Composite Resin

3 important questions on Composite Resin

What are the four major components of composite resin?

Organic matrix
Reinforcing fillers
(usually radiopaque glass)
Silane coupling agent (binds filler to matrix)
Chemicals that promote or modulate polymerisation reaction

List the three available monomers for resin composite and compare their viscosity/flowability.

Bowen's resin Bis-GMA - viscous, needs thinning
Urethane dimethacrylate UDMA - less viscous than Bowen's resin Bis-GMA
Modified Bis-GMA (or UDMA) - very flowable, not viscous

What are the three prevalent fillers used for composite resin?

Quartz (SiO2)
Radiopaque glass
Amorphous silica (SiO2)

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