In vitro evaluation of shear bond strength of resin cements to computer-aided design/computer-aided manufacturing (CAD/CAM) framework materials

Abstract

The aim of this in vitro study was to compare the shear bond strength (SBS) of three different resin cements to different computer-aided design/computer-aided manufacturing (CAD/CAM) framework materials (cobalt-chromium, titanium, and zirconia). Specimens (12 x 2 mm) were divided into three different main groups according to materials (n=10); Cr-Co discs (Hard metal; HM), titanium discs (T), and zirconia discs (Z) and embedded in acrylic resin, and smoothed with silicon carbide papers and sandblasting with 50 μm aluminum oxide. Specimens of each framework materials were divided into three subgroups; (1) Universal resin cement, (2) Syringeable resin ionomer cement, and (3) Self-adeziv resin cement. The shear bond strength test was conducted using a universal testing machine. Data (MPa) was analyzed using one way ANOVA, Kruskal Wallis tests, and post-hoc tests. There was no statistically significant difference between SBS value of universal resin cement and self-adhesive cement for each material (P > 0.05). Resin ionomer cement showed the lowest SBS value (P < 0.05). No significant differences in SBS were found between framework materials. The SBS values of self-adhesive cements are as high as universal resin cements for hard metal, titanium and zirconium supported restorations. Keywords : Shear bond strength, hard metal milling, titanium, zirconia. DOI : 10.7176/JSTR/5-2-11