Dental Materials

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Author:
cassiedh
ID:
75100
Filename:
Dental Materials
Updated:
2011-03-24 23:02:15
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ch10reviewquestions
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Description:
chapter 10 review questions
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  1. a gold alloy that is 50% gold has how many karats
    A. 24
    B. 14
    C. 12
    D. 18
    C. 12
    (this multiple choice question has been scrambled)
  2. the ada recognizes which three major categories of alloys?
    A. high noble, noble and low noble
    B. high noble, noble, base metal
    C. precious, semiprecious and nonprecious
    D. class I II and III
    B. high noble, noble, base metal
    (this multiple choice question has been scrambled)
  3. high noble metal classification must contain what pecent by wieght of gold
    A. 90%
    B. 75%
    C. 40%
    D. 60%
    C. 40%
    (this multiple choice question has been scrambled)
  4. noble metal elements include all ofthe following except
    A. silver
    B. gold
    C. palladium
    D. platinum
    A. silver
    (this multiple choice question has been scrambled)
  5. porcelain bonding alloys form oxides on their surfaces that chemically bond with the porcelain at high temperatures. which of the following metals may be added to the alloys to help form these oxides?
    A. cobalt or chromium
    B. indium or tin
    C.silver or copper
    D. lead or beryllium
    B. indium or tin
    (this multiple choice question has been scrambled)
  6. metal that is formed by casting into an ingot or bar and then is altered in its form by extruding or pressing it is known as
    A. wrought metal
    B. transformed metal
    C. stainless steel
    D. milled metal
    A. wrought metal
    (this multiple choice question has been scrambled)
  7. high noble alloys usually have which metals added to increase their strength
    A. iron or aluminum
    B. silver or copper
    C. nickel or beryllium
    D. chromium or cobalt
    B. silver or copper
    (this multiple choice question has been scrambled)
  8. which type of orthodontic wire is more difficult to adapt as an arch wire becasue of its springiness and tendency to maintain its original shape?
    A. nickel-titanium
    B. gold
    C. stainless steel
    D. cobalt-chrome nickel
    A. nickel titanium
    (this multiple choice question has been scrambled)
  9. allergy to nickel
    A. is seen only in the oral cavity
    B. occurs in less than 3% of the population
    C. is associated more often with parital denture framworks than with crowns
    D. occurs 10 times more often in women than in men
    D. occurs 10 times more often in women than in men
    (this multiple choice question has been scrambled)
  10. solder has all of the following uses except
    A. adding a contact to crown
    B. repairing a hole in the occlusal surface of a crown discovered at the periodic oral examination
    C. joining a pontic to a bridge retainer
    D. joining a wire loop to a band to make a space retainer
    B. repairing a hol ein the occlussal surface of a crown discovered at the periodic oral examination
    (this multiple choice question has been scrambled)
  11. the purpose of a flux used during soldering is to
    A. remove oxides from the surfaces of the metals to be soldered so the solder can flow and wet the surfaces better
    B. make the solder harden quickly
    C. lower the metling point of the solder
    D. prevent the solder from flowing to areas where the solder is not needed
    A. remove oxides from the surface of the metals and blah blah blah read it above that one is long
    (this multiple choice question has been scrambled)
  12. preformed metal posts are vailable in all of the following materials except
    A. stainless steel
    B. gold
    C. titanium
    D. titanium alloy
    B. gold
    (this multiple choice question has been scrambled)
  13. the purpose of a post is to
    A. strengthen the root
    B. strengthen the core material
    C. put a permanent seal over the root canal filling material
    D. retain the core material
    D. retain the core material
    (this multiple choice question has been scrambled)
  14. which one of the following statements about cast posts is false
    A. the are used in practice far more often than preformed posts
    B. they usually ahve the core attached as part of the casting
    C. they are formed from a wax or acrylic resin patter
    D. they can be cast using high-noble, noble or base metal alloys
    A. they are used in practice far more often than preformed posts
    (this multiple choice question has been scrambled)

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