Resumo

SILVA, Daniella de Oliveira da et al. Chlorhexidine's effect at 2% in the mechanism of adhesion of glass ionomer: shear bond strength. Odontol. Clín.-Cient. (Online) [online]. 2012, vol.11, n.3, pp. 229-232. ISSN 1677-3888.

Objective: The goal of this study was to investigate the interference of chlorhexidine gel at 2% by shear tests the adhesion of Glass Ionomer Cement. Material and Methods: The 45 bovine teeth were used and made of blocks of 10x10 mm, including acrylic resin and polished until a flat dentin surface. Then randomly divided into 3 groups (n = 15): I - Control: the surface was cleaned with spray (water/air), dried and restored with glass ionomer Vitro Molar (DFL) II - the surface washed with spray (water/air), dried, followed by the application of chlorhexidine gel at 2%, left to stand for 2 minutes, cleaned with a "ball" of cotton and restored; III - the washing was done with an application of chlorhexidine gel at 2%, left rest to for 2 minutes, then cleaned with spray (water/air), dried and restored. The specimens were subjected to shear stress by the machine TIRATest 2420. Results: The results were analyzed by Kruskal-Wallis (p < 0,05). From the graphical analysis, we found the shear stresses with p = 0,049. It showed a significant difference between the tensions according the treatment applied. Conclusion: The application of chlorhexidine for 2 minutes and posterior rinsing behaved similar to the control group.

Palavras-chave : Glass Ionomer Cements; Chlorhexidine; Dental Restoration; Permanent; Shear Strength..