Effect of photochemical activation of hydrogen peroxide bleaching gel with and without TiO 2 and different wavelengths
Braz. j. oral sci
;
9(3): 393-397, July-Sept. 2010. ilus, tab
Artigo
em Inglês
| LILACS, BBO
| ID: lil-578062
ABSTRACT
Aim:
To evaluate the effect of photochemical activation of hydrogen peroxide (H2O2) bleaching gel with different wavelengths.Methods:
In the study, 80 bovine incisors were used, which were stained in 25% soluble coffee and divided in 4 groups. The initial color was measured with the Easy Shade spectrophotometer by CIE Lab. An experimental 35% H2O2 bleaching gel was used,either with or without the presence of titanium dioxide (TiO2) pigment, associated with two light sources G1 - Transparent Gel (TG) and no activation; G2 - Gel with TiO2 and activation with blue LED (l=470nm)laser (Easy Bleach) appliance; G3 - Gel with TiO2 and activation with ultraviolet(l=345nm - UV); G4 - TG and activation with UV. Three applications of the gels were made for 10min, and in each, 3 activations of 3 min, with interval of 30 s between them. The coloration was evaluated again and the variation in color perception (DE) was calculated. The data were submitted to one-way ANOVA and Tukeys test at 5% significance level.Results:
There were significant differences between G1 and G4. The greatest E value was observed in G4 (13.37).There was no statistically significant difference (p>0.05) between the groups 2, 3 and 4.Conclusions:
The presence of TiO2 particules in the bleaching gel did not interfere at the bleaching results.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Titânio
/
Clareamento Dental
/
Técnicas In Vitro
/
Corantes
/
Peróxido de Hidrogênio
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
São Paulo State University/BR
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