Evaluation of the Color Stability of Newly Introduced Turkish Dental Composite Resin Products: An in Vitro Study

Objective This study aimed to evaluate the color stability of dental composites originating from Turkey by comparing Filtek Z550.
Method Four different solutions (Distilled water, tea, coffee, and cola) and four nanohybrid composites (Nova Compo C, RubyComp P, Astor Plus, and Filtek Z550 were used in the study. Composite specimens with a diameter of 8 mm and a thickness of 2 mm were produced using a cylindrical silicone mold. Both the top and bottom of the composites were cured with the B-Cure Plus curing light for 20 seconds. A total of 160 samples were obtained, 40 from each composite (n=10). The first shade measurement of the samples was carried out with a spectrophotometer device  according to the CIE L* a* b* shade system. Color measurements were carried out on the 1st, 3rd, and 7th days.
Results Nova Compo C, RubyComp P, and Filtek Z550 exhibited significantly higher color stability than Astor Plus (p0.05). Distilled water and Cola caused significantly lower discoloration than tea and coffee; however, no significant difference was found between distilled water and cola (p>0.05). Discoloration increased significantly from day 1 to day 3 and from day 3 to day 7 (p