Provisionals Flashcards
1
Q
Name the purpose of provisionals
A
- safeguard and sedate pulp from physical, chemical, thermal and bacterial injuries
- promote perio health
- parallelism of abutment
+ 3 more
2
Q
Features of ideal provisionals
A
- optimal contact areas (prevent mesial distal drifts)
- exact same occlusal contact as uncut teeth
- margin fit
- reasonable colour and anatomy
3
Q
What are the materials used
A
- chemically activated acrylic resins (methyl methacrylate)
- light activated composite resin (udma)
- chemically activated composite resins (bis-gma)
4
Q
What are the features of PEMA (polyethylene methacrylate)
A
- low cost
+ a few more
5
Q
Features of light activated composite resin
A
-
6
Q
Features of chemically activated composite resin
A
-
7
Q
How to compensate for shrinkage at margins
A
Add wax near the marginal areas -> putty will be larger for relining