Martín, J.Ovies, N.Cisternas, P.Fernández, E. [UNESP]Oliveira Júnior, Osmir Batista de [UNESP]Andrade, M. F. de [UNESP]Moncada, G. [UNESP]Vildósola, P. [UNESP]2015-08-062015-08-062015Laser Physics, v. 25, n. 2, p. 025608-5, 2015.1555-6611http://hdl.handle.net/11449/125938The aim of this study was to compare the bleaching efficacy of 35% hydrogen peroxide and 15% hydrogen peroxide with nitrogen-doped titanium dioxide catalysed by an LED-laser hybrid light. We studied 70 patients randomized to two groups. Tooth shade and pulpal sensitivity were registered. Group 1: 15% hydrogen peroxide with nitrogen-doped titanium dioxide. Group 2: 35% hydrogen peroxide. Both groups were activated by an LED-laser light. No significant differences were seen in shade change immediately, one week or one month after treatment (p > 0.05). Differences were seen in pulpal sensitivity (p < 0.05). The use of an LED-laser hybrid light to activate 15% hydrogen peroxide gel with N_TiO2 permits decreasing the peroxide concentration with similar aesthetic results and less pulpal sensitivity than using 35% hydrogen peroxide for bleaching teeth.025608-5engLED-laser lightNitrogen-doped titanium dioxideTeeth bleachingPulpal sensitivityArtigo10.1088/1054-660x/25/2/025608Acesso restrito28976225094297590170241211219616