Abstract
An experimental Co-Cr alloy containing 2% titanium with an additional 0.5% ziruconium was prepared and the castability and bond strength to dental porcelain for castings obtained under various casting conditions were evaluated and/or compared with Dentitan.
The results were as follows:
1. When the vacuum was decreased, internal defects of castings obtained with the experimental alloy were remarkably observed, however, these defects were smaller than those of castings obtained with Dentitan.
2. The experimental alloy showed excellent castability of # 26 sheet wax under all casting conditions.
On the other hand, castability of # 28 sheet wax indicated that casting efficiency was decreased under a lower vacuum condition.
3. In this study, castability of the experimental alloy was equal or superior to that of Dentitan.
4. When casting at 0.7 bar, both the experimental alloy and Dentitan indicated maximum bond strength in this study.
