DASLE MN EXAMS SCRIPT 2025/2026 QUESTIONS AND
ANSWERS RATED A+
✔✔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 - ✔✔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 - ✔✔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:
A: polyvinyl siloxane
B: reversible hydrocolloid
C: polysulfide
D: polyether
E: silicone - ✔✔B: reversible hydrocolloid
✔✔The _______ tray covers half of a dental arch.
A: Full-arch
B: custom
C: section
D: quadrant - ✔✔D: quadrant
✔✔When seating an alginate impression in the mouth, it is centered over the teeth and
then:
A: seated in the anterior first, then the posterior
B: seated in the posterior first, then the anterior
C: seated left to right
D: seated right to left
E: it doesn't matter as long as you get is into the patients mouth before it sets up - ✔✔B:
seated in the posterior first, then the anterior
✔✔Baseplate wax is _________ prior to placing it in the patients mouth for a bite
registration.
A:molded
,B: placed in a tray
C: warmed
D: cooled - ✔✔C: warmed
✔✔You have just finished taking alginate impressions for bleaching trays, but are
unable to pour them up right away. What should you do?
A: keep them on the counter until you are ready to pour them up
B: wrap them in a moist paper towel and place them in a plastic bag
C: soak them in a bowl of water
D: let them dry out as pouring up dry impressions is easier - ✔✔b: wrap them in a moist
paper towel and place them in a plastic bag
✔✔The medium mandibular stock tray you have tried in your patients mouth seems to
be hitting the lingual areas of both the right and the left teeth, what size tray should you
tray in your patients mouth next?
A: large
B: small - ✔✔B: SMALL
✔✔Which of the following would not be a critical item when evaluating a maxillary
impression?
A: hamular notch
B: tuberosity
C: retromolar area
D: palate - ✔✔C: retromolar area
✔✔For a mandibular impression, the correct length of the tray would include:
A: tuberosity
B: retromolar area
C: hamular notch
D: tooth #16 if present - ✔✔B: retromolar area
✔✔The setting time is the time from the start of the mix until the material has set; where
the working time is the time for mixing the alginate, loading the tray and positioning the
tray in the patients mouth.
True
False - ✔✔TRUE
✔✔When selecting a tray for an alginate impression, how much space is sufficient
between the occlusal surface and the tray?
A: 1-2mm
B: 2-3mm
C: 3-6mm
D: 6-7mm - ✔✔B: 2-3mm
,✔✔When mixing alginate impression material, by decreasing the temperature of the
water, you will _____________ your working time.
A: decrease
B: increase - ✔✔B: INCREASE
✔✔If the maxillary tray needs to be extended 2-3mm posteriorly, which of the following
would be used to extend the tray?
A: baseplate wax
B: sticky wax
C: utility wax
D; silicone impression material - ✔✔C: utility wax
✔✔What may occur to your poured up model if you did not remove bioburden from the
impression?
A: the gypsum may not set correctly because the bioburden may interfere with the
setting
B: the gypsum may be biohazard permanently
C: the gypsum will remain runny
D: the gypsum may set too quickly causing bubbles - ✔✔A: the gypsum may not set
correctly because the bioburden may interfere with the setting
✔✔A set of casts are to be mounted (articulated) to show occlusal relationship of the
MX and MN teeth. What is needed to complete this process?
A: bite registration
B: articulating impression
C: bite block
D: articulating paper - ✔✔A: bite registration
✔✔To best record the patients lingual frenum, you should ask the patient to stick their
tongue up and out of their mouth after seating the mandibular tray.
True
False - ✔✔TRUE
✔✔If an alginate impression is submerged in water, it will take in water causing it to
swell thus distorting the impression. This is known as imbibition.
True
False - ✔✔TRUE
✔✔For the dental dam, when punching holes for the maxillary arch, holes should be
punched approximately __________ down from the top of the material.
A: 5 inches
B: 4 inches
C: 3 inches
D: 2 inches
, E: 1 inch - ✔✔E: 1 inch
✔✔You are placing the dental dam clamp for treatment on tooth #14. Which instrument
grasp will you use to place the clamp?
A: thumb-to-nose grasp
B: palm grasp
C: reverse palm grasp
D; Ppalm-thumb grasp - ✔✔C: reverse palm grasp
✔✔For dental dam, when punching holes for mandibular posterior placement, the holes
should be punched _______ from the side of the material.
A: 1 inch
B: 2 inches
C; 3 inches
D: 4 inches - ✔✔B: 2 inches
✔✔You place the rubber dam and notice that there are gaps between the teeth that can
cause materials to leak in and out of the area of isolation. What is the probable cause of
this?
A: either the holes are punched too far apart, or you used too large of a hole on the
dental dam punch
B: holes punched too far apart
C: using too large of a hole on the dental dam punch
D: A & C - ✔✔A: either the holes are punched too far apart, or you used too large of a
hole on the dental dam punch
✔✔For the dental dam clamps, "W" means wingless and "A" means partially erupted.
True
False - ✔✔TRUE
✔✔You are placing a dental dam on an adult patient who is having endodontic
treatment on tooth #19, what size dental dam material are you going to choose?
A: 6x6
B: 5x5
C: 4x4 - ✔✔A: 6x6
✔✔A double bowed clamp is used:
A: for class V restorations
B: to retract the gingiva on facial surfaces of anterior teeth
C: to isolate tooth #8 during endo treatment
D: All of the above - ✔✔D: All of the above
ANSWERS RATED A+
✔✔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 - ✔✔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 - ✔✔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:
A: polyvinyl siloxane
B: reversible hydrocolloid
C: polysulfide
D: polyether
E: silicone - ✔✔B: reversible hydrocolloid
✔✔The _______ tray covers half of a dental arch.
A: Full-arch
B: custom
C: section
D: quadrant - ✔✔D: quadrant
✔✔When seating an alginate impression in the mouth, it is centered over the teeth and
then:
A: seated in the anterior first, then the posterior
B: seated in the posterior first, then the anterior
C: seated left to right
D: seated right to left
E: it doesn't matter as long as you get is into the patients mouth before it sets up - ✔✔B:
seated in the posterior first, then the anterior
✔✔Baseplate wax is _________ prior to placing it in the patients mouth for a bite
registration.
A:molded
,B: placed in a tray
C: warmed
D: cooled - ✔✔C: warmed
✔✔You have just finished taking alginate impressions for bleaching trays, but are
unable to pour them up right away. What should you do?
A: keep them on the counter until you are ready to pour them up
B: wrap them in a moist paper towel and place them in a plastic bag
C: soak them in a bowl of water
D: let them dry out as pouring up dry impressions is easier - ✔✔b: wrap them in a moist
paper towel and place them in a plastic bag
✔✔The medium mandibular stock tray you have tried in your patients mouth seems to
be hitting the lingual areas of both the right and the left teeth, what size tray should you
tray in your patients mouth next?
A: large
B: small - ✔✔B: SMALL
✔✔Which of the following would not be a critical item when evaluating a maxillary
impression?
A: hamular notch
B: tuberosity
C: retromolar area
D: palate - ✔✔C: retromolar area
✔✔For a mandibular impression, the correct length of the tray would include:
A: tuberosity
B: retromolar area
C: hamular notch
D: tooth #16 if present - ✔✔B: retromolar area
✔✔The setting time is the time from the start of the mix until the material has set; where
the working time is the time for mixing the alginate, loading the tray and positioning the
tray in the patients mouth.
True
False - ✔✔TRUE
✔✔When selecting a tray for an alginate impression, how much space is sufficient
between the occlusal surface and the tray?
A: 1-2mm
B: 2-3mm
C: 3-6mm
D: 6-7mm - ✔✔B: 2-3mm
,✔✔When mixing alginate impression material, by decreasing the temperature of the
water, you will _____________ your working time.
A: decrease
B: increase - ✔✔B: INCREASE
✔✔If the maxillary tray needs to be extended 2-3mm posteriorly, which of the following
would be used to extend the tray?
A: baseplate wax
B: sticky wax
C: utility wax
D; silicone impression material - ✔✔C: utility wax
✔✔What may occur to your poured up model if you did not remove bioburden from the
impression?
A: the gypsum may not set correctly because the bioburden may interfere with the
setting
B: the gypsum may be biohazard permanently
C: the gypsum will remain runny
D: the gypsum may set too quickly causing bubbles - ✔✔A: the gypsum may not set
correctly because the bioburden may interfere with the setting
✔✔A set of casts are to be mounted (articulated) to show occlusal relationship of the
MX and MN teeth. What is needed to complete this process?
A: bite registration
B: articulating impression
C: bite block
D: articulating paper - ✔✔A: bite registration
✔✔To best record the patients lingual frenum, you should ask the patient to stick their
tongue up and out of their mouth after seating the mandibular tray.
True
False - ✔✔TRUE
✔✔If an alginate impression is submerged in water, it will take in water causing it to
swell thus distorting the impression. This is known as imbibition.
True
False - ✔✔TRUE
✔✔For the dental dam, when punching holes for the maxillary arch, holes should be
punched approximately __________ down from the top of the material.
A: 5 inches
B: 4 inches
C: 3 inches
D: 2 inches
, E: 1 inch - ✔✔E: 1 inch
✔✔You are placing the dental dam clamp for treatment on tooth #14. Which instrument
grasp will you use to place the clamp?
A: thumb-to-nose grasp
B: palm grasp
C: reverse palm grasp
D; Ppalm-thumb grasp - ✔✔C: reverse palm grasp
✔✔For dental dam, when punching holes for mandibular posterior placement, the holes
should be punched _______ from the side of the material.
A: 1 inch
B: 2 inches
C; 3 inches
D: 4 inches - ✔✔B: 2 inches
✔✔You place the rubber dam and notice that there are gaps between the teeth that can
cause materials to leak in and out of the area of isolation. What is the probable cause of
this?
A: either the holes are punched too far apart, or you used too large of a hole on the
dental dam punch
B: holes punched too far apart
C: using too large of a hole on the dental dam punch
D: A & C - ✔✔A: either the holes are punched too far apart, or you used too large of a
hole on the dental dam punch
✔✔For the dental dam clamps, "W" means wingless and "A" means partially erupted.
True
False - ✔✔TRUE
✔✔You are placing a dental dam on an adult patient who is having endodontic
treatment on tooth #19, what size dental dam material are you going to choose?
A: 6x6
B: 5x5
C: 4x4 - ✔✔A: 6x6
✔✔A double bowed clamp is used:
A: for class V restorations
B: to retract the gingiva on facial surfaces of anterior teeth
C: to isolate tooth #8 during endo treatment
D: All of the above - ✔✔D: All of the above
