Physicochemical evaluation of hydrogen peroxide bleaching gels containing titanium dioxide catalytic agent, and their influence on dental color change associated with violet LED

•Violet LED potentiated the bleaching treatment at a lower hydrogen peroxide concentration.•The addition of TiO2 to the bleaching gels did not impact their physicochemical properties right after its incorporation.•TiO2-incorporated 7.5% hydrogen peroxide gel was more unstable than non-incorporated 3...

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Published in:Photodiagnosis and photodynamic therapy 2023-03, Vol.41, p.103254-103254, Article 103254
Main Authors: Carlos, Natália Russo, Basting, Rosanna Tarkany, Amaral, Flávia Lucisano Botelho do, França, Fabiana Mantovani Gomes, Turssi, Cecilia Pedroso, Kantovitz, Kamila Rosamilia, Bronze-Uhle, Erika Soares, Lisboa Filho, Paulo Noronha, Cavalli, Vanessa, Basting, Roberta Tarkany
Format: Article
Language:English
Subjects:
Animals
Bleaching
Cattle
Color
Gels
Hydrogen Peroxide
Hypochlorous Acid
Photochemotherapy - methods
Photosensitizing Agents
Titanium dioxide
Tooth Bleaching
Tooth Bleaching Agents - pharmacology
Violet LED
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Summary:•Violet LED potentiated the bleaching treatment at a lower hydrogen peroxide concentration.•The addition of TiO2 to the bleaching gels did not impact their physicochemical properties right after its incorporation.•TiO2-incorporated 7.5% hydrogen peroxide gel was more unstable than non-incorporated 35% hydrogen peroxide gel over time.•TiO2 did not increase the bleaching effectiveness of the bleaching agents. The purpose of this study was: 1) to analyze the physical-chemical properties of hydrogen peroxide (HP) agents at 7.5% (HP7) and 35% (HP35), and the association with or without TiO2 nanotubes; 2) to evaluate dental bleaching effectiveness by using HP7 and HP35 together with or without TiO2 nanotubes, and applied with or without violet LED (VL). Methodology: 80 bovine incisors were treated according to groups (n = 10): HP35; HP35 + VL; HP35T (HP35 + TiO2); HP35T + VL; HP7; HP7 + VL; HP7T (HP7 + TiO2); HP7T + VL. Bleaching effectiveness was measured at 4 time points according to the Vita Classical, CIEL*a*b*, CIEDE2000, and WID parameters. HP35, HP35T, HP7, and HP7T were evaluated for mass change, pH, mean particle size (P), polydispersity (PDI), and zeta potential (ZP), over 6 months of storage. The pH of HP35 thickener was higher when associated to TiO2. At baseline, both of the bleaching gels containing TiO2 had lower P, PDI, and PZ (p 
ISSN:1572-1000
1873-1597
DOI:10.1016/j.pdpdt.2022.103254