Effect of casting of five different ratios of fresh / used two ceramo-metallic alloys on bond strength to porcelain

Two ceramo-metal non-precious alloys with one type of porcelain were used in this study. Five different ratios of fresh-used alloys were tested for their bond strength with porcelain. The ratios used by weight was as follow: 100% fresh, 75% fresh and 25% used, 50% fresh and 50% used, 25% fresh and 75% used, 100% used alloy. Five rod samples were cast for each group with a total of 50 samples. Porcelain was applied and tested for shear bond strength. Results were tabulated and statistically analyzed