The science of dental materials involves a study of the composition and properties of materials and the way in which they interact with the environment in which they are placed.
All materials have physical properties like color, weight, solubility, thermal conductivity, and others, also mechanical properties like hardness or softness, strength or weakness.
There is no material till know has ideal physical or mechanical properties . Most material s have some good and bad properties and sometimes a property that is bad in one material may be good or acceptable in another .