CDC 4Y051 Set O vol 1- Test Questions
& Answers
1. (022) What technique draws the handpiece water spray across the tooth keeping the tooth cool
and the cavity preparation clear of debris?
a. Aseptic.
b. Washed field.
c. Four-handed dentistry.
d. High volume/low pressure. Correct Ans-b. Washed field
2. (022) What type of pressure do you apply to tissue you are retracting?
a. Light.
b. Very light.
c. Very firm.
d. Firm enough to prevent slippage. Correct Ans-d. Firm enough to prevent slippage
3. (023) To prevent the patient from aspirating or swallowing the rubber dam clamp, you use
a. the rubber dam forceps.
b. the rubber dam frame.
c. the rubber dam.
d. a ligature. Correct Ans-d. a ligature
,4. (023) The rubber dam clamp is placed onto the rubber dam forceps with the bow of the clamp
facing
a. upward and toward the forceps.
b. downward and toward the forceps.
c. upward and away from the forceps.
d. downward and away from the forceps. Correct Ans-c. upward and away from the forceps
5. (023) To invert the rubber dam on the facial and lingual areas of the exposed teeth, you would
use
a. floss.
b. an explorer.
c. a dull instrument.
d. a sharp instrument. Correct Ans-a. floss.
6. (023) When removing the rubber dam, remove the septa by
a. pulling it through the contacts of the teeth.
b. cutting the septum from the lingual and facial aspect.
c. cutting each septum from the facial aspect and pulling the dam lingually.
d. cutting each septum from the lingual aspect and pulling the dam facially. Correct Ans-c.
cutting each septum from the facial aspect and pulling the dam lingually
7. (024) In dentistry, preliminary impressions are used to fabricate
a. crowns, fix partial dentures, removable partial dentures and complete dentures.
,b. study casts, orthodontic casts, custom trays, and mouthguards.
c. only diagnostic and orthodontic casts.
d. only custom trays and mouthguards. Correct Ans-b. study casts, orthodontic casts, custom
trays, and mouthguards
8. (024) What affect does heat have on alginate impression material?
a. Increases expansion.
b. Decreases shrinkage.
c. Accelerates the set.
d. Retards the set. Correct Ans-c. Accelerates the set
9. (024) When making a preliminary impression, patients should be
a. reclined with their head against the headrest and their occlusal plane perpendicular to the floor.
b. upright with their head against the headrest and their occlusal plane parallel to the floor.
c. upright with their occlusal plane perpendicular to the floor.
d. reclined with their occlusal plane parallel to the floor. Correct Ans-b. upright with their
head against the headrest and their occlusal plane parallel to the floor.
10. (024) What instructions do you give to the patient regarding the preliminary impression
procedure?
a. Remove removable dental prosthesis; rinse their mouths with an antiseptic mouth rinse; refrain
from talking; if they are uncomfortable, have them raise a hand to let you know; tilt their heads
forward; and breathe through the nose to prevent gagging.
, b. Remove all dental prosthesis; refrain from talking; if they are uncomfortable, have them raise
a hand to let you know; tilt their heads backwards; and concentrate on breathing through the
mouth to prevent gagging.
c. Remove any removable prosthesis; rinse with an antiseptic mouth rinse; tell you if they are
uncomfortable; tilt their heads upward; and concentrate on breathing through the nose to prevent
gagging.
d. Remove any removable dental prosthesis; if they are uncomfortable, have them raise a hand to
let you know; tilt their heads forward; and concentrate on Correct Ans-a. Remove removable
dental prosthesis; rinse their mouths with an antiseptic mouth rinse; refrain from talking; if they
are uncomfortable, have them raise a hand to let you know; tilt their heads forward; and breathe
through the nose to prevent gagging
91. (024) How much space must be between the rim-lock impression tray and the occlusal or
incisal edges of the teeth?
a. 2 to 3 mm.
b. 4 to 5 mm.
c. 6 to 7 mm.
d. 8 to 10 mm. Correct Ans-a. 2 to 3 mm
92. (024) To remove blood, mucous, and saliva from an alginate impression and ensure good
surface detail, you
a. clean and rinse the impression under cool tap water and shake to remove excess water.
b. submerge the impression in a disinfectant.
c. rinse the impression under warm water.
& Answers
1. (022) What technique draws the handpiece water spray across the tooth keeping the tooth cool
and the cavity preparation clear of debris?
a. Aseptic.
b. Washed field.
c. Four-handed dentistry.
d. High volume/low pressure. Correct Ans-b. Washed field
2. (022) What type of pressure do you apply to tissue you are retracting?
a. Light.
b. Very light.
c. Very firm.
d. Firm enough to prevent slippage. Correct Ans-d. Firm enough to prevent slippage
3. (023) To prevent the patient from aspirating or swallowing the rubber dam clamp, you use
a. the rubber dam forceps.
b. the rubber dam frame.
c. the rubber dam.
d. a ligature. Correct Ans-d. a ligature
,4. (023) The rubber dam clamp is placed onto the rubber dam forceps with the bow of the clamp
facing
a. upward and toward the forceps.
b. downward and toward the forceps.
c. upward and away from the forceps.
d. downward and away from the forceps. Correct Ans-c. upward and away from the forceps
5. (023) To invert the rubber dam on the facial and lingual areas of the exposed teeth, you would
use
a. floss.
b. an explorer.
c. a dull instrument.
d. a sharp instrument. Correct Ans-a. floss.
6. (023) When removing the rubber dam, remove the septa by
a. pulling it through the contacts of the teeth.
b. cutting the septum from the lingual and facial aspect.
c. cutting each septum from the facial aspect and pulling the dam lingually.
d. cutting each septum from the lingual aspect and pulling the dam facially. Correct Ans-c.
cutting each septum from the facial aspect and pulling the dam lingually
7. (024) In dentistry, preliminary impressions are used to fabricate
a. crowns, fix partial dentures, removable partial dentures and complete dentures.
,b. study casts, orthodontic casts, custom trays, and mouthguards.
c. only diagnostic and orthodontic casts.
d. only custom trays and mouthguards. Correct Ans-b. study casts, orthodontic casts, custom
trays, and mouthguards
8. (024) What affect does heat have on alginate impression material?
a. Increases expansion.
b. Decreases shrinkage.
c. Accelerates the set.
d. Retards the set. Correct Ans-c. Accelerates the set
9. (024) When making a preliminary impression, patients should be
a. reclined with their head against the headrest and their occlusal plane perpendicular to the floor.
b. upright with their head against the headrest and their occlusal plane parallel to the floor.
c. upright with their occlusal plane perpendicular to the floor.
d. reclined with their occlusal plane parallel to the floor. Correct Ans-b. upright with their
head against the headrest and their occlusal plane parallel to the floor.
10. (024) What instructions do you give to the patient regarding the preliminary impression
procedure?
a. Remove removable dental prosthesis; rinse their mouths with an antiseptic mouth rinse; refrain
from talking; if they are uncomfortable, have them raise a hand to let you know; tilt their heads
forward; and breathe through the nose to prevent gagging.
, b. Remove all dental prosthesis; refrain from talking; if they are uncomfortable, have them raise
a hand to let you know; tilt their heads backwards; and concentrate on breathing through the
mouth to prevent gagging.
c. Remove any removable prosthesis; rinse with an antiseptic mouth rinse; tell you if they are
uncomfortable; tilt their heads upward; and concentrate on breathing through the nose to prevent
gagging.
d. Remove any removable dental prosthesis; if they are uncomfortable, have them raise a hand to
let you know; tilt their heads forward; and concentrate on Correct Ans-a. Remove removable
dental prosthesis; rinse their mouths with an antiseptic mouth rinse; refrain from talking; if they
are uncomfortable, have them raise a hand to let you know; tilt their heads forward; and breathe
through the nose to prevent gagging
91. (024) How much space must be between the rim-lock impression tray and the occlusal or
incisal edges of the teeth?
a. 2 to 3 mm.
b. 4 to 5 mm.
c. 6 to 7 mm.
d. 8 to 10 mm. Correct Ans-a. 2 to 3 mm
92. (024) To remove blood, mucous, and saliva from an alginate impression and ensure good
surface detail, you
a. clean and rinse the impression under cool tap water and shake to remove excess water.
b. submerge the impression in a disinfectant.
c. rinse the impression under warm water.
