Bond strength of dual-cured resin cements to root canal dentin

Resumo

The bonding of dental posts to the root canal
walls depends on the resin cement. Objective: This in vitro
study assessed the bond strength of resin cements used for post
cementation to different root regions. Material and methods:
Thirty canine roots were endodontically treated and prepared to
receive dental posts which were luted with different resin cements
(n = 10): Enforce (Dentsply), Panavia F (Kuraray Dental Co) and
RelyX ARC (3M ESPE). The cements were light-cured for 20 s.
After cementation, slices from cervical, middle and apical post/root
regions were submitted to the push out test in a universal testing
machine. The data (MPa) were analyzed using ANOVA and Tukey’s test
(a = 0.05). Results: RelyX ARC (3.24 ± 1.49) and Enforce (3.45 ± 1.42)
showed higher bond strength than Panavia (0.95 ± 0.39) (p < 0.05),
without statistically significant difference between each other
(p > 0.05). The bond strength values at the cervical (3.37 ± 1.47)
were higher than middle (2.62 ± 1.94) and apical (1.65 ± 0.99)
regions (p < 0.05), which were similar between them (p > 0.05).
Conclusion: The resin cements RelyX ARC and Enforce presented
greater bond strength than Panavia and the bond strength was
higher at the cervical region.