composite 2 Flashcards
1
Q
what are the advantages of light curing systems?
A
extended working time -command set less finishing immediate finishing less waste higher filler levels less porosity
2
Q
in which area does composite set most readily?
A
surface
3
Q
what is depth of cure?
A
depth to which the composite polymerises sufficiently
4
Q
what size increments result in under-polymerised base?
A
> 2mm
5
Q
what layer thickness should hybrid composites be?
A
2mm or less
6
Q
what layer thickness should bulk-fill composites be?
A
up to 6mm
7
Q
what are the potential problems with light curing?
A
light/material mismatch -overexpose premature polymerisation from dental lights -avoid exposure optimistic depth of cure values recommended setting times too short polymerisation shrinkage
8
Q
what are safety concerns with light curing?
A
exothermic reaction
-heat conducts to adjacent enamel/dentine
