surface. The analysis was performed 24 h after storage. Statistical Analysis Used: For parametric and nonparametric data, analysis of variance followed by Tukey test and Kruskal–Wallis, followed by Dunn test were, respectively, used at a significance level of 5%. Results: Regarding hybrid layer formation, all experimental groups were similar to each other (P > 0.05). However, CT showed higher hybrid layer formation than other groups (P < 0.05), except in relation to X+M (P > 0.05). Bond strength was statistically similar among all groups (P > 0.05). Conclusions: Hybrid layer formation in dentin impregnated with epoxy resin-based sealer and submitted to different cleaning protocols was similar to the control group only for X+M. No differences were found among the experimental groups. Regarding the bond strength, no effect was observed for any group.


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