Effects of Acetone Evaporation Duration of Dentin Bonding Agent on Microleakage

Abstract

The purpose of this study was to investigate the effect of acetone evaporation duration of dentin bonding agent on microleakage. Class V cavities (3x4x1.5 mm) were prepared on buccal surfaces of 40 human premolars, 1.5 mm above and below the cemento-enamel junction. Specimens were randomly divided into 4 groups (n=10 in each group), which were applied with dentin bonding agent at 0, 10, 20, and 30 min after dispension before being restored with resin-matrix composite. Specimens were stored in distilled water for 24 h at 37 C before and after being thermocycled for 500 times (5 C-55 C). After being immersed in 0.5% basic fuchsin for 24 h at 37 C, teeth were cut bucco-lingually and evaluated for dye penetration using a light microscope. The results from this study showed that the duration of acetone evaporation did not significantly affect the microleakage level (p=0.720), however cervical margins leaked significantly more than occlusal margins (p<0.05).