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