Effectiveness of 6% hydrogen peroxide concentration for tooth bleaching—A double-blind, randomized clinical trial

New Trends on In-office Tooth Bleaching

“…These results agree with Martin et al who describe a change of 5 delta E tones with 6% gel in the office [4], but with different application protocols: 1) 3 sessions with 2 applications, each for twelve; 2) 2 sessions with 3 applications for 12 minutes, and3) 2 sessions with 1 application of 36 minutes. All of these approaches are equally effective.…”

“…Regarding the effect on the aesthetic perception and psychosocial impact, there are some reports of Martin et al [4] and Fernandez et al [24] showing a positive effect on these two areas, topics that you should be much more investigation in the future.…”

“…The smile is the first thing people see when they meet a person, it's part of the first impression, thereby any alteration in the shape and/or color has a negative impact on the person self-esteem, even affecting their psychological and social behavior [3]. Within the characteristics of the smile, the tooth color is far the most important factor, determining the satisfaction with the dental appearance [4].…”

“…More recently, the incorporation of titanium dioxide nanoparticles doped with nitrogen (TiO_N), as semiconductor agents, to bleaching agents with lower concentration of hydrogen peroxide (3.5-15%) have been introduced [4,24,25]. The TiO_N nanoparticles, when activated by a light source, can catalyze the hydrogen peroxide oxidation reaction, allowing reduction of agent concentration.Also the chemical reaction would be maintained at a more superficial level, reducing the hydrogen peroxide penetration towards the pulp-dentin complex.…”

“…Bortolatto et al reported greater efficacy and a reduction of 52% in the occurrence of tooth sensitivity when the bleaching agent of 15% hydrogen peroxide containing TiO_N was used compared to 35% hydrogen peroxide [20]. More recently, a bleaching agent with concentration even lower, 6% hydrogen peroxide containing TiO_N nanoparticles, has been studied [4,31,32]. Martin et al (23) evaluated the efficacy of this new bleaching agent with 6% of hydrogen peroxide containing TiO_N [24].…”