Color Stability of Bulk-fill Resins Immersed in Chicha: .

OBJECTIVE

To analyze the color stability of Bulk-fill resins immersed in chicha morada and light-cured at different distances (0 mm, 2 mm and 4 mm).

METHODS

This experimental study included a total of 216 Bulk-fill resin discs. The specimens were distributed into nine groups of 24 discs based on the type of resin (3M ESPE Filtek™ Bulk Fill, Ivoclar Tetric N-Ceram Bulk Fill and FGM Opus Bulk-fill APS), light-curing distances (0, 2 and 4 mm) and staining solution (control with distilled water and Naturalle chicha morada). Color measurements were taken 24 hours after fabrication and immersion in distilled water and Naturalle chicha morada at 24 hours, 1 week and 3 weeks.

RESULTS

Light-curing distances affected the color stability of the resins with 3M ESPE and Ivoclar, exhibiting significant color changes at all evaluated time points when immersed in chicha morada. For the Delta (ΔE) value 3M ESPE and Ivoclar resin discs immersed in chicha morada showed significant changes at 24 hours 1 week and 3 weeks (p = .001, p = .000 and p = .000; and p = .000 p = .000 and p = .000 respectively). However, FGM resin discs exhibited significant changes only at 24 hours and 1 week (p = .000 and p = .001). FGM showed better color stability compared to 3M ESPE and Ivoclar at 3 weeks of immersion in chicha morada. All three commercial brands showed a significant decrease in the "L" value as immersion time in chicha morada increased.

CONCLUSIONS

The study concluded that FGM demonstrated better chromatic stability over time compared to 3M ESPE and Ivoclar Ceram, which exhibited significant color changes influenced by immersion duration and photopolymerization distance.