Dental Materials

in the amalgam restoration which of the following elements has the most effect on corrosion reduction?
A. silver (Ag)
B. copper (Cu)
C. mercury (Hg)
D. iron (Fe)

In the amalgam restoration the two main components are
A. mercury and zinc
B. copper and tini
C. silver and mercury
D. silver and copper

why should all remnants of amalgam be removed form the placement instruments before they are autoclaved?
A. amalgam corrosion products produce by the steam are toxic
B. blah blah blah blah blah
C. the heat cuases mercury vapor to be released from the amalgam
D. the steam causes the amalgam to fuse to the stainless steel

the strength of the amalgam restoration can be affect by
A. over trituration
B. under trituration
C. corrosion
D. all of the above

a properly mixed amalgam should appear
A. dry and crumbly
B. as a homgeneous mass with a slight shine
C. liquid like and should pour easily out of the capule
D. soupy and shingy

scrap amalgam should be
A. thrown into the incinerator
B. stored under water in a sealed container
C. autoclaved before it is sent to the recycler
D. put into the genral nonmedical waste

with high copper alloys, which metal reacts with copper to reduce gamma2 phase corrosion
A. tin
B. silver
C. lead
D. zinc

the fact that mercury makes up almost half of the amalgam has caused concerns about
A. its safety for pt use
B. risks to the office staff
C. environmental effects of improper disposal of amalgam waste
D. all of the above

amalgam has been popular for restorations of carious teeth because
a it is economical
b. it has excelletn physical properties
c. it is easy to manipulate
d. all of the above

bonding an amalgam during placement of a resoration
A. increase posoperative sensitivity
B. seals the margins and reduces microleakage
C. keeps it from corroding
D. prevents tarnish

how dose tarnish differ from coorosion?
A. tarnish contributes to destructive effects seen in gamma 2 phase
B. tarnish occurs only on the surface
C. tarnish is more harmful than corrosion
D. I think I have developed carpal tunnel from typing all these