Physical Properties

Physical Properties

1. Density

   • Amount or mass of a material in a given volume

2. Thermal Conductivity

   • Rate of heat flow through a material

3. Vapor Pressure

   • Measure of a liquid tendency to evaporate and become a gas

4. Heat Capacity

   • A measure of the amount of thermal energy that a material can hoard
   • Specific Heat Capacity
     • Amount of energy needed to raise the temperature of one unit of mass of that material by 1 degree celsius

5. Heat of Fusion

   • Amount of energy required to melt a material
   • Heat of Vaporization
     • Amount of energy required to boil a material

6. Coefficient of Thermal Expansion

   • How much material changes when exposed to heat (temperature)

7. Percolation

   • Space between dental material and tooth causing a leakage

8. Galvanic Shock

   • Result of electricity flowing from the fork to the amalgam and through the pulp

9. Viscosity

   • Ability to flow
   • Good-wetting (low contact angle)
     • (low viscosity) How good a material for impression spreads
   • Poor wetting (high contact angle)
     • (high viscosity) Are not good spreading materials

10. Hardness

    • Property that is measured by scientific instrument that is pressed into surface of material

11. Abrasion Resistance

    • Ability to withstand rubbing and folding

12. Solubility

    • Amount of material dissolved in a liquid

13. Water Sorption

    • The weight that is gained when imersed in water

14. Shade Guide

    • Set of color tabs or shades for esthetic materials