Restor Dent Endod.  2024 Aug;49(3):e30. 10.5395/rde.2024.49.e30.

Effect of surface sealant on the color stability and whiteness index of single-shade resin composites after staining and bleaching

• Fidan M
• Yağcı

• KMID: 2559743
• DOI: http://doi.org/10.5395/rde.2024.49.e30

Abstract

Objectives
The aim of the current study was to evaluate the effect of polishing systems and surface sealant on the color stability and whiteness index of single-shade resin composites after staining and bleaching.
Materials and Methods
Three single-shade (Omnichroma, Charisma Diamond One, Zenchroma) and one multi-shade (Filtek Z250) materials were tested. From each resin composite, 40 specimens were prepared. The specimens were divided into 4 subgroups (n = 10) according to the surface treatments: 1-step polishing, 1-step + Biscover LV, 2-step polishing, and 2-step polishing + Biscover LV. Color differences (ΔE₀₀ ) were calculated after being immersed in the coffee solution for 12 days. After the staining, the specimens were immersed in a whitening mouthrinse (Crest-3D White) for 12 hours. Whiteness index differences (∆WI_D = WI_D after staining − WI_D after bleaching) values were recorded. The generalized linear model was used for analysis (p < 0.05).
Results
The lowest and highest ΔE₀₀ values were found for Zenchroma and Charisma Diamond One respectively. Sealed groups indicated higher ΔE₀₀ values than nonsealed groups with significant differences (p = 0.008). The lowest and highest ΔWI_D values were found for Zenchroma and Charisma Diamond One respectively. Sealed groups indicated lower ΔWI_D values than nonsealed groups with significant differences (p = 0.022).
Conclusions
The use of surface sealant increased the discoloration and showed less whiteness change in resin materials. When the 1-step was compared with the 2-step polishing, the effects on the color stability and whiteness index values of the resin materials were similar.

Keyword

Color; Composite dental resin; Dentistry; Spectrophotometry

Figure

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  Figure 1 Flow chart of the study.

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  Figure 2 The mean variations of all groups of ΔE00 values.ΔE00, color differences; AT, acceptability threshold of 1.8 units.

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  Figure 3 The mean variations of all groups of ΔWID values.ΔWID, whiteness index variations; WAT, acceptability threshold of 2.60 units.

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