Dental In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to: A Improve bonding B Decrease porosity C They react with the porcelain opaque layer, which masks the metal D Improves the thermal expansion between the metal and porcelain 💡 Explanation In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to: ✓ Correct Answer: A. Improve bonding