Effect of bleaching on the color match of single-shade resin composites

Abstract

Purpose: To evaluate the color match of single-shade resin composites before and after bleaching procedures, through instrumental and visual analyses. Methods: Class V cavities were created on the buccal surfaces of 80 extracted human molars, restored with 4 single-shade composites (Omnichroma; Clearfil Majesty ES-2 Universal; Essentia Universal; Venus Diamond One). A spectrophotometer (VITA Easyshade V) was used to evaluate the tooth/resin color match before (T 0 ), and 24 h (T 1 ) and one week (T 2 ) after dental bleaching (Opalescence Boost PF 40%). Color variations (ΔE 00 ) were calculated and statistically analyzed (P < 0.05). Visual analysis was performed before and after tooth bleaching. Results: Spectrophotometric evaluations revealed statistically significant differences between materials at T 0 , T 1 , and T 2 (P < 0.05). Visual analysis reported excellent and very good grades (0 and 1, respectively), irrespective of the materials and timepoints. Conclusion: Data seem to indicate that single shade composites are able to shift their color when the surrounding tooth undergoes bleaching effects. Single-shade composites seem to achieve a good color match with the surrounding tooth structure, before and after professional bleaching.

Color match of single-shade restorations after professional dental bleaching: An in vitro study

“…[ 5 7 13 17 ] In a previous study, the color match between tooth and composite restorations was recorded using ΔE 00 formula. [ 8 ] These results are in line with those of the present article, highlighting the fact that regardless of the color analysis system used, the BE results of single shade composites are extremely performant from an esthetic point of view.…”

“…Venus and Essentia composites gave the best color match results after tooth bleaching procedures, but all the tested materials showed a good BE before and after professional bleaching. [ 8 ] Even if the color variation analysis system used is different from the one adopted in this manuscript (CIEDE2000 vs. CIELAB), it is curious to note how the tendency of the 4 composites to change color following tooth bleaching is very comparable to that found in the present study.…”

“…Several previous studies have analyzed the behavior of single-shade resin composites in comparison with traditional materials, but only a few of them have also evaluated the effect of bleaching treatments. [ 8 12 13 14 ]…”

“…Teeth were free of restorations, decays, and endodontic treatment. Following a previously published research protocol,[ 8 ] teeth were randomly divided into 4 groups, 20 teeth in each group ( n = 20), and were stored in distilled H 2 O at 37°C in single sealable compartments for 24 h.[ 16 17 ]…”

“…[ 6 ] These new composites seem to be very effective in reducing in-chair clinical timing by minimizing the time spent on shade selection. [ 7 8 ]…”