Impact of repair protocols on the bond strength to composite resin.

Autor: Vilela ALR; Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil., Soares AG; Department of Occlusion, Fixed Prosthodontics and Dental Materials, Federal University of Uberlândia, Av. Pará, 1720, Bloco 4L, Sala 4LA42, Campus Umuarama, Uberlândia, MG, CEP 38400-902, Brazil., Machado AC; Health Technical School, Federal University of Uberlândia, Uberlândia, MG, Brazil., Borges MG; Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil., Raposo LHA; Department of Occlusion, Fixed Prosthodontics and Dental Materials, Federal University of Uberlândia, Av. Pará, 1720, Bloco 4L, Sala 4LA42, Campus Umuarama, Uberlândia, MG, CEP 38400-902, Brazil. raposo@ufu.br., Menezes MS; Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil.
Jazyk: angličtina
Zdroj: Odontology [Odontology] 2024 Sep 14. Date of Electronic Publication: 2024 Sep 14.
DOI: 10.1007/s10266-024-01003-2
Abstrakt: This study evaluated the impact of different repair protocols on a composite resin substrate using distinct bonding agents submitted or not to artificial aging. Unopened sets of a single-step universal adhesive system (UA) and silane-coupling agents, a single-step pre-hydrolyzed (PH) or a two-step immediately hydrolyzed (IH), were used. Half of the sets were subjected to artificial aging being stored at 48 °C for 30 days, while the other half remained unaged. The composite resin substrates were prepared and aged in distilled water, sandblasted (Al 2 O 3 ), and cleaned. Then the different repair protocols were applied according to the groups. UA was used without a previous silane layer, while PH and IH were applied followed by a single-step etch-and-rinse adhesive system. Adhesive systems were light-activated, and four composite resin cylinders were formed over the substrate. After 24 h, the specimens were subjected to microshear bond strength (μSBS) test and failure mode analysis. The μSBS data were subjected to two-way ANOVA followed by Tukey HSD; Kruskal-Wallis analysis was used for failure mode distribution (α = 0.05). After aging the products, UA showed higher bond strength, while PH had significantly lower results, and IH showed no significant differences (p = 0.157). No significant differences were found for bond strength among the repair protocols when using non-aged products (p > 0.05). The protocols using UA and IH showed no significant differences between aged and non-aged bottles, whereas PH exhibited lower bond strength when comparing aged and non-aged products. More cohesive failures were observed in the resin substrate for the IH group without aging.
(© 2024. The Author(s), under exclusive licence to The Society of The Nippon Dental University.)
Databáze: MEDLINE
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