Evaluation of color stability of bulk-fill restorative materials with different properties

Year 2023, Volume: 6 Issue: 6, 1360 - 1365, 29.10.2023

Özge Çeliksöz , Hatice Tepe , Batucan Yaman

https://doi.org/10.32322/jhsm.1347899

Abstract

Aims: The present study aims to evaluate the color stability of bulk-fill restorative materials with different properties over different time periods when immersed in a coffee solution.
Methods: According to the selected restorative materials, the study groups were formed as follows: CNT/light (Alkasite, Cention N, Ivoclar Vivadent, light cure mode), CNT/self (Alkasite, Cention N, self cure mode) EQF (Glass hybrid restorative, Equia Forte HT, GC Corporation), AU (Single-shade bulk fill, Aura Bulk Fill, SDI), Z550 (Filtek Z550, 3M) (control group). A total of 50 samples (n=10) were prepared using standard molds (2mmx10mm). After finishing and polishing procedures, all samples were kept in distilled water at 37°C for 24 hours. The first color measurement (L*a*b ) was performed with Vita Easy Shade V (VITA Zahnfabrik). Samples were added to the coffee solution. Color was measured at times simulating 7 days, 1 month, 6 months and 1 year of clinical service. Color changes (ΔE1, ΔE2, ΔE3 and ΔE4) were calculated according to the CIE L*a*b system. Normality of the data was examined by D'Agostino & Pearson omnibus normality test. One-way ANOVA analysis and Tukey test were performed. Statistical significance level was set at p 0.05 and statistical analysis software (GraphPad Prism 6.0, GraphPad Software, USA) was used for the analysis.
Results: According to ΔE1 results; clinically unacceptable color change (ΔE>3.3) values were observed in CNT/light and CNT/self groups. The color change values of EQF, Z550 and AU groups were statistically similar (p>0.05). According to ΔE2 results; an unacceptable color change (ΔE>3.3) was observed in all groups except EQF. According to ΔE3 results; an unacceptable color change (ΔE>3.3) was observed in all groups. According to ΔE4 results; an unacceptable color change (ΔE>3.3) was observed in all groups. The color change values of EQF, Z550 and AU groups were statistically similar (p>0.05). CNT/light group showed the highest color change in all time periods, followed by CNT/self group.
Conclusion: The color stability of single-shade bulk fill material and glass hybrid restorative materials is similar to the control group. The color stability of alkasite material needs to be improved.

Keywords

Alkasite, Bulk fill, Cention N, Color Stability, Glass Hybrid

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