COLOR ACCURACY OF RESIN CEMENTS AND TRY-IN PASTES

The color accuracy of resin composite cements and their corresponding try-in pastes was assessed. Three shades of three brands were compared using the cements alone and in contact with a standard porcelain disk . There were significant differences in color between resin cements an d their corresponding try-in pastes. The addition of a 1-mm-thick porc elain disk greatly reduced the apparent color differences. The color o f resin cements changed over time, but not significantly. Baseline mea surements of resin cement colors were compared and measurements made a fter 24 hours of storage. Color changes were statistically significant but not perceptible, and all samples became slightly darker with age.