Effect of Different Surface Treatments on Push-Out Bond Strength of Zirconia Oxide Posts

摘要

To investigate the effect of different surface treatments on push-out bond strength of zirconia oxide posts in root canals. Sixty single-rooted extracted teeth were collected and divided into two groups. Custom milled zirconium oxide posts (Cercon, DeguDent, Germany; Cosmopost, Ivoclar, Liechtenstein) were fabricated. Post specimens of each group were subjected to different surface treatments (n=10): no treatment (control), sandblasting then silane coating and silane application (SB+SC+SI), sandblasting and silane application (SB+SI). All specimens were bonded with RelyX Unicem and horizontally sectioned into three sections and subjected to a push-out test. Data were analyzed using two-way ANOVA. Cercon recorded significant higher bond strength than Cosmopost (P < 0.05). Surface treatments recorded higher values than control group, and SB+SC+SI presented higher bond strength than SB+SI (P < 0.05). There was no significant difference among different root regions (P > 0.05). Therefore Cercon may be more suitable to be used as post materials than Cosmopost. Surface treatments have significant effect on push-out bond strength of zirconia oxide post and SB+SC+SI group presents better bond strength than SB+SI group.