Use of an applicator brush with high concentration bleaching gels.

Autor: Bernardi LG; Department of Restorative Dentistry, Dental Post-Graduate Program, State University of Ponta Grossa, Rua Carlos Cavalcanti, Bloco M - Uvaranas, Ponta Grossa, Parana, 4748, Brazil., Favoreto MW; Department of Restorative Dentistry, Dental Post-Graduate Program, State University of Ponta Grossa, Rua Carlos Cavalcanti, Bloco M - Uvaranas, Ponta Grossa, Parana, 4748, Brazil., Carneiro TS; Department of Restorative Dentistry, Dental Post-Graduate Program, State University of Ponta Grossa, Rua Carlos Cavalcanti, Bloco M - Uvaranas, Ponta Grossa, Parana, 4748, Brazil., Mena-Serrano A; Department of Dentistry, Universidad de Las Américas, Quito, Ecuador., Borges CPF; Department of Chemistry, State University of Ponta Grossa, Parana, Brazil., Reis A; Department of Restorative Dentistry, Dental Post-Graduate Program, State University of Ponta Grossa, Rua Carlos Cavalcanti, Bloco M - Uvaranas, Ponta Grossa, Parana, 4748, Brazil., Loguercio AD; Department of Restorative Dentistry, Dental Post-Graduate Program, State University of Ponta Grossa, Rua Carlos Cavalcanti, Bloco M - Uvaranas, Ponta Grossa, Parana, 4748, Brazil. aloguercio@hotmail.com.
Jazyk: angličtina
Zdroj: Clinical oral investigations [Clin Oral Investig] 2022 Oct; Vol. 26 (10), pp. 6387-6395. Date of Electronic Publication: 2022 Jul 01.
DOI: 10.1007/s00784-022-04594-8
Abstrakt: Objectives: To evaluate in vitro two high concentration self-mix bleaching gels (35% or 37.5%) with different application tips (with or without an applicator brush) during in-office bleaching.
Materials and Methods: Healthy premolars were randomly assigned to five groups (n = 8): no treatment; 35% HP without applicator brush, 35% HP with applicator brush, 37.5% HP without applicator brush, and 37.5% HP with applicator brush. After the procedures, the concentration of HP transferred into the pulp chamber was evaluated using UV-Vis. The amount of gel used in each group was measured on a precision analytical balance. Color change (ΔE ab , ΔE 00 , and ΔWI D ) was evaluated with a digital spectrophotometer. Initial concentration was measured by titration with potassium permanganate. The pH was evaluated using a digital pH meter. The data from each test were submitted to nonparametric tests (α = 0.05).
Results: Using a tip with an applicator brush expended less gel and left a lower amount of HP inside the pulp chamber compared to the tip without a brush for both bleaching gels (p < 0.0003), although no significant difference in color change was observed (p < 0.05). The 37.5% HP showed a more stable and less acidic pH and a lower amount of HP in the pulp chamber than the 35% HP (p < 0.00001).
Conclusion: The HP penetration into the pulp chamber was lower when using an applicator with a brush tip than when using one with a conventional tip. As for the color, both tips were considered to lighten teeth.
Clinical Significance: For the application of a self-mixing high concentration in-office bleaching gel, a brush tip should be recommended because its use diminishes the penetration of HP into the pulp chamber and wastes less bleaching gel.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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