amalgam Flashcards
1
Q
which metal makes-up the liquid element of amalgam?
A
mercury
2
Q
which metals make up the powder element of amalgam?
A
silver, tin, copper, zinc
3
Q
which metal element has been eliminated from most of todays amalgams?
A
zinc
4
Q
name 2 types of amalgam particles?
A
lathe cut
spherical
5
Q
name some good properties of amalgam?
A
good abrasion resistance
ok compressive strength after 24hrs
radiopaque
6
Q
name some bad properties of amalgam?
A
high thermal expansion high thermal conductivity doesn't bond to tooth poor aesthetic setting shrinkage not anticariogenic
7
Q
copper enriched amalgam is stronger due to reducing which phase?
A
y2
8
Q
what are the benefits of copper enriched amalgam?
A
higher early strength
less creep
high corrosion resistance
increased durability of margins
