color stability of resin hybrid ceramic materials in comparison to zirconia-reinforced lithium silicate ceramic

Objectives: this in vitro study aimed to compare the effect of external staining agents (black tea and grape juice) on the color change of three hybrid ceramics including a new material in comparison to zirconia-reinforced lithium silicate.materials and methods: ten samples of two hybrid dental ceramics including vita enamic (vita zahnfabrik) and crystal ultra (digital dental) in addition to a resin nanoceramic, lava ultimate (3m espe); and a zirconia-reinforced lithium silicate glass ceramic, vita suprinity (vita zahnfabrik) were prepared and immersed in black tea or grape juice for 30 days. a spectrophotometer was used to evaluate color change. all samples were carefully chosen in a3 shades or their equivalent. two-way anova and bonferroni tests were used to analyze the color differences (δe00) among the materials and the staining solutions at a significant level of 0.05.results: significant color changes were observed in vita enamic and lava ultimate groups after immersion in both solutions (p<0.001). the least color changes (δe00) belonged to the vita suprinity (1.34) and crystal ultra (1.92) groups, respectively.conclusion: the color changes of vita enamic and lava ultimate materials were beyond clinical acceptability. however, the mean color changes of vita suprinity and crystal ultra groups were clinically acceptable.