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