Effect of Sandblasting on Shear Bond Strength Composite Resin Veneer

Attachment between restoration and enamel surface in indirect resin composite veneer restoration (ircv) is obtained using multi-step (ms) resin cement. recently, a one step self-adhesive dual-cured resin cement (sadrc) was introduced. objective: to determine the effect of sandblasting on shear bond strength (sbs) of ircv to enamel using ms resin cement and sadrc. methods: forty specimens of buccal surface of enamel human premolar were used. the specimens were flattened and polished using silicon carbide. ircv cylindrical specimens were light-cured in solidilite chamber and were divided into two groups: ircv without sandblasting (n=20) and with sandblasting for 10 seconds (n=20) and then bonded to enamel using ms (n=10) and sadrc (n=10), respectively. after 24h sbs of specimens were tested using a universal testing machine. data were analyzed statistically by one-way anova. results: the average sbs value of ircv without sb and bonded with ms was 18.95±7.80mpa and ms with sb was 19.30±8.21mpa. they were differ significantly with sadrc without sb (4.85±2.12mpa) and sadrc with sb (9.57±3.45mpa)(p<0.05). conclusion: sandblasting significantly increased sbs virk to enamel using ms resin cement than sadrc.