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Influence of surface moisture condition on the bond strength to dentin of etch-and-rinse adhesive systems
Remote (Português (Brasil))

Keywords

Tensile strength
Solvents
Humidity
In vitro

How to Cite

1.
Münchow EA, Valente LL, Bossardi M, Priebe TC, Zanchi CH, Piva E. Influence of surface moisture condition on the bond strength to dentin of etch-and-rinse adhesive systems. Braz. J. Oral Sci. [Internet]. 2010 Dec. 30 [cited 2024 Apr. 14];13(3):182-6. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640884

Abstract

Aim: To evaluate the immediate microtensile bond strength (µTBS) of three two-step etch-andrinse adhesive systems applied under different dentin surface moisture conditions. Methods: Class V cavities were prepared in seventy-two bovine incisors. Each tooth was randomly allocated into three groups, according to the adhesive system used: Single Bond 2 (SB), Prime & Bond 2.1 (PB) and XP Bond (XPB). Each group was divided in three subgroups, according to the dentin moisture condition: over-wet, moist and dry (n=8). For the moist subgroups the adhesive was applied as to the manufacturer’s instructions; for the over-wet ones, without drying the cavity after the rinsing procedure; and for the dry subgroups, drying the surface for 20 s. The teeth were restored with Filtek Z-250 and stored in distilled water (24 h); next, each restoration was sectioned in beam-shaped specimens which were stored for 24 h at 37 °C. Each specimen was submitted to µTBS test (EMIC), and data were analyzed using two-way ANOVA and Tukey test (p<0.05). Results: There was a statistically significant interaction between the adhesive system type and the dentin surface moisture condition (p=0.003). SB and XPB presented higher bond strength in the moist dentin condition, and PB showed high µTBS values in the dry substrate. Conclusions: The moisture condition influenced the bond strength between the adhesives and dentin. SB performed better in the moist condition, whereas PB and XPB showed satisfactory bond strength in the moist and in the dry substrates. The over-wet dentin condition only impaired bond strength to SB and XPB.
Remote (Português (Brasil))
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Copyright (c) 2015 Eliseu Aldrighi Münchow, Lisia Lorea Valente, Mayara Bossardi, Tanize Cezar Priebe, Cesar Henrique Zanchi, Evandro Piva

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