Chromatic Adaption of Two Universal Composites: Spectrophotometric Analysis

Area of Science:

• Dental Materials Science
• Restorative Dentistry
• Colorimetry

Background:

• Accurate color matching is crucial for aesthetic dental restorations.
• Composite resins are widely used for dental restorations, but their color stability can be a concern.
• Understanding the chromatic adaptability and color stability of different composite resins is essential for clinical success.

Purpose of the Study:

• To evaluate and compare the chromatic adaptability and color stability of Omnichroma and Estelite Bulk-Fill Flow composite resins.
• To assess color changes in Class V restorations made with these materials at different time points.

Main Methods:

• Class V cavities were prepared on human molars and restored with either Omnichroma or Estelite Bulk-Fill Flow.
• Color properties were measured using spectrophotometry at baseline, immediately after restoration, 24 hours, and after thermocycling.
• Statistical analysis (Student's t-test, Wilcoxon-Mann-Whitney, Kruskal-Wallis, Two-way ANOVA) was performed to compare color differences (ΔE) between and within material groups over time.

Main Results:

• No statistically significant differences in color change (ΔE) were found between Omnichroma and Estelite Bulk-Fill Flow at any time point (p > 0.05).
• Both materials demonstrated similar chromatic adaptability, with average ΔE values exceeding 2.
• Intra-group analysis revealed no significant color stability variations over time for either composite resin.

Conclusions:

• Both Omnichroma and Estelite Bulk-Fill Flow exhibit comparable in vitro color matching and stability in Class V restorations.
• The tested resin composites maintain their color over different time intervals, suggesting good color stability.
• Despite employing different color-generating mechanisms, the two composites demonstrate similar chromatic adaptability.