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
Article
Dans En
| LILACS, BBO
| ID: biblio-1435226
Responsable en Bibliothèque :
BR218.1
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 storageSujets)
Texte intégral:
1
Indice:
LILACS
Sujet Principal:
Collage dentaire
/
Résines composites
/
Matériaux dentaires
/
Longévité
langue:
En
Texte intégral:
Braz. j. oral sci
Thème du journal:
ODONTOLOGIA
Année:
2023
Type:
Article