Composite chemistry

C factor - ratio of bonded to unbonded surfaces in the preparation

Organic resin matrices and inorganic fillers consisting of proprietary combinations of silica, quartz, zirconia, and pre-polymerized resins

Silane - tris(2-methoxyethoxy) vinyl silane  bonds silica to polymer

JADA

 

Photo-initiator

1. Camphoroquinone CQ (yellow) stimulates amine co-initiator to release free radical and initiate resin polymerization
2. Ivocerin allows increase depth of cure for Tetric EvoCeram Bulk - doesn't need co-initiator
3. PPD pheyl-propanedione - less yellowing than CQ
4. Lucirin TPO - less yellowing than CQ so sometimes used in translucent or light shades

Bryan Bauer, DDS, FAGD