NBDE II: Prosth (Rest, Proximal Plates, Clasp Design)
UPDATED ACTUAL Questions and CORRECT Answers
A denture that has an indirect retainer that is A RELINE
depressed in the distal extensions indicates
there is significant bone loss and that this
requires what procedure?
A patient has an upper CD and lower RPD, Relieve the mandibular RPD frame first
he needs a reline so how would you
approach this? - Lower teeth help to est the correct VDO during the reline
because its form and position do not change unlike the upper
residual ridge with bone loss.
In surveying, what are the tripod marks for? To keep record of casts in relation to the surveyor and path of
insertion
Occlusal rest is ____ the M/D width of the 1/3
tooth
-Some say 1/3 F/L tooth width so wing it (1/3-1/2 if they ask
about F/L)
Occlusal rest is ____ intercuspal width of the 1/2
tooth
-Some say 1/3 F/L tooth width so wing it (1/3-1/2 if they ask
about F/L)
, Occlusal rest depth 2mm in the center (at least 1.5 mm)
Outline form of occlusal rest Rounded triangle with apex toward the center of the occlsual
surface; concave (spoon shaped)
Depth of rest for base metal 1.5mm
T/F: Occlusal rest is always prepared after True
the proximal guide plates
Guide planes, HOC, retention (undercuts), then rests
Where to place the cingulum rest Junction of gingival and middle 1/3 of lingual surface; rounded
inverted 'V'
Which rest is the least esthetic and most Incisal rest
likely to cause ortho movement?
Metal plate that contacts proximal surface Proximal plate
of abutment tooth
Flat parallel surface of abut teeth that Guide planes
provide a positive path of insertion and
removal
Guiding planes ensure predictable Retention
clasp_______
Guide planes are located how far down 2-3 mm
from the marginal ridge?
UPDATED ACTUAL Questions and CORRECT Answers
A denture that has an indirect retainer that is A RELINE
depressed in the distal extensions indicates
there is significant bone loss and that this
requires what procedure?
A patient has an upper CD and lower RPD, Relieve the mandibular RPD frame first
he needs a reline so how would you
approach this? - Lower teeth help to est the correct VDO during the reline
because its form and position do not change unlike the upper
residual ridge with bone loss.
In surveying, what are the tripod marks for? To keep record of casts in relation to the surveyor and path of
insertion
Occlusal rest is ____ the M/D width of the 1/3
tooth
-Some say 1/3 F/L tooth width so wing it (1/3-1/2 if they ask
about F/L)
Occlusal rest is ____ intercuspal width of the 1/2
tooth
-Some say 1/3 F/L tooth width so wing it (1/3-1/2 if they ask
about F/L)
, Occlusal rest depth 2mm in the center (at least 1.5 mm)
Outline form of occlusal rest Rounded triangle with apex toward the center of the occlsual
surface; concave (spoon shaped)
Depth of rest for base metal 1.5mm
T/F: Occlusal rest is always prepared after True
the proximal guide plates
Guide planes, HOC, retention (undercuts), then rests
Where to place the cingulum rest Junction of gingival and middle 1/3 of lingual surface; rounded
inverted 'V'
Which rest is the least esthetic and most Incisal rest
likely to cause ortho movement?
Metal plate that contacts proximal surface Proximal plate
of abutment tooth
Flat parallel surface of abut teeth that Guide planes
provide a positive path of insertion and
removal
Guiding planes ensure predictable Retention
clasp_______
Guide planes are located how far down 2-3 mm
from the marginal ridge?
