Effects of black tea tooth staining previously to 35% hydrogen peroxide bleaching
نویسندگان
چکیده
Aim: To determine if the artificial staining with black tea (BT) influences enamel microhardness before in-office bleaching and BT is necessary to evaluate efficacy of 35% hydrogen peroxide Methods: Enamel/dentin blocks were randomized into groups according protocol (n=5/group): (CO) control – maintained in saliva solution (AS); (BT4) immersed for 4 h; (BT24) 24 h. After protocols, all specimens kept AS one week, followed by (three sessions HP application 40 min). Knoop surface (kgF/mm2) was determined at baseline (T0), after (T1), 7 days storage (T2), (T3). The color (ΔE00) coordinate changes (ΔL, Δa, Δb) measured using a digital spectrophotometer T0 T3. Data submitted one-way (ΔE00, ΔL, or two-way ANOVA repeated measures Tukey’s test (a=5%). Results: protocols (BT4 BT24) promoted significantly lower (T1 T2, p<0.05) than CO, whereas CO only group maintain values over time. Bleaching perceptible ΔE00 without significant difference among regardless (p=0.122). BT4 showed no differences terms ΔL Δa (p>0.05), but displayed higher Δb CO. Conclusion: negatively affected not essential bleaching.
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ژورنال
عنوان ژورنال: Brazilian Journal of Oral Sciences
سال: 2022
ISSN: ['1677-3217', '1677-3225']
DOI: https://doi.org/10.20396/bjos.v22i00.8668082