Effect of photochemical activation of hydrogen peroxide bleaching gel with and without TiO2 and different wavelengths

Authors

  • Taciana Marco Ferraz Caneppele São Paulo State University – UNESP
  • Carlos Rocha Gomes Torres ão Paulo State University – UNESP
  • Adriana Chung São Paulo State University – UNESP
  • Edson Hidenobu Goto São Paulo State University – UNESP
  • Soraya Consolin Lekevicius São Paulo State University – UNESP

DOI:

https://doi.org/10.20396/bjos.v9i3.8641831

Keywords:

Tooth bleaching, Hydrogen peroxide, Color

Abstract

Aim: To evaluate the effect of photochemical activation of hydrogen peroxide (H2 O2 ) 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% H2 O2 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 10 min, 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 Tukey’s 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.

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Author Biographies

Taciana Marco Ferraz Caneppele, São Paulo State University – UNESP

PhD student in Restorative Dentistry, Department of Restorative Dentistry, São José dos Campos Dental School, São Paulo State University – UNESP

Carlos Rocha Gomes Torres, ão Paulo State University – UNESP

PhD, Department of Restorative Dentistry, São José dos Campos Dental School, São Paulo State University – UNESP

Adriana Chung, São Paulo State University – UNESP

MsC student in Restorative Dentistry, Department of Restorative Dentistry, São José dos Campos Dental School, São Paulo State University – UNESP

Edson Hidenobu Goto, São Paulo State University – UNESP

DDS, Department of Restorative Dentistry, São José dos Campos Dental School, São Paulo State University – UNESP

Soraya Consolin Lekevicius, São Paulo State University – UNESP

DDS, Department of Restorative Dentistry, São José dos Campos Dental School, São Paulo State University – UNESP

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Published

2015-11-18

How to Cite

1.
Caneppele TMF, Torres CRG, Chung A, Goto EH, Lekevicius SC. Effect of photochemical activation of hydrogen peroxide bleaching gel with and without TiO2 and different wavelengths. Braz. J. Oral Sci. [Internet]. 2015Nov.18 [cited 2022Jan.22];9(3):393-7. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641831

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