10 - Composite Review Flashcards
do you bevel at cavosurface for composite
no
how much into dentin for composite restoration
1/2 mm
T/F: etch dentin only
FALSE! enamel only
why do we air thin
evaporate solvent and thin bonding agent to avoid pooling
should you use bonding agent to dip your insturment and smooth the surface? why?
NO! it inhibits polymerization and can alter final shade of composite. HEMA found in the bonding agents that can affect polymerization and weaken it
what to use as a wetting agent for composite
composite wetting agent or isopropyl alcohol
what is a 45 percent filled, light cured liquid resin
composite wetting resin
jiffy polishers from coarse to fine
green > yellow > white
when is it best to make additions to restoration while air-inhibited layer is still intact
usually in first 30 minutes
what is retention form in class 1/2/5
oclusal/incisal and gingival walls converge
T/F: you can bevel gingival margin on cementum for class 5
NO! bevels on enamel only
why dont you bevel occlusal surface of class 1 or 2
may thin edge that can fx under occlusion and leave an open margin
