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23.02.2022 | Original Article

Strategy for reducing cytotoxicity and obtaining esthetic efficacy with 15 min of in-office dental bleaching

verfasst von: Uxua Ortecho-Zuta, Carla Caroline de Oliveira Duque, Rafael Antonio de Oliveira Ribeiro, Maria Luísa Leite, Diana Gabriela Soares, Josimeri Hebling, André Luiz Fraga Briso, Carlos Alberto de Souza Costa

Erschienen in: Clinical Oral Investigations | Ausgabe 5/2022

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Abstract

Objectives

Evaluate in vitro the esthetic efficacy and cytotoxicity of a bleaching gel containing 35% hydrogen peroxide (BG-35%H₂O₂), applied for different time intervals, on enamel coated or not with polymeric biomaterials.

Materials and methods

Nanofiber scaffolds (NSc) and a primer catalyst (PrCa) were used to coat the bovine enamel/dentin discs before the application of BG-35%H₂O₂, according to the following groups: G1—negative control (NC, without treatment); G2, G3, and G4—BG-35%H₂O₂ applied for 3 × 15, 2 × 15, and 15 min; G5, G6, and G7—BG-35%H₂O₂ applied on enamel coated with NSc and PrCa for 3 × 15; 2 × 15, and 15 min, respectively. The culture medium with components of gel diffused through the discs was applied on MDPC-23 cells, which were evaluated regarding to viability (VB), integrity of the membrane (IM), and oxidative stress (OxS). The quantity of H₂O₂ diffused and esthetic efficacy (ΔE/ΔWI) of the dental tissues were also analyzed (ANOVA/Tukey; p < 0.05).

Results

Only G7 was similar to G1 regarding VB (p > 0.05). The lowest value of H₂O₂ diffusion occurred in G4 and G7, where the cells exhibited the lowest OxS than G2 (p < 0.05). Despite G5 showing the greatest ΔE regarding other groups (p < 0.05), the esthetic efficacy observed in G7 was similar to G2 (p > 0.05). ΔWI indicated a greater bleaching effect for groups G5, G6, and G7 (p < 0.05).

Conclusion

Coating the dental enamel with polymeric biomaterials reduced the time and the cytotoxicity of BG-35%H₂O₂.

Clinical significance.

Coating the dental enamel with polymeric biomaterials allows safer and faster BG-35%H₂O₂ application.

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Titel: Strategy for reducing cytotoxicity and obtaining esthetic efficacy with 15 min of in-office dental bleaching
verfasst von: Uxua Ortecho-Zuta
Carla Caroline de Oliveira Duque
Rafael Antonio de Oliveira Ribeiro
Maria Luísa Leite
Diana Gabriela Soares
Josimeri Hebling
André Luiz Fraga Briso
Carlos Alberto de Souza Costa
Publikationsdatum: 23.02.2022
Verlag: Springer Berlin Heidelberg
Erschienen in: Clinical Oral Investigations / Ausgabe 5/2022
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-022-04379-z

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Abstract

Objectives

Materials and methods

Results

Conclusion

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