color stability of different denture teeth following immersion in staining solutions

Objectives: this study aimed to assess the color change (δe00) of 7 brands of denture teeth (conventional acrylic and composite teeth) following immersion in staining solutions. materials and methods: maxillary central incisor denture teeth made of 4 conventional acrylic resins (vitapan, sr vivodent pe, beta star and crystal) and 3 composite resins (finex, emeral and phonares ii) were randomly divided into four groups (n=5). denture teeth of different brands were immersed in tea, coffee, cola, and turmeric solutions. the solutions were incubated at 37°c. the baseline color of the teeth was measured using an intraoral spectrophotometer. the color of the teeth was measured after 24 h (δe12), 1 week (δe13), 2 weeks (δe14), and 1 month (δe15). δe00 was calculated and analyzed using one-way anova. pairwise comparisons were performed by the tukey’s post-hoc test (p<0.05). results: the color stability of all teeth was significantly affected by the solutions (p<0.001). the type of tooth and coloring solution had significant interactions at all times (p<0.05). turmeric caused the maximum color change in all teeth after 1 month. repeated measures anova showed that δe00 of all teeth was significantly affected by the duration of immersion in the solutions (p<0.001). conclusion: within the limitations of this study, 1-month immersion of denture teeth in coffee, tea and cola solution altered the δe values; however, they were within the acceptable range, except for beta star. turmeric solution caused unacceptable color change in all denture teeth even after 24 h of immersion.