dental materials

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Author:
cassiedh
ID:
77995
Filename:
dental materials
Updated:
2011-04-18 14:44:48
Tags:
ch12review
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Description:
ch 12 review questions
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  1. the goal of finishing and polishing of restorations includes
    a. removal of excess material
    b. the smoothing of roughened surfaces
    c. ther production of better esthetics
    d. all of the above
    d. all of the above
  2. cleansing of teeth is primarily meant to
    A. remove excess material
    B. remove soft deposits
    C. recontour surfaces
    D. smooth roughened surfaces
    B. remove soft deposits
    (this multiple choice question has been scrambled)
  3. the depth and space between cuts made by an abrasive are determined by
    A. both a and b
    B. contour of the restoration
    C. the properties of hte material being abraded
    D. the prpertice of the abrasive
    A. both a and b
    (this multiple choice question has been scrambled)
  4. which of the following represents the correct hardness ranking from hardest to softest
    A. gold, amalgam, composite, enamel
    B. amalgam, enamel, composite, gold
    C. enamel, amalgam, gold, composite
    D. composite, enamel, gold amalgam
    B. amalgam, enamel, composite, gold
    (this multiple choice question has been scrambled)
  5. all of the following will increase the rate of abrasion EXCEPT
    A. increased pressure
    B. decreased speed
    C. use of larger abrasive particle
    D. use of more abrasive particle than the substrate
    B. decreased speed
    (this multiple choice question has been scrambled)
  6. mohs' scale ranks
    a materials by their relative abrasion resistance
    b. hardness of a material
    c. abrasiveness of material
    d. both a and b
    d. both a and b
  7. to control the numbers of abrasive particles that contact the surface
    A. the operator should not use rotarty instruments
    B. the operator should use a lubricant
    C. the operator should decrease the pressure
    D. the operator should increase the speed
    B. the operoatro should use lubricant
    (this multiple choice question has been scrambled)
  8. loos abrasives
    A. come in various shapes
    B. use sterilizable mandrels
    C. are used on cups and brushes
    D. are safe sided
    C. are used on cups and brushes
    (this multiple choice question has been scrambled)
  9. when performing an amalgam polishing procedure, which of the following can produce the most harmful biologic effect?
    A. odor
    B. heat
    C. products of tarnish
    D. airborne debris
    D. airborne debris
    (this multiple choice question has been scrambled)
  10. the substance used to preven a dentifrice from drying is called
    A. humectant
    B. binder
    C. alkaline peroxide
    D. detergent
    A. humectant
    (this multiple choice question has been scrambled)

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