Which of the following restorative materials has a coefficient of thermal expansion and thermal conductivity closest to enamel?

Question

Quizplus · Accepted Answer

Porcelain has a coefficient of thermal expansion (×10-⁶/°C)of 15 and thermal conductivity (k)([mcal×cm]/cm sec/°C)of 2.50;enamel has a coefficient of thermal expansion of 11 and thermal conductivity of 2.0.In contrast,the coefficient of thermal expansion of amalgam is 20 to 28,and the thermal conductivity of amalgam is 54,but the coefficient of thermal expansion of composite resin is 26 to 40,and the thermal conductivity of composite resin is 2.60.

Which of the Following Restorative Materials Has a Coefficient of Thermal