Do dental bleaching sessions prior to orthodontic treatment change the bond strength of esthetic brackets?

Autor:	Perciano SG; Uniararas, Faculdade de Odontologia de Araras, Departamento de Ortodontia (Araras/SP, Brazil)., Carneiro DPA; Uniararas, Faculdade de Odontologia de Araras, Departamento de Ortodontia (Araras/SP, Brazil)., Santos PRD; Uniararas, Faculdade de Odontologia de Araras, Departamento de Ortodontia (Araras/SP, Brazil)., Correr AB; Universidade Estadual de Campinas, Departamento de Odontologia Restauradora, Divisão de Materiais Dentários (Piracicaba/SP, Brazil)., Vedovello SAS; Uniararas, Faculdade de Odontologia de Araras, Departamento de Ortodontia (Araras/SP, Brazil)., Valdrighi HC; Uniararas, Faculdade de Odontologia de Araras, Departamento de Ortodontia (Araras/SP, Brazil).
Jazyk:	angličtina
Zdroj:	Dental press journal of orthodontics [Dental Press J Orthod] 2021 Aug 27; Vol. 26 (4), pp. e2119124. Date of Electronic Publication: 2021 Aug 27 (Print Publication: 2021).
DOI:	10.1590/2177-6709.26.4.e2119124.oar
Abstrakt:	Objective: The aim of this experimental in vitro study was to evaluate whether dental bleaching performed before orthodontic treatment change the shear bond strength (SBS) of monocrystalline and polycrystalline esthetic brackets. Methods: Sixty (60) bovine incisors teeth were used and randomly divided into the following six groups (n=10): SCP (without bleaching/polycrystalline brackets); SCM (without bleaching/monocrystalline brackets); 1CP (one bleaching session/polycrystalline brackets); 1CM (one bleaching session/monocrystalline brackets); 3CP (three bleaching sessions/polycrystalline brackets); and 3CM (three bleaching sessions/monocrystalline brackets). The brackets were bonded seven days after the bleaching sessions. The samples were submitted to the SBS test in a universal testing machine (Instron model 4411) at 1 mm/min crosshead speed. The two-way analysis of variance (ANOVA) and the Tukey tests were performed at a 5% level of significance. After the mechanical test, samples were evaluated to determine the adhesive remnant index (ARI). Results: The SBS values were significantly higher for the monocrystalline brackets, when compared with the polycrystalline type (p< 0.0001), and significantly higher with three bleaching sessions than without bleaching (p< 0.0436). The ARI showed predominance of failures between the bracket and resin for all the groups (score 3). Conclusion: Three dental bleaching sessions increased the SBS values. Monocrystalline brackets showed higher SBS values than the polycrystalline type.
Databáze:	MEDLINE
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