What are low-viscosity resins that vary int ehri filler content from no filler to more heavily filled resins that are essentially the same as flowable composites?
pit and fissure sealants
What type of composites are highly viscous resins that contain a high volume of filler particles (about 70%) which gives them a stiff consistency and makes them less likey to stick to the composite placement instrument?
Packable composites
Which type of composites are used for restoration of posterior teeth in areas of high function (class I and II restorations) because they are stronger and more wear resistant than most hybrids that contain less filler?
packable composites
What type of composites are marketed as substitutes for amalgams?
packable composites
Why do packable composites shrink less than less heavily filled composites?
because there is less resin and more filler
What does polymerization shrinkage refer to?
the shrinkage that occurs when the composite is cured (polymerized)
true or false. composites do NOT shrink towards the light. They shrink towards the center of the bulk of composite
true
true or false. If you place the composite in the cavity preparation in smaller increments, you will have less polymerization shrinkage
true
true or false. The greater the resin content in a composite material, the greater the polymerization shrinkage
true
The greater the filler content in composite, the _________ the CTE. The greater the resin content, the _______ the CTE
lower
greater
Do microfilled and flowable composites or packable or hybrid varieties have a higher CTE?
flowable and microfilled
true or false. Composites are used in all of G.V. Black's classes of restorations. (I-IV)
true
In choosing the shade of composite material you are going to use for a restoration, when should you apply and cure a small amount of the composite?
On a clean, MOIST tooth, BEFORE isolating with a rubber dam
Generally, the __________ part of the tooth is closest to the dentin color
cervical
Incremental layers of composite will bond to each other (________) if no _______ occurs
chemically
contamination
What type of containers are light cured composites dispensed in? Why?
Opaque containers, so that the material is not affected by light
for most moderately sized or large cavity preparations, the composite resin should be placed in small increments about __ mm thick
