Effect of different adhesive strategies and storage time on bond strength of bi-functional monomers to simulated endodontically-treated dentin

• Autor(a) principal: Girotto, Aline Carvalho [UNESP]
• Data de Publicação: 2021
• Outros Autores: Abuna, Gabriel, Sanchez-Puetate, Cristian [UNESP], Piccioni, Mayra Andressa [UNESP], Porto, Thiago Soares, Kuga, Milton Carlos [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4012/dmj.2021-074; http://hdl.handle.net/11449/233869
• topic: Adhesives; Endodontically-treated-dentin; Microtensile; Self-etching

Adhesive strategies were evaluated on the bond strength of bi-functional monomers bonded to endodontically-treated-dentin (ETD). Superficial dentin was removed on human molars. Teeth were immersed in 5 mL 2.5% NaOCl, followed by immersion in 5 mL 17% EDTA. Dentin surface impregnated with epoxy resin-based sealer was then divided four groups (n=10): Scotchbond Multi-Purpose (SBMP); Single Bond Universal (SBU); Optibond All-in-One (OPB); and Tetric-N-Bond Universal (TBU). After 24-h or 1-year-of-storage specimens were submitted to microtensile bond strength (µTBS) and failure classification. A confocal laser scanning microscope (CLSM) evaluated the hybrid layer formation. Two-way ANOVA and Tukey-HSD test were performed (α=5%). The µTBS did not present statistical differences among adhesive strategies after 24-h. Significant differences were found after 1-year-of-storage. CLSM analysis showed water infiltration and consequently degradation of the hybrid layer after 1-year-of-storage. The use of SBU universal adhesive on the self-etching mode on ETD produced more stable bond over the 1-year-of-storage.