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. 2017 Jul 6;8(3):26.
doi: 10.3390/jfb8030026.

Color Stability of New Esthetic Restorative Materials: A Spectrophotometric Analysis

Claudio Poggio  1 , Lodovico Vialba  2 , Anna Berardengo  3 , Ricaldone Federico  4 , Marco Colombo  5 , Riccardo Beltrami  6 , Andrea Scribante  7
Affiliations

Color Stability of New Esthetic Restorative Materials: A Spectrophotometric Analysis

Claudio Poggio et al. J Funct Biomater. .

Abstract

The aim of this in vitro study was to evaluate and compare the color stability of different esthetic restorative materials (one microfilled composite, one nanofilled composite, one nanoceramic composite, one microfilled hybrid composite, one microfilled hybrid composite, one nanohybrid Ormocer based composite and one supra-nano spherical hybrid composite) after exposure to different staining solutions (physiological saline, red wine, coffee). All materials were prepared and polymerized into silicon rings (2 mm × 6 mm × 8 mm) to obtain specimens identical in size. Thirty cylindrical specimens of each material were prepared. Specimens were immersed in staining solutions (physiological saline, coffee and red wine) over a 28-day test period. A colorimetric evaluation according to the CIE L*a*b* system was performed by a blind trained operator at 7, 14, 21, 28 days of the staining process. The Shapiro-Wilk test and ANOVA were applied to assess significant differences among restorative materials. A paired t-test was applied to test which CIE L*a*b* parameters significantly changed after immersion in staining solutions. All restorative materials showed significant color differences after immersion in coffee. Coffee caused a significant color change in all types of tested composite resins. Only Filtek Supreme XTE demonstrated a staining susceptibility to red wine; no other significant differences among the materials were demonstrated. Long-term exposure to some food dyes (coffee in particular) can significantly affect the color stability of modern esthetic restorative materials regardless of materials' different compositions.

Keywords: CIE Lab; color stability; esthetic restorative materials.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Evolution of the color variation for each material over the course of the study when immersed in control solution. 1 day (D0), 1 week (D1), 2 weeks (D2), 3 weeks (D3), 4 weeks (D4).
Figure 2
Figure 2
Evolution of the color variation for each material over the course of the study when immersed in wine. 1 day (D0), 1 week (D1), 2 weeks (D2), 3 weeks (D3), 4 weeks (D4).
Figure 3
Figure 3
Evolution of the color variation for each material over the course of the study when immersed in coffee. 1 day (D0), 1 week (D1), 2 weeks (D2), 3 weeks (D3), 4 weeks (D4).
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