DASLE Review Exam Questions and Answers All Correct 2024 New Update
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Course
DASLE
Institution
DASLE
DASLE Review Exam Questions and Answers All Correct 2024 New Update
What are the three classifications of impressions used in dentistry?
A. Prospective, retrospective, and introspective
B. Preliminary, functional, and occlusal, or bite, registration
C. Preliminary, final, and occlusal, or bite...
DASLE Review Exam Questions
and Answers All Correct 2024 New
Update
What are the three classifications of impressions used in dentistry?
A. Prospective, retrospective, and introspective
B. Preliminary, functional, and occlusal, or bite, registration
C. Preliminary, final, and occlusal, or bite, registration
D. Diagnostic, functional, and determinative - Answer- C. Preliminary, final, and
occlusal, or bite, registration
Why would a dentist request preliminary impressions?
A. To fabricate custom trays
B. To create a working model for indirect restoration
C. To wax up for partial or full dentures
D. To construct implant crowns - Answer- A. To fabricate custom trays
Legally, who can take final impressions?
A. Dentist
B. Dental hygienist
C. Dental assistant
D. Laboratory technician - Answer- A. Dentist
An impression tray should be sufficiently deep to allow _____ mm of material between
the tray and the incisal or occlusal edges of the teeth.
A. 0.5 to 1
B. 2 to 3
C. 4 to 5
D. 6 to 7 - Answer- B. 2 to 3
Which statement is correct regarding custom impression trays?
A. They are made from a preliminary model after the dentist has prepared the teeth.
B. They can be constructed from resin.
C. They are available only as full-arch trays.
D. They do not require adhesive if they are smooth surface. - Answer- B. They can be
constructed from resin.
Which irreversible hydrocolloid material is used most widely for preliminary
impressions?
,A. Light-bodied
B. Alginate
C. Polysulfide
D. Polyether - Answer- B. Alginate
Alginate impressions must be poured within _____ so that distortion does not occur.
A. 5 minutes
B. 30 minutes
C. 1 hour
D. 24 hours - Answer- C. 1 hour
What term is used when an alginate impression takes up water either from soaking or
wrapping in a wet paper towel?
A. Syneresis
B. Imbibition
C. Tempering
D. Viscosity - Answer- B. Imbibition
Which type of impression tray covers only half of a dental arch?
A. Full-arch
B. Section
C. Quadrant
D. Custom - Answer- C. Quadrant
How can length or depth of the alginate impression tray borders be extended?
A.Utility wax
B. Acrylic
C. Boxing wax
D. Border molding compound - Answer- A.Utility wax
Which type of impression is taken to produce a reproduction of the occlusal relationship
of the maxilla and mandible teeth when in centric occlusion?
A. Final
B. Preliminary
C. Bite registration
D. Articulated - Answer- C. Bite registration
Which of the following is an acceptable method for altering the setting time of alginate
irreversible hydrocolloid impression material?
A. Increase or decrease the water-to-powder ratio.
B. Change the water temperature.
C. Add a colloidal material to the alginate.
D. Use potassium chloride as an accelerator. - Answer- B. Change the water
temperature.
,Which impression material is used when an extremely accurate final impression is
essential?
A. Elastomeric
B. Alginate
C. Reversible hydrocolloid
D. Light-cured - Answer- A. Elastomeric
Which type of elastomeric material has the highest viscosity?
A. Light-bodied
B. Regular-bodied
C. Heavy-bodied
D. Putty - Answer- D. Putty
Which of the following is not true regarding an automix system?
A. Elastomeric impression materials are automatically mixed and dispensed via an
extruder.
B. The unit can be used with light-bodied material only.
C. It provides appropriate amount of material without waste.
D. Both b and c. - Answer- B. The unit can be used with light-bodied material only.
Which of the four types of elastomeric materials has the best dimensional stability?
A. Polysulfide
B. Polyether
C. Condensation silicone
D. Polysiloxane - Answer- D. Polysiloxane
Which material is the most durable for occlusal bite registrations?
A. Softened baseplate wax
B. Polysiloxane
C. Zinc oxide-eugenol (ZOE)
D. Polyether impression material - Answer- C. Zinc oxide-eugenol (ZOE)
Which of the following is not considered a classification of impression materials?
A. Preliminary
B. Final
C. Temporary
D. Occlusal - Answer- C. Temporary
What are preliminary impressions used to make?
A. Diagnostic models
B. Provisional coverage
C. Orthodontic appliances
D. All of the above - Answer- D. All of the above
Why must impression trays be rigid?
A. Support the material in the patient's mouth.
, B. Warp the completed impression.
C. Both a and b are correct.
D. Neither are correct. - Answer- A. Support the material in the patient's mouth.
What are the three curing stages of impression materials?
A. First impression, setting phase, final impression
B. Initial set, final set, final cure
C. Initial impression, curing stage, final impression
D. First set, curing set, final set - Answer- B. Initial set, final set, final cure
What is the purpose of the potassium alginate in impression alginate?
A. It slows set time.
B. It adds bulk to the material.
C. It accelerates set time.
D. It thickens the material. - Answer- D. It thickens the material.
How will a water temperature of 80° F (26.6° C) affect an alginate mix?
A. It will make the mix set faster.
B. It will not change the setting time.
C. It will make the mix set slower.
D. It will render the mix useless. - Answer- A. It will make the mix set faster.
What does the term syneresis mean as it relates to alginate impression?
A. Water evaporates from the impression.
B. The mix changes colors.
C. Excess moisture is absorbed by the impression.
D. The mixing time is increased. - Answer- A. Water evaporates from the impression.
How is an alginate impression disinfected?
A. Spray the alginate with glutaraldehyde.
B. Submerse it in disinfecting solution overnight.
C. Wet it with isopropyl alcohol.
D. Spray the alginate with an intermediate-level disinfectant. - Answer- D. Spray the
alginate with an intermediate-level disinfectant.
How are alginate impressions removed from the mouth?
A. Use a gentle rocking movement.
B. Use one quick, snap-out motion.
C. Twist the tray sideways.
D. Use a vigorous back-and-forth action. - Answer- B. Use one quick, snap-out motion.
Which portion of the maxillary impression tray should be seated in the mouth first?
A. Anterior
B. Posterior
C. Right side
D. Left side - Answer- B. Posterior
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