用于诊室牙齿漂白的可见光激活二氧化钛光催化的体外评估
In vitro evaluation of visible light-activated titanium dioxide photocatalysis for in-office dental bleaching.
作者信息
Cuppini Marla, Leitune Vicente Castelo Branco, Souza Marcela de, Alves Annelise Kopp, Samuel Susana Maria Werner, Collares Fabrício Mezzomo
机构信息
Department of Conservative Dentistry, Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul.
Department of Materials, Ceramic Materials Laboratory, School of Engineering, Universidade Federal do Rio Grande do Sul.
出版信息
Dent Mater J. 2019 Feb 8;38(1):68-74. doi: 10.4012/dmj.2017-199. Epub 2018 Nov 17.
The evaluation of the photocatalysis of visible light activated titanium dioxide employed in hydrogen peroxide (HO) was carried using seven HO solutions (3.5 and 35%) and/or methylene blue (MB), with or without light irradiation (LI); the absorbance of MB was the bleaching indicator. Color analysis was performed on bovine teeth (n=12) using two different concentrations of HO, 6 and 35% associated with titanium dioxide (TiO). Data were analyzed with one and two-way ANOVA, and significance level of p<0.05. Solutions containing MB, HO at 3.5 or 35%, and TiO, followed by LI, showed significant difference when compared with other groups. Greater MB reduction was found in 35% concentration. HO 35%+TiO gel showed no difference in comparison to control group. All groups for the color analysis assay showed ΔE higher than 3.3. In conclusion, TiO and HO association is a promisor alternative for reducing the clinical time of in-office dental bleaching.
使用七种过氧化氢（HO）溶液（3.5%和35%）和/或亚甲基蓝（MB），在有或无光照（LI）的情况下，对用于过氧化氢的可见光活化二氧化钛的光催化作用进行了评估；MB的吸光度作为漂白指标。使用两种不同浓度的HO（6%和35%）与二氧化钛（TiO₂）结合，对牛牙（n = 12）进行颜色分析。数据采用单因素和双因素方差分析，显著性水平为p<0.05。与其他组相比，含有MB、3.5%或35%的HO以及TiO₂且随后进行光照的溶液显示出显著差异。在35%浓度下发现MB的还原程度更高。35%的HO + TiO₂凝胶与对照组相比没有差异。所有用于颜色分析测定的组显示ΔE高于3.3。总之，TiO₂与HO结合是减少诊室牙齿美白临床时间的一种有前景的替代方法。
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