Abstract
Aim:
To evaluate the bond strength of one etch-and-rinse adhesive system and
one resin-modified glass ionomer cement to sound and eroded enamel.
Materials and methods: Forty-eight bovine incisors were embedded in
acrylic resin and ground to obtain flat buccal enamel surfaces. Half of
the specimens were submitted to erosion challenge with pH-cycling model
(3x/cola drink for 7 days) to induce eroded enamel. After that, all
specimens were randomly assigned according to adhesive material:
etch-andrinse adhesive system (Adper Single Bond 2 - 3M ESPE, USA) or
resin-modified glass ionomer cement (Vitro Fil LC - DFL, Brazil). The
shear bond testing was performed after 24 hours water storage (0.5
mm/min). Shear bond strength means were analyzed by two-way ANOVA and
Tukey post hoc tests (p < 0.05). Results: Adper Single Bond 2 showed
the highest bond strength value to eroded enamel (p < 0.05), whereas
no difference was observed in sound enamel compared with Vitro Fil LC (p
> 0.05). Conclusion: Bond strength of etch-and-rinse adhesive system
increases in eroded enamel, while no difference is verified to
resin-modified glass ionomer cement. Clinical significance: Adhesive
materials may be used in eroded enamel without jeopardizing the bonding
quality; however it is preferable to use etch-and-rinse adhesive system.
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