Page | 1
DASLE MN Questions with Detailed Verified
Answers
When taking alginate impressions, having the patient swish with a
mouth rinse such as Listerine prior to impressing helps decrease all
of the following except:
a: drooling by the patient
B: microorganisms on the impression
C: gagging by the patient
D: bubbles in the material
⼀Answer:⼀ a: Drooling by the patient
You are seating your patient to take alginate impressions, what
position will you have them in?
A: upright
B: reclined
C: standing
D: supine
⼀Answer:⼀ a: Upright
Which of the following would not be an effective communication
method?
A: ask the patient to use predetermined hand signals to
communicate with you
B: explain to the patient that the material may feel cold
C: Ask the patient to breath through their mouth
D: inform the patient that they can bring their head forward and off
the headrest once you have seated the impression
⼀Answer:⼀ C: Ask the patient to breath through their mouth
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In order to best record the muscle attachments, frenums, and
achieve a complete peripheral roll, the operator will need to
perform_________ by gently massaging the patients lips and
cheeks.
A: facial trimming
B: frenectomy
C: muscle trimming
D; muscle rolling
⼀Answer:⼀ C: muscle trimming
A main advantage of polyvinyl siloxane is that it has high
dimensional stability and pouring can be delayed for up to 7-10
days without distorting.
True
False
⼀Answer:⼀ TRUE
Polysulfide is an impression material where the disadvantages
outweigh the advantages. Some of the main disadvantages are the
odor, bad taste, it stains, and has a long setting time.
True
False
⼀Answer:⼀ TRUE
An impression tray should extend _____ mm beyond the last tooth
in the arch.
A: 1-2
B: 2-3
C: 3-4
D: 4-5
⼀Answer:⼀ B: 2-3
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If an alginate impression remains in the open air, moisture will
evaporate from the material, causing it to shrink and distort. This
condition is called:
A: expansion
B: imbibition
C: synersis
D: adaptation
⼀Answer:⼀ C: synersis
As a right handed operator, when seating the mandibular
impression, you want to be standing at the side of the patient, near
8-9 o'clock. When seating the maxillary impression, you will want
to be behind the patients head, near 11-12 o'clock.
True
False
⼀Answer:⼀ TRUE
When might the fabrication of a custom tray be necessary?
A: the stock trays do not fit the patients mouth properly
B: the patient is edentulous
C: the patient needs whitening trays
D: the patient needs a specific orthodontic appliance
E: all of the above
⼀Answer:⼀ E: all of the above
The purpose for the perforations in the impression trays is:
A; to allow the impression material to flow out of the perforations
B: creating a mechanical lock between the impression and the tray
to allow for easier cleaning of the trays
C: to allow air to escape in order to reduce the amount of bubbles
in the impression
D: to help reduce gagging by allowing excess material out of the
mouth
, Page | 4
⼀Answer:⼀ A; to allow the impression material to flow out of the
perforations
What is the water-to-powder ratio for taking an adult maxillary
alginate impression?
A: 1 scoop of powder to 1 measure of water
B: 2 scoops of powder to 2 measure of water
C: 3 scoop of powder to 3 measure of water
D: 1 scoop of powder to 2 measure of water
⼀Answer:⼀ C: 3 scoop of powder to 3 measure of water
A patient is coming in for a crown prep on tooth #30. At the
beginning of the appointment you use polyvinyl siloxane
impression material to take a preliminary impression so you are
able to fabricate a temporary crown. At the end of the appointment
there needs to be a final impression taken of the tooth after it is
prepared. Who is legally responsible and delegated to take this
final impression?
A: RDH
B: LDA
C: RDA
D: DDS
⼀Answer:⼀ D; DDS
An impression is defined as a positive reproduction of oral tissue
and surrounding structures, where a stone cast is a negative
reproduction.
True
False
⼀Answer:⼀ FALSE
Elastomeric impression materials are great for taking final
impressions when accuracy and detail are needed, all of the
following are examples of elastomeric materials except:
DASLE MN Questions with Detailed Verified
Answers
When taking alginate impressions, having the patient swish with a
mouth rinse such as Listerine prior to impressing helps decrease all
of the following except:
a: drooling by the patient
B: microorganisms on the impression
C: gagging by the patient
D: bubbles in the material
⼀Answer:⼀ a: Drooling by the patient
You are seating your patient to take alginate impressions, what
position will you have them in?
A: upright
B: reclined
C: standing
D: supine
⼀Answer:⼀ a: Upright
Which of the following would not be an effective communication
method?
A: ask the patient to use predetermined hand signals to
communicate with you
B: explain to the patient that the material may feel cold
C: Ask the patient to breath through their mouth
D: inform the patient that they can bring their head forward and off
the headrest once you have seated the impression
⼀Answer:⼀ C: Ask the patient to breath through their mouth
, Page | 2
In order to best record the muscle attachments, frenums, and
achieve a complete peripheral roll, the operator will need to
perform_________ by gently massaging the patients lips and
cheeks.
A: facial trimming
B: frenectomy
C: muscle trimming
D; muscle rolling
⼀Answer:⼀ C: muscle trimming
A main advantage of polyvinyl siloxane is that it has high
dimensional stability and pouring can be delayed for up to 7-10
days without distorting.
True
False
⼀Answer:⼀ TRUE
Polysulfide is an impression material where the disadvantages
outweigh the advantages. Some of the main disadvantages are the
odor, bad taste, it stains, and has a long setting time.
True
False
⼀Answer:⼀ TRUE
An impression tray should extend _____ mm beyond the last tooth
in the arch.
A: 1-2
B: 2-3
C: 3-4
D: 4-5
⼀Answer:⼀ B: 2-3
, Page | 3
If an alginate impression remains in the open air, moisture will
evaporate from the material, causing it to shrink and distort. This
condition is called:
A: expansion
B: imbibition
C: synersis
D: adaptation
⼀Answer:⼀ C: synersis
As a right handed operator, when seating the mandibular
impression, you want to be standing at the side of the patient, near
8-9 o'clock. When seating the maxillary impression, you will want
to be behind the patients head, near 11-12 o'clock.
True
False
⼀Answer:⼀ TRUE
When might the fabrication of a custom tray be necessary?
A: the stock trays do not fit the patients mouth properly
B: the patient is edentulous
C: the patient needs whitening trays
D: the patient needs a specific orthodontic appliance
E: all of the above
⼀Answer:⼀ E: all of the above
The purpose for the perforations in the impression trays is:
A; to allow the impression material to flow out of the perforations
B: creating a mechanical lock between the impression and the tray
to allow for easier cleaning of the trays
C: to allow air to escape in order to reduce the amount of bubbles
in the impression
D: to help reduce gagging by allowing excess material out of the
mouth
, Page | 4
⼀Answer:⼀ A; to allow the impression material to flow out of the
perforations
What is the water-to-powder ratio for taking an adult maxillary
alginate impression?
A: 1 scoop of powder to 1 measure of water
B: 2 scoops of powder to 2 measure of water
C: 3 scoop of powder to 3 measure of water
D: 1 scoop of powder to 2 measure of water
⼀Answer:⼀ C: 3 scoop of powder to 3 measure of water
A patient is coming in for a crown prep on tooth #30. At the
beginning of the appointment you use polyvinyl siloxane
impression material to take a preliminary impression so you are
able to fabricate a temporary crown. At the end of the appointment
there needs to be a final impression taken of the tooth after it is
prepared. Who is legally responsible and delegated to take this
final impression?
A: RDH
B: LDA
C: RDA
D: DDS
⼀Answer:⼀ D; DDS
An impression is defined as a positive reproduction of oral tissue
and surrounding structures, where a stone cast is a negative
reproduction.
True
False
⼀Answer:⼀ FALSE
Elastomeric impression materials are great for taking final
impressions when accuracy and detail are needed, all of the
following are examples of elastomeric materials except:
