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Color Matching Ability of a Single-Shade or Multi-Shade Composite Used for Lithium Disilicate Restoration Repair:
Fatemeh Pournaghi Azar1, Haleh Valizadeh-Haghi2, Safa Valizadeh-Haghi3
1Department of Restorative Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran, tbzmed.ac.ir.
Introduction:
In recent years, single-shade composites have attracted considerable attention due to simplification of the shade selection process. This study aimed to evaluate the color matching ability of a single-shade composite with different shades of lithium disilicate ceramic.
Materials And Methods:
In this in vitro study, 66 specimens were evaluated in six groups. Lithium disilicate ceramic discs in three shades (A1, A2, and A3) were fabricated with a central cavity and, depending on the group, filled with either a single-shade composite (Essentia, GC) or a multi-shade composite (Estellite Sigma Quick). Three solid ceramic discs with identical dimensions were prepared for each shade and served as color reference specimens. Color measurements were performed at the center of the discs using a spectrophotometer over black and white backgrounds, and color differences (ΔE 00) were calculated relative to the reference specimens. Data were analyzed using three-way ANOVA. Subgroup comparisons were performed using one-way ANOVA followed by Tukey's HSD post hoc test. The level of significance was set at 5%.
Results:
Three-way ANOVA demonstrated significant effects of ceramic shade and background color on color-matching ability (p < 0.001). Significant interactions were observed among composite type, ceramic shade, and background condition (p < 0.001). The single-shade composite demonstrated superior color matching with A3 ceramics under both background conditions, whereas the multi-shade composite showed better performance with A1 ceramics.
Conclusion:
The color-matching ability of repair composites was significantly influenced by the interaction among composite type, ceramic shade, and background color.
