Bottom/top hardness ratio and dentin bonding stability of conventional and bulk-fill resin composites
Braz. j. oral sci
;
22: e237617, Jan.-Dec. 2023. ilus
Artículo
en Inglés
| LILACS, BBO
| ID: biblio-1435226
ABSTRACT
Aim:
To evaluate the bottom/top hardness ratio (B/T) and the dentin bonding stability of conventional and bulk-fill resin composites in high c-factor preparations.Methods:
Regular conventional (Tetric N-Ceram TNC, and Polofil Supra PFS), regular bulk-fill (Tetric N-Ceram Bulk fill TBF, and Admira Fusion X-tra AFX), and low viscosity bulk-fill resin composites (Tetric N-flow TNF, and X-tra Base XTB) were used to restore 180 dentin conical preparations. The specimens were randomly distributed in 12 groups (n = 15) according to the resin composites and storage time-points (24 h and six months) tested. After 24 h storage, all specimens were subjected to the bottom/top hardness ratio analysis. Then, the push-out bond strength test was performed in half of the specimens and the other half were maintained for six months on water storage before testing. The failure modes were analyzed in a stereomicroscopic. The data were analyzed statistically using one- and two-way ANOVA and Tukey post-test (p <0.05).Results:
There were no statistically significant differences for the bottom/top hardness ratio among the resin composites (p>0.05). Regardless of the storage timepoint, regular bulk-fill resin composites showed the highest bond strength values statistically (p<0.05). Only conventional resin composites showed statistically lower bond strength values at six-month storage (p<0.05). Adhesive failures were more predominant for low-viscosity bulk-fill resin composites.Conclusion:
Although the DoC was not affected by different materials tested, only bulk-fill resin composites did not present dentin bond strength loss after six-month of water storageAsunto(s)
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Recubrimiento Dental Adhesivo
/
Resinas Compuestas
/
Materiales Dentales
/
Longevidad
Idioma:
Inglés
Revista:
Braz. j. oral sci
Asunto de la revista:
Odontología
Año:
2023
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Federal University of Rio Grande do Norte/BR
/
Universidade Federal do Rio Grande do Norte/BR
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