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- Title
Does the hybrid light source (LED/laser) influence temperature variation on the enamel surface during 35% hydrogen peroxide bleaching? A randomized clinical trial.
- Authors
Moreira de Freitas, Patricia; Menezes, Andressa Nery; Costa da Mota, Ana Carolina; Simões, Alyne; Medeiros Mendes, Fausto; Neves Lago, Andrea Dias; Soares Ferreira, Leila; Ramos-Oliveira, Thayanne Monteiro
- Abstract
Objective: The present study investigated how a hybrid light source (LED/laser) influences temperature variation on the enamel surfaces during 35% hydrogen peroxide (HP) bleaching. Effects on the whitening effectiveness and tooth sensitivity were analyzed. Method and Materials: Twenty-two volunteers were randomly assigned to two different treatments in a split-mouth experimental model: group 1 (control), 35% HP; group 2 (experimental), 35% HP + LED/laser. Color evaluation was performed before treatment, and 7 and 14 days after completion of bleaching, using a color shade scale. Tooth sensitivity was assessed using a visual analog scale (VAS; before, immediately, and 24 hours after bleaching). During the bleaching treatment, thermocouple channels positioned on the tooth surfaces recorded the temperature. Data on color and temperature changes were subjected to statistical analysis (α = 5%). Tooth sensitivity data were evaluated descriptively. Results: Groups 1 and 2 showed mean temperatures (± standard deviation) of 30.7 ± 1.2°C and 34.1 ± 1.3°C, respectively. It was found that there were statistically significant differences between the groups, with group 2 showing higher mean variation [P < .0001). The highest temperature variation occurred for group 2, with an increase of 5.3°C at the enamel surface. The color change results showed no differences in bleaching between the two treatment groups (P = .177). The variation of the average temperature during the treatments was not statistically associated with color variation (P = .079). Immediately after bleaching, it was found that 36.4% of the subjects in group 2 had mild to moderate sensitivity. In group 1, 45.5% showed moderate sensitivity. In both groups, the sensitivity ceased within 24 hours. Conclusion: Hybrid light source (LED/laser) influences temperature variation on the enamel surface during 35% HP bleaching and is not related to greater tooth sensitivity.
- Subjects
BRAZIL; HYDROGEN peroxide; DENTAL enamel; TOOTH whitening; TOOTH sensitivity; COLOR; LASERS; LIGHT; TEMPERATURE; RANDOMIZED controlled trials; VISUAL analog scale; TREATMENT effectiveness; DATA analysis software; NULL hypothesis; PHYSIOLOGY
- Publication
Quintessence International, 2016, Vol 47, Issue 1, p61
- ISSN
0033-6572
- Publication type
Article
- DOI
10.3290/j.qi.a34454