THE COMPARISON OF COLOR STABILITY OF COMPOSITE RESINS AFTER IMMERSION IN DIFFERENT DRINKS

Purpose: the purpose of this study was to evaluate the color stability of different composite resins upon exposure to different drinks which were highly consumed in daily life. materials and methods: twenty-five disc-shaped (15×2 mm) cylindrical specimens were prepared for each of 6 different composite resins (filtek silorane, aelite aesthetic enamel, quixfill, ceram x mono, grandio, intens). the specimens of each composite resin groups were divided into 5 subgroups (n=5) for storage for 48 hours at 37°c in different types of solutions: water, coffee, tea, cola, and red wine. the color values of all groups were measured before and after exposure to different solutions with a colorimeter (minolta cr-300). data were recorded according to the cie l*a*b* system and then color changes (δe*) were calculated. the statistical analysis of the color variation data included a 2- way analysis of variance (anova) and the means were compared by tukey hsd test (α=.05). results: for the 6 restorative materials tested, the lowest δe* values were observed in the water immersed group (p<0.05). the highest color differences were observed in the red wine and coffee immersed groups(p<0.05). when comparing the restorative materials, aelite aesthetic enamel and filtek silorane demonstrated significantly showed less color change than the other composite groups (p<0.05). conclusions: discoloration of composite resins is based on the composition of the composite resins as well as the type of the drinks. silorane-based composite resins are resistant to external discoloration.