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
Artículo
en Inglés
| LILACS, BBO
| ID: biblio-893652
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:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Recubrimiento Dental Adhesivo
/
Recubrimientos Dentinarios
/
Bisfenol A Glicidil Metacrilato
/
Esmalte Dental
/
Dentina
/
Metacrilatos
Tipo de estudio:
Estudios de evaluación
Límite:
Humanos
Idioma:
Inglés
Revista:
J. appl. oral sci
Asunto de la revista:
Odontología
Año:
2017
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Norte do Paraná/BR
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