Dental Co-efficient of Thermal expansion of amalgam is A 6.6 a (ppm k-1) B 11.4 a (ppm k-1) C 14.0 a (ppm k-1) D 25.0 a (ppm k-1) 💡 Explanation Co-efficient of Thermal expansion of amalgam is ✓ Correct Answer: D. 25.0 a (ppm k-1)