ความแข็งแรงยึดระหว่างเดือยฟันสำเร็จรูปเสริมเส้นใยกับแกนฟันเรซินคอมพอสิตหลังการปรับสภาพพื้นผิวด้วยสารเคมี / สราลี อรรฆยะพิศุทธิ์ = Bond strength between prefabricated fiber-reinforced posts and resin composite core after chemical surface treatment
The objective of this study was to evaluate the effects of bond strength between prefabricated fiber-reinforced post and resin composite core after post surface treatments with different types and concentrations of chemical agents, and durations of the treatment. Eighty of both prefabricated glass adn quartz fiber-reinforced posts were included. (Easy Post® และ DT light Post®) Posts surface were treated by 4 % hydrofluoric acid at 15, 30 and 60 seconds, 30% and 35% hydrogen peroxide at 1, 2, 3, 4, 5 and 10 minutes, and 24% hydrogen peroxide at 10 minutes. The specimens were tested by push-out bond strength by universal testing machine and were measured the bond strength. The statistical analysis with one way ANOVA was performed on each group of the posts. Multiple comparisons of types and concentrations of chemical agents were completed with LSD (α=0.05). The result of this study showed the highest bond strength after treatment with 30% hydrogen peroxide for 5 and 10 minutes, in glass and quartz fiber groups, respectively (p<0.05). In conclusion, the appropriate type of chemical agent, concentration and duration of time for post surface treatment, which can enhance bond strength between resin composite and prefabricated glass and quartz fiber-reinforced post, is 30% hydrogen peroxide and 5 minutes, since this combination can increase bond strength while decrease clinical time.