Affiliations: [a] Department of Restorative Dentistry, Faculty of Dentistry, Istanbul University, Turkey | [b] Department of Restorative Dentistry, Faculty of Dentistry, Kocaeli University, Turkey | [c] Department of Biostatistcis and Medical Informatics, Kocaeli University Faculty of Medicine, Turkey
Correspondence:
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Corresponding author: Prof. Dr. Mustafa Demirci, 34093 Çapa, Istanbul, Turkey. Tel.: +90 212 414 20 20; Fax: +90 212 525 00 75; E-mail: md.demirci@gmail.com.
Abstract: Objective:The purpose of this study was to evaluate the effect of double-application coats and times on microtensile bond strength (μTBS) and adhesive-dentin interfaces created by dentin adhesive systems after 6 months of storage in water. Materials and methods:Two-hundred sixteen extracted non-carious human third molars were selected for the study. Single-Bond Universal (SU) and All-Bond Universal (AU), Adper Easy One (Eo) Self-Etch adhesive and Adper Single-Bond 2 (Sb) etch-and-rinse adhesive were applied to a flat dentin surface using three methods (1): dentin adhesives were applied as recommended by the manufacturers; (2): two consecutive coats of dentin adhesives were applied before photo-polymerization; and (3): a single coat of adhesive was applied but with twice the manufacturers recommended application time. Microtensile bond strength was determined either immediately or after 6 months of water storage. Data were analyzed using one-way analysis of variance and Tukey’s post-hoc tests. Results:At 24 h, groups 1, 2, and 3 exhibited statistically similar results for all dentin adhesive systems. For AU-Er, group 3 showed significantly higher bond strength than all group of AU-Se after 6 months. Conclusion:Universal adhesives seemed more stable against water degradation than traditional two-step etch-and-rinse and all-in-one systems within the 6-month period.
Keywords: Bond durability, double-application coat, double-application time, universal adhesive
