IADR Abstract Archives
Color Stability of Esthetic Restorative Materials
Objectives: The aim of this study was to assess the color stability of two microhybrid composite resins after immersion in different coloring solutions during 4 weeks.
Methods: 60 disc-shaped samples (2mm in thickness and 10mm in diameter) were prepared according to ISO standard 4049. Two composite resins were used; Filtek™ Z350 XT (3M ESPE) and Harvard Restore (Harvard Dental international Gmbh). After initial color measurements, 5 samples of each resin were immersed in artificial saliva, Turkish coffee, lemonade, black tea, Coca Cola zero% and green tea for 4 weeks. The spectrophotometric measurements were carried out after 24 hours of immersion in the various solutions and then weekly using a VITA Easyshade Advance 4.0 spectrophotometer (CIE L * a * b * system). Statistical analysis was carried out with SPSS 25.0 software.
Results: The two composite resins tested revealed discoloration after immersion in all drinks at variable immersion period showing different color behaviors. The one-way ANOVA showed a significant difference in the values of brightness (L), chromaticity from green to red (a), chromaticity from blue to yellow (b), and color (ΔE) of the two materials at different time intervals. The greatest color change in all groups was caused by coffee followed by lemonade and black tea followed by green tea, Coca-cola zero % and artificial saliva.
Conclusions: The Harvard Restore has shown a better colorimetric behavior compared to the Filtek®Z350. Coffee and teas had the most marked effects on the discoloration of composites, especially on Filtek®Z350. Coca-cola has shown a similar behavior to artificial saliva.
Methods: 60 disc-shaped samples (2mm in thickness and 10mm in diameter) were prepared according to ISO standard 4049. Two composite resins were used; Filtek™ Z350 XT (3M ESPE) and Harvard Restore (Harvard Dental international Gmbh). After initial color measurements, 5 samples of each resin were immersed in artificial saliva, Turkish coffee, lemonade, black tea, Coca Cola zero% and green tea for 4 weeks. The spectrophotometric measurements were carried out after 24 hours of immersion in the various solutions and then weekly using a VITA Easyshade Advance 4.0 spectrophotometer (CIE L * a * b * system). Statistical analysis was carried out with SPSS 25.0 software.
Results: The two composite resins tested revealed discoloration after immersion in all drinks at variable immersion period showing different color behaviors. The one-way ANOVA showed a significant difference in the values of brightness (L), chromaticity from green to red (a), chromaticity from blue to yellow (b), and color (ΔE) of the two materials at different time intervals. The greatest color change in all groups was caused by coffee followed by lemonade and black tea followed by green tea, Coca-cola zero % and artificial saliva.
Conclusions: The Harvard Restore has shown a better colorimetric behavior compared to the Filtek®Z350. Coffee and teas had the most marked effects on the discoloration of composites, especially on Filtek®Z350. Coca-cola has shown a similar behavior to artificial saliva.