Evaluation of the effect of tea & coffee on color change of the resin composite tooth (Glamour) and resin acrylic tooth (Ideal dent)

In removable dentures, artificial teeth are a significant part of the overall esthetical outcome. In the maintenance of esthetical effects, the color stability of artificial tooth materials is one major factor. The purpose of this in vitro study was to evaluate the color stability of one resin composite teeth (Glamour)and one resin acrylic teeth (Ideal dent) in tea & coffee. This in vitro-experimental study was done on a sample with size of 36. all of the samples selected of the upper right santral; between them 18 teeth was the resin composite(Glamour) with size A13 and color A1 and 18 teeth was the re sin acrylic teeth (Ideal dent) with size I18and color A1. Sample were immersed in to two staining beverage as test groups (tea & coffee) and distilled water as control. Color measurements of teeth were performed by using spectrophotometer, before immersion, the initial color value of each tooth was recorded. Color change values were determined after 1 month. Color differences were characterized using the CIE lab color space.for evaluation color with clinical environment we use from NBS units. Statistically analyzes done with ANOVA test. In the Glamour mark, for all samples, there were statistically significant differences between the mean ∆ E values after 1 month but in Ideal dent mark there were not. Color differences with corresponding ∆E values than 3.3are acceptable and NBS values than 3 are acceptable in clinical dentistry in the current study the ∆E values of all groups did not exceed 3.3. In the Glamour mark, coffee was found the more chromomeric agent between solutions. but in Ideal dent mark we did not found any color changes.