The effect of storage and air-drying on solvent evaporation of three different one-bottle adhesive systems: a comparative in-vitro study

The aim of this study is to clarify the relationship between the duration of storage and air-drying of one-bottle adhesive systems containing different solvents and the evaporation degree (ED) by gravimetric method. The evaporation degree (ED) of XP Bond (Dentsply) which contains tertiary butanol and water, Prime and Bond NT (Dentsply) which contains acetone and water and Adper Single Bond (3M ESPE) which contains ethanol and water, was determined by storage respectively, 5, 10, 30, 60, 120 and 180 minutes and also without air-drying and after, respectively, 5- and 10-seconds air-drying using a gravimetric method. The evaporation degree (ED) increased with extension of air-drying time. Among the adhesives tested, Prime and Bond NT which contains acetone and water showed the largest ED, followed by Adper Single Bond which contains ethanol and water and XP Bond which contains tertiary butanol and water in this order. Air-drying of one-bottle adhesive systems had a significant effect on the degree of solvent evaporation (ED). It is therefore beneficial to remove solvents of the one-bottle adhesive systems as much as possible by thorough, strong air-drying in order to achieve a strong adhesive layer at the interface.