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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.

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