Vieira Isabele, Vieira-Junior Waldemir-Francisco, Pauli Maria-Cibelle, Theobaldo Jéssica-Dias, Aguiar Flávio-Henrique-Baggio, Lima Débora-Alves-Nunes-Leite, Leonardi Gislaine-Ricci
DDS student, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
DDS, MS, PhD, Professor, Department of Restorative Dentistry, São Leopoldo Mandic Institute and Dental Research Center, Campinas, São Paulo, Brazil.
J Clin Exp Dent. 2020 Feb 1;12(2):e116-e122. doi: 10.4317/jced.56006. eCollection 2020 Feb.
Commercial bleaching gels with remineralizing agents were developed to reduce the adverse effects of dental bleaching. The present study evaluated the effects on teeth of in-office bleaching gels containing 35-40% hydrogen peroxide (HP) with Calcium (Ca) or Fluoride (F).
Bovine enamel/dentin blocks (4x4x2.5 mm) were randomly divided into the following groups (n=12): no treatment (control); 35% HP (Whiteness HP, FGM); 35% HP with Ca (Whiteness HP Blue, FGM); 40% HP with F (Opalescence Boost, Ultradent). The specimens were analyzed for color (ΔL*, Δa*, Δb*, and ΔE), roughness (Ra), and Knoop microhardness (KHN). The color and KHN data were submitted to ANOVA and Tukey's test, while Ra values were analyzed using mixed models for repeated measures and Tukey-Kramer's test (α=0.05).
The bleached groups did not exhibit statistical differences among them for color. For roughness, 35% HP provided a slight increase of Ra, which was statistically different from the control. For microhardness, 35% HP and 40% HP with F presented KHN values that were statistically lower from the control, while the 35% HP with Ca did not statistically differ from the control.
The presence of Ca or F in bleaching gels did not interfere with bleaching efficacy. However, only the enamel exposed to the bleaching gel containing Ca obtained microhardness values similar to unbleached enamel. Hydrogen peroxide, tooth bleaching, tooth bleaching agents, laboratory research.
含再矿化剂的商用漂白凝胶旨在减少牙齿漂白的不良影响。本研究评估了含35 - 40%过氧化氢（HP）及钙（Ca）或氟（F）的诊室漂白凝胶对牙齿的影响。
牛牙釉质/牙本质块（4×4×2.5毫米）随机分为以下几组（n = 12）：未处理（对照组）；35% HP（美白HP，FGM）；含Ca的35% HP（美白HP蓝，FGM）；含F的40% HP（皓齿美白加速型，Ultradent）。对样本进行颜色（ΔL*、Δa*、Δb*和ΔE）、粗糙度（Ra）和努氏显微硬度（KHN）分析。颜色和KHN数据进行方差分析和Tukey检验，而Ra值采用重复测量混合模型和Tukey - Kramer检验进行分析（α = 0.05）。
漂白组之间在颜色上无统计学差异。对于粗糙度，35% HP使Ra略有增加，与对照组有统计学差异。对于显微硬度，35% HP和含F的40% HP的KHN值低于对照组且有统计学差异，而含Ca的35% HP与对照组无统计学差异。
漂白凝胶中Ca或F的存在不影响漂白效果。然而，只有暴露于含Ca漂白凝胶的牙釉质获得了与未漂白牙釉质相似的显微硬度值。过氧化氢、牙齿漂白、牙齿漂白剂、实验室研究。
