Influence of toothpastes containing tricalcium phosphate on dental enamel microhardness, color, and topography
DOI:
https://doi.org/10.33448/rsd-v11i14.36410Keywords:
Hydrogen peroxide; Dental enamel; Tooth bleaching; Carbamide Peroxide; Dentifrices.Abstract
The aim of this study was to evaluate the effect of using dentifrices containing tricalcium phosphate (β-TCP) on microhardness, enamel color, and topography before bleaching treatment with 35% hydrogen peroxide (HP). Fifty bovine incisor enamel/dentin blocks (4 × 4 × 2 mm) were randomized into five groups (n=10): (C) negative control (no treatment), positive control (35% HP), Colgate Total 12 then 35% HP (CT 12 + 35% HP), Elmex Sensitive then 35% HP (ES + 35% HP), and Bianco Pro Clinical then 35% HP (BPC + 35% HP). Knoop microhardness (KHN) and scanning electron microscopy (SEM) were performed. The color was evaluated using CIELAB (∆Eab*) and CIEDE 2000 (∆E00) in 3 times: initial time (T0), 24 hours after exposure to dentifrice (T1), and 24 hours after bleaching treatment (T2). Data for microhardness, ∆Eab*, and ∆E00 data were analyzed using generalized linear models, considering the model’s group effect. The ∆L, ∆a, and ∆b data were analyzed using Kruskal–Wallis and Dunn’s nonparametric tests. A significance of 5% was used. KHN was significantly higher in the BPC + 35% HP and ES + 35% HP groups than in the C and 35% HP groups (p=0.0295). ∆L was greater in the groups that received 35% HP than in the C group 24 hours after bleaching (p=0.0001). There was no significant difference between groups in ∆Eab* (p=0.0679) and ∆E00 (p=0.1463) 24 hours after bleaching. Using dentifrices containing β-TCP before bleaching treatment with 35% HP increases enamel microhardness but does not significantly alter tooth color. Clinical Significance: Dentifrices containing β-TCP in their formulation increase enamel microhardness without interfering with substrate color when used with previous in-office tooth bleaching.
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Copyright (c) 2022 Marina Paparotto Lopes ; Iana Maria Costa Gonçalves; Raíssa Manoel Garcia; Danielle Ferreira Sobral-Souza; Flávio Henrique Baggio Aguiar; Débora Alves Nunes Leite Lima
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