Abstract
A simple shear test was employed to determine the bonding strength of porcelain to a gold metal substrate and to a non-precious metal substrate after they had been aged in double-distilled water at 37°C for four and 12 months. A 7.4% and 18.1 % decrease in bond strength after four months and 12 months, respectively, was observed for the porcelain-gold system, and a decrease of 21.2% and 21.4% after four and 12 months, respectively, for the non-precious-porcelain system. A significant difference was observed between the bond strengths of the porcelain-metal composites: 51.17 ± 11.29 MPa for the porcelain-gold system and 31.83 ± 3.65 MPa for the porcelain-non-precious system.
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