Color Stability of Bleached Resin Based Hybrid CAD/CAM Restorative Materials: An in vitro Study

Year 2025, Volume: 15 Issue: 4, 891 - 896, 26.12.2025

Ersan Çelik , Caner Öztürk

https://doi.org/10.33808/clinexphealthsci.1661099

Abstract

Objective: The color stability of restorative materials is a major factor for the long-term success of a restoration. The aim of this study is to evaluate the color stability of bleached resin matrix ceramic block materials in coffee immersion.
Methods: Five different A2 shaded CAD/CAM resin matrix ceramic block materials (Lava Ultimate-LU, Shofu Blok HC- SHC, GC Cerasmart- GCER, Vita Enamic-VE, Brilliant Crios-BE) were used in this study (n:10). The color stability of the samples after different bleaching procedures (Opalescence BOOST and Opalescence PF) and coffee immersion were calculated using ∆E00 formula. The L*, a*, b* values were measured by using a spectrophotometer and data were analyzed by using Repeated-Measures ANOVA and ΔE00 values were evaluated Two-way ANOVA test at the significance level of p<0.05.
Results: After coffee immersion, the lowest L* value was seen in LU, GCER and SHC and, the highest values were observed in VE and BC. There was no significant change was observed in L value after bleaching (p>0.05), but after coffee immersion L* values significantly decreased (p<0.05). The color change after bleaching procedures was only within clinically acceptable limits in the home bleached LU and SHC samples, and the color change was below the perceptible thresholds in other groups.
Conclusion: The highest color change occurred in groups with high organic content. The ΔE00 values of SHC and LU were above clinically acceptable values, the values obtained from the other groups were within clinically acceptable limits after coffee immersion.

Keywords

Resin , Bleaching , Color

Ethical Statement

Ethics committee approval is not required since this research does not directly affect humans or animals.

Supporting Institution

None

Thanks

We would like to thank Marmara University for providing access to academic databases.

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