Publicação: Microstructural effect of a laser-activated bleaching agent containing titanium dioxide on human enamel
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2020-11-01
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Coorientador
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Aim: This study aimed to evaluate the effect of a laser-activated bleaching agent containing titanium dioxide (TiO2) nanoparticles on enamel roughness and hardness. Materials and Methods: Twenty human premolars were randomized into two groups according to the bleaching treatments performed: HP-35% hydrogen peroxide and HP + TiO2-30% hydrogen peroxide containing TiO2 light-activated by diode laser (980 nm). It was performed two bleaching sessions with an interval of 7 days. Microhardness and roughness of the enamel were assessed at three times: T0-Before 1st appointment, T1-after 2nd appointment, and T2-7 days after 2nd appointment. Results: The HP + TiO2 did not cause changes on enamel roughness and hardness and presented the same effects of the HP. Conclusions: Both bleaching agents showed no difference between them. Then, it is possible to conclude that both are viable for clinical use during in-office dental bleaching technique regarding the microstructural changes that they might cause.
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Inglês
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Journal of Conservative Dentistry, v. 23, n. 6, p. 558-562, 2020.
