Capacity of Monochromatic Composite Resins to Play a Mimetic Role for Substrates With Different Shades

This study aimed to evaluate the mimicry potential of four monochromatic composite resins: Vittra APS Unique; Charisma Diamond One; Aura Bulk Fill and Palfique Omnichroma. Resins were tested on different substrate colors (A1, A2 and A3) and depths (1, 2 and 4 mm). The color was measured with a spectrophotometer and the ΔE calculated by the CIEDE 2000 system, as well as the color correspondence with the Vita Classical and 3D Master scales. The difference in color between the samples was verified using the two-way ANOVA test (resin and cavity depth), adopting a significance level of 5%. The Aura Bulk Fill resin statistically showed the lowest color variation in all groups, except for the A1 4mm group, in which the Charisma Diamond One and Palfique Omnichorma resins showed similar values. Meanwhile, the Vittra APS Unique resin statistically showed the greatest color variation in all groups, except for the A2 2mm group, in which it showed similar values to the Palfique Omnichroma resin. The evaluated composite resins better mimic lighter substrates and in shallower cavities. In a comparative analysis between the different commercial brands studied, it can be considered that the Aura Bulk Fill composite resin presented results significantly superior to the other materials, while the Vittra APS Unique presented statistically inferior results and the Charisma Diamond One and Palfique Omnichroma resins presented results similar to each other.