Abstract
Pure titanium was applied to the prefabricated post and its compatibility with cast metal core was examined in comparison with those of the commercially available prefabricated posts of Ni-Cr alloy and 18-8 stainless steel.
The mechanical properties of the titanium post were comparable to those of Type III gold alloy. Although Ni-Cr and 18-8 stainless steel were subjected to annealing during the casting process of the core showing marked decrease in hardness and tensile strength, the titanium post had already annealed during the working process and showed no significant changes in properties when heat-treated up to 1, 000°C. The core alloys exhibited excellent castability against the titanium post, and pure titanium seemed to be applicable to a prefabricated post for the cast metal core if the core could be cast in the neighborhood of 1, 000°C at most.
