Resumo

MAEDA, Fernando A et al. Influence of desensitizing agents on the microshear bond strength of adhesive systems to dentin. Acta odontol. latinoam. [online]. 2009, vol.22, n.1, pp.41-45. ISSN 1852-4834.

The aim of this study was to evaluate the effect of desensitizing agents on the micro-shear bond strength of adhesive systems to dentin. Forty bovine teeth were divided into 8 groups (n=5): G1 - Single Bond (SB); G2 - G.H.F. + SB; G3 - Desensibilize + SB; G4 - Dessensiv + SB; G5 - Single Bond 2 (SB2); G6 - G.H.F. + SB2; G7 - Desensibilize + SB2; G8 - Dessensiv + SB2. In all of the groups, the desensitizing agents were applied after phosphoric acid etching and before the dentin adhesive application. Z250 composite resin tubes were bonded on the treated surface. After 24 hours, the teeth were tested in a universal machine. Data were submitted to ANOVA and Tukey’s test (5%). The results showed that the groups where Desensibilize and Dessensiv were applied exhibited smaller bond strength values.

Palavras-chave : Desensitizing agents; Dentinal adhesive; Microshear bond strength.