Rubbing time and bonding performance of one-step adhesives to primary enamel and dentin
J. appl. oral sci
; 25(5): 523-532, Sept.-Oct. 2017. tab, graf
Artigo
em Inglês
| LILACS, BBO - Odontologia
| ID: biblio-893652
Biblioteca responsável:
BR1.1
ABSTRACT
Abstract Objectives:
This study investigated whether increasing the concentration of acidic monomers in one-step adhesives would allow reducing their application time without interfering with the bonding ability to primary enamel and dentin. Material andmethods:
Experimental one-step self-etch adhesives were formulated with 5 wt% (AD5), 20 wt% (AD20), or 35 wt% (AD35) acidic monomer. The adhesives were applied using rubbing motion for 5, 10, or 20 s. Bond strengths to primary enamel and dentin were tested under shear stress. A commercial etch-and-rinse adhesive (Single Bond 2; 3M ESPE) served as reference. Scanning electron microscopy was used to observe the morphology of bonded interfaces. Data were analysed at p<0.05.Results:
In enamel, AD35 had higher bond strength when rubbed for at least 10 s, while application for 5 s generated lower bond strength. In dentin, increased acidic monomer improved bonding only for 20 s rubbing time. The etch-and-rinse adhesive yielded higher bond strength to enamel and similar bonding to dentin as compared with the self-etch adhesives. The adhesive layer was thicker and more irregular for the etch-and-rinse material, with no appreciable differences among the self-etch systems.Conclusion:
Overall, increasing the acidic monomer concentration only led to an increase in bond strength to enamel when the rubbing time was at least 10 s. In dentin, despite the increase in bond strength with longer rubbing times, the results favoured the experimental adhesives compared to the conventional adhesive. Reduced rubbing time of self-etch adhesives should be avoided in the clinical setup.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
BBO - Odontologia
/
LILACS
Assunto principal:
Colagem Dentária
/
Adesivos Dentinários
/
Bis-Fenol A-Glicidil Metacrilato
/
Esmalte Dentário
/
Dentina
/
Metacrilatos
Tipo de estudo:
Estudo de avaliação
Limite:
Humanos
Idioma:
Inglês
Revista:
J. appl. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2017
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Norte do Paraná/BR