Dental Materials

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  1. in the amalgam restoration which of the following elements has the most effect on corrosion reduction?
    A. mercury (Hg)
    B. copper (Cu)
    C. silver (Ag)
    D. iron (Fe)
    B. copper (Cu)
    (this multiple choice question has been scrambled)
  2. In the amalgam restoration the two main components are
    A. silver and mercury
    B. mercury and zinc
    C. copper and tini
    D. silver and copper
    A. silver and mercury
    (this multiple choice question has been scrambled)
  3. why should all remnants of amalgam be removed form the placement instruments before they are autoclaved?
    a. the steam causes the amalgam to fuse to the stainless steel
    b. amalgam corrosion products produce by the steam are toxic
    c. the heat cuases mercury vapor to be released from the amalgam
    d. blah blah blah blah blah
    • d. blah blah blah blah blah...okay not really its
    • C. the heat causes mercury vapor t be released from the amalgam
  4. the strength of the amalgam restoration can be affect by
    a. over trituration
    b. under trituration
    c. corrosion
    d. all of the above
    d. all of the above
  5. a properly mixed amalgam should appear
    A. liquid like and should pour easily out of the capule
    B. soupy and shingy
    C. as a homgeneous mass with a slight shine
    D. dry and crumbly
    C. as a homogeneous mass with a slight shine
    (this multiple choice question has been scrambled)
  6. scrap amalgam should be
    A. put into the genral nonmedical waste
    B. autoclaved before it is sent to the recycler
    C. thrown into the incinerator
    D. stored under water in a sealed container
    D. stored under water in a sealed container
    (this multiple choice question has been scrambled)
  7. with high copper alloys, which metal reacts with copper to reduce gamma2 phase corrosion
    A. silver
    B. lead
    C. zinc
    D. tin
    D. tin
    (this multiple choice question has been scrambled)
  8. 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
    d. all of the above
  9. 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
    d. all of the above
  10. bonding an amalgam during placement of a resoration
    A. keeps it from corroding
    B. prevents tarnish
    C. seals the margins and reduces microleakage
    D. increase posoperative sensitivity
    C. seals the margins and reduces microleakage
    (this multiple choice question has been scrambled)
  11. how dose tarnish differ from coorosion?
    A. I think I have developed carpal tunnel from typing all these
    B. tarnish is more harmful than corrosion
    C. tarnish occurs only on the surface
    D. tarnish contributes to destructive effects seen in gamma 2 phase
    C. tarnish occurs on the surface
    (this multiple choice question has been scrambled)
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70356
Card Set
Dental Materials
Description
ch 9 review questions
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