Classification of Composites and their Properties

Type	Properties
Conventional Composite	Contain filler particle size of 8-12 micrometers It is the composite with largest filler size High strength and hardness Less water soprtion and Coefficient of thermal expansion Polishing is difficult and results in rough surface that tends to retain stains
Micro filled Composite	Contain smallest filler particles of size 0.04 - 0.4 micrometers Colloidal silica is used as a filler It has lowest filler content of 50% weight Lowest strength and hardness Highest thermal expansion coefficient and water sorption Excellent esthetics due to the increased smoothness
Small Particle	Contain filler particles of size 1 - 5 micrometers It has good surface smoothness like microfilled composites and improved physical properties like conventional composite It has the highest compressive strength of all composites
Hybrid Composite	It has filler particle size of 0.6 - 1 micrometer They have smooth finish and better esthetics than small particle but yet have similar physical properties.