Resumo

CARVALHO, Rosana Costa Casanovas de et al. Bond strength of two adhesive systems to bovine enamel. Odontol. Clín.-Cient. (Online) [online]. 2012, vol.11, n.1, pp. 57-60. ISSN 1677-3888.

Objective: This study evaluated the shear bond strength of two adhesive systems, one etch-and-rinse adhesive and one self-etching adhesive, in bovine tooth enamel. Methods: Thirty-two plates of bovine enamel (16mm2) were fabricated and randomly divided into two experimental groups (n=16): G1- etch-and-rinse adhesive Magic Bond (Vigodent) and G2- self-etching adhesive AdheSE DC Activator (Ivoclar Vivadent). The adhesion area was enclosed in 4mm of diameter and adhesive system applied according to the manufacturer's recommendations. Then a cylinder of composite resin (2mm diameter x 2mm height) was made by the plate. The samples were stored in saline solution for 2 days at 37°C and subjected to mechanical testing of shear bond strength (0,5mm/min - TIRAtest 2420). Was used descriptive statistics and Student's t test (5%). Results: Magic Bond (11.2 ± 1.9) showed higher mean strength than AdheSE DC Activator (4.4 ± 1.5). Conclusion: The data suggest that the bond strength to bovine enamel is higher in etch-and-rinse adhesives than in self-etching adhesives.

Palavras-chave : Dental Enamel; Dentin-Bonding Agents; Shear Strength.