Tensile Bond Strength of Gold and Porcelain Inlays to Extracted Teeth Using Three Cements

This in vitro study compared the tensile bond strength of gold and porcelain inlays to extracted molars in stanardized cavities. Three cements were used: zinc phosphate, glass-ionomer, and resin composite cement. The inlays were cemented using zinc phosphate or glass-ionomer cement, and the porcelain inlays were luted using resin composite or glass-ionomer cement. Surface treatments included, for gold inlays, either no treatment (zinc phosphate cement) or airborne particle abraded and tinplated (glass ionomer cement) or etched and silane-treated (resin composite cement). Statistical analysis was performed using the Weibull distribution. Results whowed no significant differences between gold inlays cemented using zinc phosphate or glass-ionomer cements. The bonded porcelain inlays (resin composite cement) showed tensile bond strengths two to three times higher than those obtained for cemented gold inlays.