Abstract
This study examined changes in shear bond strength of glass ionomer cements for luting to dentin from initial setting using three different mixing ratios. Conventional and resin-modified glass ionomer cements for luting were used. The cast dental alloy rod was cemented on the bovine dentin surface with a 20 μm-thick cement layer. The longitudinal bond strength from initial setting up to 24 hours was determined. A significant increase in the bond strength of the conventional cement was observed from 10 min to 20 min at all the mixing ratios. For all the mixing ratios the bond strength of the resin-modified cement increased with time. Slight differences in the bond strength were seen between the two different types of glass ionomer cement. In the initial setting, changes in the mixing ratios affected the bond strength of both cements.
