NBDE EXAM PART 2 -DENTAL DESK-OPERATIVE
QUESTIONS AND ANSWERS
All class III lesions should be filled with composite resin, because they are aesthetically
important - Answers-Neither the statement NOR the reason is correct.
distolingual Class III lesions are relatively nonesthetic and National Board questions
consider the best material whether it be amalgam or direct gold.
.Is composite resin recommended for a class III lesions on the distal-lingual aspect of
canines? - Answers-Is not recommended for a class III. Use either amalgam or direct
gold. Composite material will not maintain the mesio-distal dimension of the tooth.
.Is the best method to diagnose incipient carious lesions on the distal surface of canine
teeth - Answers-bite wing radiograph
.A diagnostic aid to be used as a last resort to confirm the presence of a carious lesion
on the proximal surface of a anterior tooth is - Answers-mechanical separation (usually
with a wedge)
.When two teeth adjacent to each other have a class III lesions, you should prepare the
- Answers-larger one first and fill the smaller on first. Access to the preps and shade
matching are easier when you do both at the same appointment.
.The ideal amount of dentin required between an amalgam restoration and the pulp for
insulation is:
0.5 mm, 1.0 mm, 2.0 mm, 3.0 mm - Answers-Amalgam is poor thermal insulator; this is
why a base of either calcium hydroxide or zinc oxide eugenol is placed under is placed
under most amalgam restorations
.Provide thermal protection under an amalgam restoration - Answers-Calcium hydroxide
or zinc oxide eugenol
.A patient comes in claiming that their holistic doctor told him that he has an allergy to
mercury and needs only white fillings. Your best response is - Answers-You might have
a mercury allergy , but it is very rare. Plus, with proper isolation and technique your
response will be minimal
.The amount of mercury remaining in a set amalgam restoration is related to - Answers-
how much of the mercury rich matrix is left in the amalgam after condensation.
The key is to minimize the amount of matrix which forms during the reaction
.By condensing the amalgam mixture in the cavity preparation, the mercury-rich matrix
will come to - Answers-the surface and be removed by subsequent condensing and
carving
QUESTIONS AND ANSWERS
All class III lesions should be filled with composite resin, because they are aesthetically
important - Answers-Neither the statement NOR the reason is correct.
distolingual Class III lesions are relatively nonesthetic and National Board questions
consider the best material whether it be amalgam or direct gold.
.Is composite resin recommended for a class III lesions on the distal-lingual aspect of
canines? - Answers-Is not recommended for a class III. Use either amalgam or direct
gold. Composite material will not maintain the mesio-distal dimension of the tooth.
.Is the best method to diagnose incipient carious lesions on the distal surface of canine
teeth - Answers-bite wing radiograph
.A diagnostic aid to be used as a last resort to confirm the presence of a carious lesion
on the proximal surface of a anterior tooth is - Answers-mechanical separation (usually
with a wedge)
.When two teeth adjacent to each other have a class III lesions, you should prepare the
- Answers-larger one first and fill the smaller on first. Access to the preps and shade
matching are easier when you do both at the same appointment.
.The ideal amount of dentin required between an amalgam restoration and the pulp for
insulation is:
0.5 mm, 1.0 mm, 2.0 mm, 3.0 mm - Answers-Amalgam is poor thermal insulator; this is
why a base of either calcium hydroxide or zinc oxide eugenol is placed under is placed
under most amalgam restorations
.Provide thermal protection under an amalgam restoration - Answers-Calcium hydroxide
or zinc oxide eugenol
.A patient comes in claiming that their holistic doctor told him that he has an allergy to
mercury and needs only white fillings. Your best response is - Answers-You might have
a mercury allergy , but it is very rare. Plus, with proper isolation and technique your
response will be minimal
.The amount of mercury remaining in a set amalgam restoration is related to - Answers-
how much of the mercury rich matrix is left in the amalgam after condensation.
The key is to minimize the amount of matrix which forms during the reaction
.By condensing the amalgam mixture in the cavity preparation, the mercury-rich matrix
will come to - Answers-the surface and be removed by subsequent condensing and
carving
