NBDE Part II Prosthodontics ACTUAL
Exam Questions and CORRECT Answers
Cement for porcelain onlay HAS TO BE - CORRECT ANSWER - RESIN
What parts of tooth prep can be managed by operator:
a) parallelism
b) surface area
c) length
d) circumference - CORRECT ANSWER - a) parallelism
3/4 Gold crown advantageous EXCEPT for: - CORRECT ANSWER - LESS
RETENTION than full crown
Resistance to lingual displacement of 3/4 crown?
a) Facial wall of groove
b) Lingual wall (of groove)
c) Facial aspect of prep - CORRECT ANSWER - b) Lingual wall (of groove)
Patient has a veneer on incisal edge, small piece of porcelain chipped off and wants you to fix the
chip only, what is the sequence of events : - CORRECT ANSWER - 1) microetch/micro
abrasion
2) acid-etch
3) Silante (porcelain tx to help it stick to bonding agent)
4) bonding agent (MAS bonding)
,Porcelain is stronger under what type of forces? - CORRECT ANSWER -
COMPRESSSION Forces
When you receive a crown back and want to seat it what is the first thing you check for?
a) Shade (aesthetics) or internal
b) Proximal contacts
c) Margins - CORRECT ANSWER - b) Proximal contacts
Most common complication of internal bleaching: - CORRECT ANSWER -
Cervical/internal root resorption
also referred to as peripheral inflammatory root resorption. The presence of a barrier (base
material) between the root filling material and the internal bleaching material should be ~4 mm
to prevent this resorption.
Most successful teeth for bleaching? - CORRECT ANSWER - aged yellow staining
Bleach most often used in internal bleaching: - CORRECT ANSWER - Sodium perborate
A fixed partial denture keeps breaking, why? - CORRECT ANSWER - Poor framework
Most esthetic Pontic:
a) Saddle
b) Steins
c) Sanitrary
d) Conical ridge lap
e) Modified ridge lap - CORRECT ANSWER - e) Modified ridge lap
, Patient had veneers cemented with light cured resin. Returns a few weeks later with brown
staining at gingival margins. Why? - CORRECT ANSWER - MICROLEAKAGE
How long after vital tooth bleaching can you bind resin to it?
a) 24 hours
b) 3 days
c) 1 week - CORRECT ANSWER - c) 1 week
Modified ridge lap has what kind of contact? - CORRECT ANSWER - Minimal contact
with residual ridge
How should the modified pontic touch the gum? - CORRECT ANSWER - barely touch it,
rest gently/ should not blanch tissue
A pontic in the bridge shows the metal, why?
a) Under-reduction
b) Framework was not done well - CORRECT ANSWER - b) Framework was not done
well
Which of the following is not ideal abutement-pontic connection?
a) Central incisor-lateral incisor
b) Lateral incisor-central incisor
c) Canine-lateral incisor - CORRECT ANSWER - b) Lateral incisor-central incisor
worst cantilever is lateral abatement with central pontic
Exam Questions and CORRECT Answers
Cement for porcelain onlay HAS TO BE - CORRECT ANSWER - RESIN
What parts of tooth prep can be managed by operator:
a) parallelism
b) surface area
c) length
d) circumference - CORRECT ANSWER - a) parallelism
3/4 Gold crown advantageous EXCEPT for: - CORRECT ANSWER - LESS
RETENTION than full crown
Resistance to lingual displacement of 3/4 crown?
a) Facial wall of groove
b) Lingual wall (of groove)
c) Facial aspect of prep - CORRECT ANSWER - b) Lingual wall (of groove)
Patient has a veneer on incisal edge, small piece of porcelain chipped off and wants you to fix the
chip only, what is the sequence of events : - CORRECT ANSWER - 1) microetch/micro
abrasion
2) acid-etch
3) Silante (porcelain tx to help it stick to bonding agent)
4) bonding agent (MAS bonding)
,Porcelain is stronger under what type of forces? - CORRECT ANSWER -
COMPRESSSION Forces
When you receive a crown back and want to seat it what is the first thing you check for?
a) Shade (aesthetics) or internal
b) Proximal contacts
c) Margins - CORRECT ANSWER - b) Proximal contacts
Most common complication of internal bleaching: - CORRECT ANSWER -
Cervical/internal root resorption
also referred to as peripheral inflammatory root resorption. The presence of a barrier (base
material) between the root filling material and the internal bleaching material should be ~4 mm
to prevent this resorption.
Most successful teeth for bleaching? - CORRECT ANSWER - aged yellow staining
Bleach most often used in internal bleaching: - CORRECT ANSWER - Sodium perborate
A fixed partial denture keeps breaking, why? - CORRECT ANSWER - Poor framework
Most esthetic Pontic:
a) Saddle
b) Steins
c) Sanitrary
d) Conical ridge lap
e) Modified ridge lap - CORRECT ANSWER - e) Modified ridge lap
, Patient had veneers cemented with light cured resin. Returns a few weeks later with brown
staining at gingival margins. Why? - CORRECT ANSWER - MICROLEAKAGE
How long after vital tooth bleaching can you bind resin to it?
a) 24 hours
b) 3 days
c) 1 week - CORRECT ANSWER - c) 1 week
Modified ridge lap has what kind of contact? - CORRECT ANSWER - Minimal contact
with residual ridge
How should the modified pontic touch the gum? - CORRECT ANSWER - barely touch it,
rest gently/ should not blanch tissue
A pontic in the bridge shows the metal, why?
a) Under-reduction
b) Framework was not done well - CORRECT ANSWER - b) Framework was not done
well
Which of the following is not ideal abutement-pontic connection?
a) Central incisor-lateral incisor
b) Lateral incisor-central incisor
c) Canine-lateral incisor - CORRECT ANSWER - b) Lateral incisor-central incisor
worst cantilever is lateral abatement with central pontic
