Varnishes
insoluable
What is a base?
A cement placed in a thicker layer
What is a common liner material?
Calcium Hydroxcide
What are the components of composite?
Resin Matrix, Coupling agent, Filler particles
List one of the two benefits of varnishes
-Less microleakage
-fills dentinal tubules
What are three reasons to place a base?
1) Thermal insulation
2) Strength to support restorative material
3) Many bases produce fluoride
What does a liner accomplish?
It protects the nerve of the tooth
What is the rationale for curing composite in increments?
The light may not be able to penetrate past 2mm.
A contraindication of varnishes
cannot be used with composite restorations
Can be irritating to the pulp
Name a situation that would need a liner?
Deep filling that is close to the nerve
What was the problem with early composites and how was it fixed?
They were radiolucent. Metals were added to make them radiopaque.
How do varnishes adhere?
Physically
What would be a compensation for drawback?
Place a liner
True!!
What are the three commonly known filler particle sizes?
Macrofill, Microfill, Hybrid
Varnishes are placed to seal the tooth before amalgam placement. (T or F)
True!
Base is placed on top of a liner. (T or F)
True!
One benefit of liners is protecting the pulp from chemical irritants. What is a second benefit?
encourages the formation of reparative (secondary dentin)
The microfill is the most commonly used. (T or F)
False! (Hybrid is the most common)