Abstract
Objectives: This clinical trial aimed to evaluate dental color stabilization after different bleaching techniques. Methods: Four dental bleaching techniques were tested in 60 healthy volunteers aged from 25 to 35 years randomly assigned to four groups. Group 1 (G1): conventional in-office bleaching using 35% hydrogen peroxide. Group 2 (G2): in-office application of 3% hydrogen peroxide followed by in-office bleaching using 35% hy- drogen peroxide. Group 3 (G3): in-office application of 3% hydrogen peroxide and activation with a light emitting diode (LED) lamp. Group 4 (G4): at-home bleaching using 10% carbamide peroxide. The color of canines and incisors was scored using a digital spectrophotometer to analyze lightness, chroma and hue. Results: All groups resulted in shade change. Lightness increased in all groups with no statistical difference among groups 60 days after finishing the treatment regardless of the technique used (p > 0.05). Differences were found in a short-term evaluation between some groups (p < 0.05). Chroma showed no statistical differ- ences for central incisors after bleaching (p > 0.05). Analyzing canines, G4 showed higher chroma compared to G1 (p < 0.05) and G2 (p < 0.05). For hue, only G2 behaved differently for canines and incisors (p < 0.05). In other groups, hue scores decreased after bleaching.
Conclusions: All techniques improved lightness. The addition of 3% hydrogen peroxide to conventional in-office whitening only increased appointment time, but no further benefits were noticed. Clinical relevance: This study is important to help clinicians deciding which is the most suitable dental bleaching for each patient in the current high aesthetic demanding world.
Recommended Citation
Barcessat AR, Gurgel NC, Wetter NU. Vital tooth bleaching using different techniques: A clinical evaluation. Future Dental Journal. 2020; 5(2).