Chapter 17 Question and answers rated A+ 2024/2025
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Course
GYPSUM AND WAX
Institution
GYPSUM AND WAX
Chapter 17 Question and answers rated A+ 2024/2025 Chapter 16 - Gypsum and Wax Products
B - Dental Stone - correct answer Carefully controlled calcination under steam pressure in a closed container produces
A. plaster
B. dental stone
C. high strength stone
D. high strength, high expansion...
Chapter 16 - Gypsum and Wax Products
B - Dental Stone - correct answer ✔Carefully controlled calcination under
steam pressure in a closed container produces
A. plaster
B. dental stone
C. high strength stone
D. high strength, high expansion stone
C - Increase the water temperature - correct answer ✔To decrease the
working time of a gypsum product, with-out changing any physical properties,
it is best to
A. decrease the water-to-powder ratio
B. increase the rate of spatulation
C. increase the water temperature
D. decrease the water temperature
C - particle size and shape - correct answer ✔The main difference between
model plaster and dental stone is
A. chemical formula
B. solubility in water
C. particle size and shape
D. accelerators and retarders
C - Type 3 - correct answer ✔The most appropriate type of gypsum product
to use for orthodontic casts is
A. Type 1
B. Type 2
,C. Type 3
D. Type 4
A - Loss of gloss - correct answer ✔Initial setting can be detected clinically
by
A. loss of gloss
B. the end of the exothermic reaction
C. a change in color
D. testing to see whether the material is hard enough to separate from the
impression
C - anatomic portion - correct answer ✔The area of the diagnostic cast that
records the hard and soft tissues is called the
A. art portion
B. base
C. anatomic portion
D. impression
A - both statements are true - correct answer ✔A study model is a positive
reproduction. An impression is a negative reproduction.
A. both statements are true
B. both statements are false
C. the first statement is true, the second statement is false
D. the first statement is false, the second statement is true
A - saliva - correct answer ✔Material that will act as retarders for the set of
gypsum products include
A. Saliva
, B. Set gypsum products
C. slurry water from the model trimmer
D. non of the above are considered retarders
D. A and B - correct answer ✔It is important to consider the following
statements when pouring an impression
A. alginate impressions should remain unseparated from the model for only 1
hour
B. when the single-step method is used, the material poured into the
impression must reach the initial set before the base is poured
C. Gypsum should be mixed as wet as possible to allow for sufficient working
time
D. A and B
E. A and C
A - patient education - correct answer ✔Diagnostic casts are used for
A. patient education
B. fabricating dentures
C. fabricating crowns
D. fabricating orthodontic appliances
E - A and C - correct answer ✔CAD/CAM fabrication of indirect restorations
eliminates the need for
A. investing
B. cutting the preparation
C. impression taking
D. A and B
E. A and C
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