Amalgam Flashcards
1
Q
Two types of shapes of the alloy particles
A
spherical (circle)
lathe cut (irregular)
2
Q
What occurs in the y2 phase
A
increased corrosion and lower strength
3
Q
What 4 components are in amalgam
A
silver (70%)
tin
copper
zinc
4
Q
On initial set amalgam is quite weak and can fracture, how long does it take to reach optimal strength
A
24 hours
5
Q
2 Advantages of using amalgam
A
good compressive strength for forces of chewing/biting
hard wearing
6
Q
4 Disadvantage of using amalgam
A
marginal breakdown due to being corrosive
mercury is toxic
poor aesthetics
requires more cavity prep due to not bonding to tooth
