Effect of storage and acid etching on the tensile bond strength of composite resins to glass ionomer cement / Efeito da armazenagem e do condicionamento ácido na resistência à tração de resinas compostas e cimentos de ionômero de vidro

ABSTRACT

This in vitro study evaluates the effect of storage time and acid etching on the tensile bond strength of glass ionomer cement to composite resins. The bonded assemblies were stored at 100 percent relative humidity and 37°C for 1 hour, 1 day, 1 week, 1 month and 3 months. The test specimen was loaded at tension to failure on an Otto Wolpert-Werke testing instrument with a crosshead speed of 6 mm/min. The results showed a significant statistical difference for etched Vidrion F when compared to etched Ketac Bond at all storage periods. The unetched samples were statistically similar at 3 months, with the highest values for Vidrion F