Effect of Modelıng Liquid Use on Color and Whiteness Index Change of Composite Resins

Abstract

Objective: Composite resins are widely used in the restoration of teeth. The aim of this study is to examine the effect of modeling liquid use on the color and whiteness index changes of composite resins. Materials and Methods: In the study, samples were prepared using different composite resins (Clearfil Majesty Esthetic, Estelite Asteria, G-aenial A'Chord and Omnichroma). Before polymerization of the prepared samples, modeling liquid was applied to one group with a composite brush, while modeling liquid was not applied to the other group. After the polymerization process, the samples were polished using the finishing and polishing system (Clearfil Twist Dia). Color measurement of samples kept in coffee was measured at the beginning, at 7th and 30th days using spectrophotometer. CIEDE2000 (ΔE00) and whiteness index (WID) formulas were used to calculate color changes. Statistical analysis of the data was performed with one-way analysis of variance (ANOVA) and Tukey tests (p>0.05). Results: There was a statistically significant difference between the color and whiteness index change values of the composite resins on the 7th and 30th days (p<0.05). There was no statistically significant difference between the color and whiteness index change values of the composite resins with and without modeling liquid (p>0.05). The control group, which did not undergo finishing and polishing, showed the statistically highest color change (p>0.05). Conclusions: Composite resins showed change in color (ΔE00:1.8) and whiteness index (ΔWID:2.6) above the acceptable threshold value (AT) in coffee. The use of modeling liquid did not affect the color and whiteness index changes of the composite resins.

Keywords

• composite resin
• whiteness index
• modeling liquid
• color change