OptiBond All-In-One (Kerr) is a self-etch adhesive that combines the essential ingredients needed for etching, priming, and bonding into one material, thereby drastically simplifying clinical procedures and reducing technique variability. Objectives: To evaluate the influence of surface treatments on shear bond strength (SBS) of OptiBond All-In-One on bovine enamel surface. Methods: Bovine teeth were embedded into acrylic resins with facial surface exposed. In each group, 12 enamel specimens were used. “Un-cut” bovine enamel substrates were cleaned with pumice. To obtain “cut” enamel surface, bovine specimens were polished with diamond burs, followed by cleaning with pumice. For etched substrates, Gel Etchant (Kerr) was used to etch enamel substrates for 3 s and 15 s, followed by thorough water rinsing. OptiBond All-In-One adhesive was then applied according to the manufacturer's instructions. A composite (Herculite XRV, A2, Kerr) was condensed into the mold (D=2.38mm) of a bonding jig (Ultradent) and light-cured. The SBS was tested after storage in de-ionized water (37°C, 24 hours). Results: ANOVA analysis revealed that the SBS on all enamel substrates are not significantly (p > 0.05) different.
| Un-cut Enamel | Cut Enamel | ||||
Etching time | No etch | 3 s | 15 s | No etch** | 3 s | 15 s |
SBS in MPa (STDEV) | 28.7 (5.5)a* | 32.2 (5.5)a | 30.8 (4.5)a | 30.4 (3.7)a | 30.8 (5.2)a | 28.9 (3.5)a |
** Recommended by the manufacturer.
Conclusion: Shear bond strength of OptiBond All-In-One on un-cut and un-etched enamel is as good as that on cut and/or etched enamel.