Related Experiment Video
Updated: Jul 15, 2025
Adjunctive Diode Laser Therapy and Probiotic Lactobacillus Therapy in the Treatment of Periodontitis and Peri-Implant Disease
Published on: May 9, 2022
Randomized clinical trial comparing the violet light emitting diode system and other tooth whitening techniques
Alieny Cristina Duarte Ferreira1, Maria Helena Chaves de Vasconcelos Catão2
1Graduate Program in Dentistry, State University of Paraiba, Campina Grande, PB, Brazil.
Aim:
to evaluate, through a clinical trial, the effectiveness and sensitivity of tooth whitening techniques using violet light emitting diodes (LED), comparing with other whitening techniques.
Methodology:
75 patients were selected to undergo tooth whitening, randomly distributed into five different treatment groups: G1 (35% hydrogen peroxide), G2 (35% hydrogen peroxide + Green LED), G3 (35% hydrogen peroxide at 35% + Blue LED), G4 (35% hydrogen peroxide + Violet LED) and G5 (Violet LED). Sensitivity measurement was recorded using the Visual Analogue Scale (VAS) from 0 to 10; tooth color measurement was performed before (T0) and after 30 days of whitening treatment (T1) using Easyshade Advance 4.0 Vita-Wilcos® dental spectrophotometer. Statistical analysis was performed using the Fisher and Kruskal-Wallis exact test at significance level of p < 0.05.
Results:
the enamel whitening effect was observed in all groups, with significant changes in G1. With regard to sensitivity, no statistically significant differences were found between groups.
Conclusion:
In G5, no participant reported post-whitening sensitivity, suggesting that treatment with violet LED showed the best sensitivity outcomes, changing the enamel color one more tone on the color scale.
