INFLUENCE OF DIFFERENT TEST DEVICES USED ON THE SHEAR BOND STRENGTH TEST OF TITANIUM TO INDIRECT COMPOSITE

Abstract

Objective: The aim of this study was to evaluate the influence of the different devices on the shear bond strength between the titanium (Ticp) and an indirect resin. Material and Method: Thirty metallic cylinders of Ticp (height: 5 mm; diameter: 4 mm) obtained by machining of pure commercially titanium bar (Ticp). The metallic cylinders had their adhesive surface sandblasted (Al2O3; 110μm). All cylinders were immerged in isopropyl alcohol 10% and were cleaned ultrasonically (10 min). Two layers of the resin Opaque Sinfony were applied on the metallic cylinders and cured in the Visio Alfa and Visio Beta units, according to the manufacturer’s recommendation. The esthetic resin Sinfony was applied (height: 5 mm; diameter: 4 mm) on the opaque layer using a teflon device, according to the manufacturer’s instructions. The specimens were divided into three groups, according to the shear device used (n=10): Gr1: piston, Gr2: knife without a groove; Gr3: knife with a groove. The shear test was performed in a universal testing machine. Bond strength results were analyzed using one-way ANOVA. Results: The means and standard deviations obtained were: Gr1- 5.49 ± 1.41 MPa, Gr2- 5.37 ± 0.8 MPa and Gr3- 5.56 ± 1.92 MPa. Conclusion: All devices used showed similar performance on the bond strength between metal/resin (p=0.9550>0.05). DESCRIPTORS: Shear bond strength. Titanium. Dental materials.