Bond Strength of Different Adhesive Options for Filtek^TM Silorane

Objectives: This study compares the shear bond strengths (SBS) of total etch (TE) and self-etch (SE) adhesive options for Filtek^TM Silorane to cut enamel and dentin.

Materials and methods: Bovine incisors were embedded in cold-cure acrylic resin. The labial surface of each tooth was ground to expose enamel or dentin. The surfaces were treated with the self-etching Silorane System Adhesive Primer and Bond (SSAPB-SE, 3M ESPE), with the Silorane System Adhesive after a 15s phosphoric acid etch (SSAPB-TE), with the self-etching Adper^TM Easy Bond followed by the Silorane System Adhesive Bond (AEB-SSAB-SE, 3M ESPE), with the total etch Adper^TM Scotchbond 1XT followed by the Silorane System Adhesive Bond (SB1XT-SSAB-TE, 3M ESPE). Then, cylindrical buttons of Filtek^TM Silorane (4.67mm diameter, 2mm height) were cured on the treated tooth surfaces. All materials were applied and cured according to the instructions for use (n=5). After storage for 24h in water at 37°C, the specimens were tested in shear mode using a Zwick Z010 universal testing machine (crosshead speed 2mm/min).

Results: The table shows the SBS in MPa. The standard deviations (SD) are given in parentheses. All data were analyzed by ANOVA and multiple comparisons using Fisher's LSD procedure (p<0.05). Same letters indicate statistically the same means.

Conclusion: For SSAPB, etching increased the bond strength to enamel compared to application in the self-etch mode, while the dentin bond strength remained unchanged. SSAPB-TE yielded statistically the same bond strengths as SB1XT-SSAB-TE. SSAPB-SE yielded statistically the same bond strengths as AEB-SSAB-SE.