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DENTAL 204
Test Description: Dental Materials
Instructions: Answer all questions to get your test result.
1) The irreversible hydrocolloid material most widely used for preliminary impressions are
A
heavy body material
B
alginate
C
polyether
D
polysulfide
2) Which procedure would require a patient to wear provisional prosthesis for a longer period of time?
A
full gold cast crowns
B
porcelain veneers
C
implants or periodontal therapy
D
porcelain jacket crowns
3) A gingival retraction cord is placed _____ the crown preparation is complete; it is removed ____the final impression is taken.
A
before;after
B
after;before
C
after;after
D
before;before
4) The most common material used for custom provisional coverage is___.
A
light cured composite resin
B
alginate
C
polycarbonate
D
self -curing acrylic resin
5) A post can be used as a retention aid for a crown , provided that the tooth ___.
A
has been treated endodonticcal
B
is vital
C
has not been treated endodontically
D
is not restoreable
6) The final step after cementing provisional coverage is
A
taking a periapical radiograph
B
checking the occlusion
C
polishing the provisional
D
removing the retraction cord
7) The most common type of provisional coverage used for crown and bridge preparation is___
A
preformed polymer crown
B
custom made
C
aluminum crown
D
polycarbonate crown
8) Which of the following procedures take place during the second visit for the placement of a cast restoration
A
preliminary impressions
B
try-in
C
shade selection
D
final impressions
9) _____ crowns are preformed crowns used for provisional coverage on anterior teeth, when appearance is important
A
aluminum
B
composite
C
stainless steel
D
polycarbonate
10) The provisional should ____ below the margin of the preparation
A
extend 6-8 mm
B
not extend
C
extend 2-4 mm
D
extend 1-3 mm
*select an answer for all questions
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