Resin Composites 2 Flashcards
1
Q
What light has maximum camphorquinone absorption
A
blue light
460-480nm
2
Q
what are 3 mechanisms influenced by chemical affects
A
abrasive
erosive
fatigue
3
Q
what is abrasive
A
hard aperities penetrate the polymer matrix removing materials by shearing and cutting
4
Q
what is erosion
A
impact of asperities produces damage of polymer matrix
5
Q
what is fatigue
A
local deformation of the polymer are subject to repeated stresses resulting in its failure
6
Q
what is resin matrix softenign
A
inhibition of polymerisation due to entrapped air pockets
chemical softening
7
Q
what rate increases when there is porosity press
A
crack propagtaion
