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CR1 exam questions newest version
1. An access cavity is created in a posterior tooth by:
A.
Using a round bur and placing it in the central fossa and
penetrating the roof of the chamber
B. Using a round bur and drilling between the marginal ridges
C. Funneling the walls of the cavity
D.
Using a round bur, penetrating and removing the roof of the
chamber and funneling from that point to the height of the
cuspal inclines
E.
Using a fissure bur: D
2.
The properly designed access cavity is:
A. One where all walls converge in the direction of the canals
B. One where the buccal/labial wall diverges and the palatal/lingual
is at right
angles to the floor of the chamber
C. One where all walls diverge from the floor of the chamber to the
height of
the cuspal incline
D. One where the pulp horns are exposed
E.
One where the walls are parallel to each other:
C
3. In a posterior tooth, if the access is extended to the height of
the cuspal
inclines one can be certain that the:
A. Tooth has not been undermined
B. Only the lingual wall will have been undermined
C. Buccal wall will undermined
D. Pulp horns have been included
E.
Mesial and distal walls will have been undermined: D
4.
In a correctly designed access cavity, the enamel:dentin ratio at
the cervix, as compared to the ratio prior to the preparation, will
be:
A. The dentin thickness equals that of the enamel
