Bonding strength of porcelain fused to pure titanium and marginal distortion during firing

Abstract

When porcelain is fused to pure titanium, certain problems arise with the coarseness of oxidative adhesion and strong oxidation of the metal surface. We compared marginal distortion of metal frame during the firing of porcelain on pure titanium, precious alloy, semi-precious alloy and non-precious alloy. In addition, we studied how the oxidation heat temperature affected bonding strength. Marginal distortion of the pure titanium metal frame was considerably less than that of the other three metals after degassing, and was relatively small and constant during firing. Oxidation for three minutes at 500 to 800℃, created a high bond strength and produced the lowest coefficient of variation with a stable bond.