Composites
Can be utilized for class?
I, II, III, IV, & V
What's a varnish?
Resin dissolved in a solvent used to seal dental tubules of prepared tooth before placing an amalgam restoration
What is the most common liner material?
Calcium hydroxide
What is a base?
A base is a thick layer of cement placed over the layer of preparation to offer strength to restoration
Bacteriostatic
What are the 3 main components of composite?
-Filler articles
-Coupling agent
-Coupling agent
Name contraindication
Can't be used on composites because it inhibits the curing
What are two benefits?
1.Protects the pulp from chemical irritants.
2.Encourages the formation of “secondary” or “reparative” dentin.
How does a base differ from a liner?
It goes on top of the liner and most of them release fluoride
Soluble
Being able to dissolve in a fluid
How far does the curing light depth go?
2 mm
True or false varnish are insoluable in water?
True
What is a drawback?
For a large area it is too weak to support a restoration. For large areas you must also use a harder base material on top of the liner
What are the 3 benefits of a base?
1. Thermal insulation
2. Releases fluoride
3. Strength to support resorative material
Biocompatible
Does not cause harm to the body material reacts well to tissues
Why did we switch from purple to blue light?
Blue light cures deeper in the restoration
True or false varnishes adhere physically?
True
How does a liner work?
It causes a small amount of irritation to stimulate growth of secondary dentin
Where is the base place?
Above the liner
The chemical reaction that sets material
Name 4 of the 11 important properties of composite
Low polymerization, low water, biocpmpatability, thernal conductivity, fracture resistant, wear resistant, radiocapcity, high bond strength, good color, ease of manipulation, ease of finishing and polishing
Name 2 benefits of varnishes
What are the 2 ways the liners are cured?
1. Light cure
2. Chemical cure
What's a drawback for bases?
Some cements are irritating to the pulp
Pulp cap
Placing medicament over nearly exposed dental pulp