Evaluation of Color Stability of Monochromatic Resin Composite Restorations After Repair Procedure

Backgrounds: The aim of the study was to evaluate the color stability after the repair procedure with current single-shade resin composites. Methods: Two different monochromatic resin composites, Omnichroma and ZenChroma, were used as repair materials. The samples were immersed in coffee, rosehip tea and distilled water, and color changes (ΔE00) were observed over 30 days. Results: The results showed no significant color change in distilled water, but both composites exhibited significant color changes in coffee and rosehip tea. Coffee caused the highest color change, especially in Omnichroma. Lower color change was observed in the repair groups of Omnichroma and ZenChroma compared to the control material. Conclusion: These findings suggest that repairing restorations may be advantageous, particularly in terms of aesthetic concerns. Key words: coffee, color, composite resin, dental restoration repair