Antunes Edina Veloso Gonçalves, Basting Rosanna Tarkany, do Amaral Flávia Lucisano Botelho, França Fabiana Mantovani Gomes, Turssi Cecilia Pedroso, Kantovitz Kamila Rosamilia, Bronze-Uhle Erika Soares, Filho Paulo Noronha Lisboa, Basting Roberta Tarkany
Faculdade São Leopoldo Mandic, Rua José Rocha Junqueira 13, Bairro Swift, Campinas, São Paulo, CEP: 13045-755, Brazil.
School of Sciences, São Paulo State University (UNESP), Av. Eng. Luís Edmundo Carrijo Coube, 2085, Nucleo Res. Pres. Geisel, Bauru, São Paulo, CEP: 17033-360, Brazil.
Clin Oral Investig. 2023 Apr;27(4):1745-1755. doi: 10.1007/s00784-022-04802-5. Epub 2022 Nov 28.
The effects of different concentrations of titanium dioxide (TiO) into 40% hydrogen peroxide (HP) were evaluated as regards the effectiveness of dental color change either associated with activation by polywave LED light or not.
TiO (0, 1, 5, or 10%) was incorporated into HP to be applied during in-office bleaching (3 sessions/40 min each). Polywave LED light (Valo Corded/Ultradent) was applied or not in activation cycles of 15 s (total time of 2 min). The color of 80 third molars separated into groups according to TiO concentration and light activation (n = 10) was evaluated at baseline and at time intervals after the 1st, 2nd, and 3rd bleaching sessions.
WI value was significantly higher when using HP with 5% TiO in the 2nd session than the values in the other groups (p < 0.05). After the 2nd and 3rd sessions, the ΔEab value was significantly higher when activated with light (p < 0.05) for all agents containing TiO or not. Zeta potential and pH of the agents were not modified by incorporating TiO at the different concentrations.
The 5% TiO in the bleaching agent could enhance tooth bleaching, even without light application. Association with polywave LED light potentiated the color change, irrespective of the presence of TiO in the bleaching gel.
HP with 5% TiO could lead to a greater tooth bleaching response in the 2nd clinical session, as well as the polywave light can enhance color change.
评估在40%过氧化氢（HP）中加入不同浓度二氧化钛（TiO）对牙齿变色效果的影响，无论是否采用多波LED光激活。
将TiO（0%、1%、5%或10%）加入HP中，用于诊室漂白（共3次，每次40分钟）。在15秒的激活周期（总时长2分钟）中使用或不使用多波LED光（Valo Corded/Ultradent）。将80颗第三磨牙根据TiO浓度和光激活情况分为不同组（每组n = 10），在基线以及第1、2、3次漂白疗程后的不同时间间隔评估牙齿颜色。
在第2次疗程中，使用含5%TiO的HP时，WI值显著高于其他组（p < 0.05）。在第2次和第3次疗程后，对于所有含或不含TiO的试剂，用光激活时ΔEab值显著更高（p < 0.05）。不同浓度TiO的加入未改变试剂的zeta电位和pH值。
漂白剂中5%的TiO即使在不使用光的情况下也能增强牙齿漂白效果。与多波LED光联合使用可增强颜色变化，无论漂白凝胶中是否存在TiO。
含5%TiO的HP在第2次临床疗程中可导致更大的牙齿漂白反应，多波LED光也可增强颜色变化。
