Evaluation of dental enamel microproperties after bleaching with 35% hydrogen peroxide and different light sources: an in vitro study
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Ferreira, A. [1] ; Batista, A. [1] ; Neto, JA. [1] ; Simões, T. [1] ; da Silva, MG. [1] ; de Barros, D. [1] ; Catão, JS. [2] ; de Oliveira, T. [1] ; Catão, MV. [1]
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[1] Universidade Estadual da Paraíba
Universidade Estadual da Paraíba
Brasil
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[2] Dentistry undergraduates from the Integrated Faculty of Patos, Brazil
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- Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 13, Nº. 10 (October), 2021, págs. 969-974
- Idioma: inglés
- Enlaces
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Resumen
Background: To evaluate the tooth enamel surface morphology after the action of 35% hydrogen peroxide with and without LED activation.
Material and Methods: 70 bovine incisors with an enamel surface of 4x4x3 mm were used, prepared for reading superficial microhardness and roughness. Specimens were randomly distributed and divided into 7 experimental groups (n = 10); G1 = artificial saliva; G2 = 35% HP - 2 sessions (3x15´); G3 = Phosphoric Acid + 35% HP - 3 sessions (3x15´); G4 = 35% HP - 2 sessions (3x15´) + blue LED; G5 = 35% HP - 2 sessions (3x15´) + green LED;
G6 = 35% HP - 2 sessions (3x20´) + violet LED; G7 = Violet LED - 2 sessions (3x20´). The results were analyzed by the Anova, Wilcoxon, Dunnett and Tukey tests (α = 0.05).
Results: The G4 group showed a greater change in microhardness. Regarding roughness, the biggest mean difference between groups occurred in G2, G5 and G7. Optical microscopy showed a smooth enamel surface in groups G2, G5 and G7.
Conclusions: changes in the enamel surface were observed in relation to microhardness, but without significant changes in roughness, where the LED (green and violet) resulted in a smooth surface.
