CORRECT ANSWERS|LATEST
Thickness of minor RPD connectors - ANSWER 1.5 mm
Minimum space between vertical components of RPD - ANSWER 5 mm
Kennedy Class I - ANSWER bilateral distal extension
Kennedy Class II - ANSWER unilateral distal extension
Kennedy Class III - ANSWER entirely tooth born with teeth anterior and posterior
Kennedy Class IV - ANSWER edentulous area anterior to remaining teeth
Lingual bar distance from gingival margin - ANSWER 3 mm
Lingual bar width (minimum) - ANSWER 4 mm
Maxillary major connectors, how far from gingival margin - ANSWER 6 mm
Max RPD bead line width and depth - ANSWER .75-1 mm
Anterior-posterior palatal strap, minimum distance between straps and minimum width for
each strap - ANSWER 15 mm between, 6 mm anterior and 8 mm posterior
Palatal plate advised when? - ANSWER The last abutment on either side is a canine or
premolar
,Main function of indirect retainers - ANSWER prevents vertical dislodgement of the
distal extension base away from tissues (sticky food)
Minimum number of rests for RPD - ANSWER 3
For a distal extension where is the rest on the most posterior tooth - ANSWER mesial
Rest seat depth - ANSWER 1.5 mm at marginal ridge and 2 mm in center, at least 2.5 mm
wide
What is prepared first? Guide planes or seats - ANSWER guide planes
Extended occlusal rests used when? - ANSWER used when most posterior molar
abutment is mesially tipped in class II (mod I) and class III
Cingulum rest depths - ANSWER 2 mm wide (F-L), 2.5-3 mm (M-D), 1.5 mm deep
Guide plane position relative to height of contour for classes of RPD - ANSWER Class III
and IV can end above the height of contour because there is no functional movement. Class I
and II must be below the height of contour (to prevent torquing). With I-bars and mesial rests
on premolars, must end exactly at the height of contour.
How to determine number of clasps - ANSWER kennedy classification + 1 (except for
class IV)
Undercut of 0.01 - ANSWER cast clasp
Undercut of 0.02 - ANSWER wrought wire (0.5 mm and must be at least 8 mm long, 18
gauge)
, Chromium provides what - ANSWER corrosion resistance
Cobalt provides what - ANSWER rigidity
Nickel provides what - ANSWER ductility
What muscle dictates the DB of the mand flange of a denture - ANSWER masseter
What muscle dictates the DL of the mand flange of a denture - ANSWER superior
constrictor muscle
How far to trim back the custom tray from the mucosal reflection - ANSWER 2 mm
Occlusion rim heights - ANSWER maxillary 22 mm, mandibular 18 mm
The inferior surface of the maxillary occlusal rim should be parallel to... -
ANSWER Camper's Line (Ala-tragus Line) and inter-pupillary line
Primary and secondary support for mand denture - ANSWER primary - buccal shelf,
secondary - alveolar ridge
Posterior palatal seal - ANSWER extends through the hamular notches, 2 mm in front of
fovea palatinae, carried 5 mm anterior to the vibrating line
If denture falls down when smiling - ANSWER buccal notch and buccal flange are
excessively thick
Golden Proportion Ratio - ANSWER 1.6:1:0.6 (central:lateral:canine)
Thickness of minor RPD connectors - ANSWER 1.5 mm
Minimum space between vertical components of RPD - ANSWER 5 mm
Kennedy Class I - ANSWER bilateral distal extension
Kennedy Class II - ANSWER unilateral distal extension
Kennedy Class III - ANSWER entirely tooth born with teeth anterior and posterior
Kennedy Class IV - ANSWER edentulous area anterior to remaining teeth
Lingual bar distance from gingival margin - ANSWER 3 mm
Lingual bar width (minimum) - ANSWER 4 mm
Maxillary major connectors, how far from gingival margin - ANSWER 6 mm
Max RPD bead line width and depth - ANSWER .75-1 mm
Anterior-posterior palatal strap, minimum distance between straps and minimum width for
each strap - ANSWER 15 mm between, 6 mm anterior and 8 mm posterior
Palatal plate advised when? - ANSWER The last abutment on either side is a canine or
premolar
,Main function of indirect retainers - ANSWER prevents vertical dislodgement of the
distal extension base away from tissues (sticky food)
Minimum number of rests for RPD - ANSWER 3
For a distal extension where is the rest on the most posterior tooth - ANSWER mesial
Rest seat depth - ANSWER 1.5 mm at marginal ridge and 2 mm in center, at least 2.5 mm
wide
What is prepared first? Guide planes or seats - ANSWER guide planes
Extended occlusal rests used when? - ANSWER used when most posterior molar
abutment is mesially tipped in class II (mod I) and class III
Cingulum rest depths - ANSWER 2 mm wide (F-L), 2.5-3 mm (M-D), 1.5 mm deep
Guide plane position relative to height of contour for classes of RPD - ANSWER Class III
and IV can end above the height of contour because there is no functional movement. Class I
and II must be below the height of contour (to prevent torquing). With I-bars and mesial rests
on premolars, must end exactly at the height of contour.
How to determine number of clasps - ANSWER kennedy classification + 1 (except for
class IV)
Undercut of 0.01 - ANSWER cast clasp
Undercut of 0.02 - ANSWER wrought wire (0.5 mm and must be at least 8 mm long, 18
gauge)
, Chromium provides what - ANSWER corrosion resistance
Cobalt provides what - ANSWER rigidity
Nickel provides what - ANSWER ductility
What muscle dictates the DB of the mand flange of a denture - ANSWER masseter
What muscle dictates the DL of the mand flange of a denture - ANSWER superior
constrictor muscle
How far to trim back the custom tray from the mucosal reflection - ANSWER 2 mm
Occlusion rim heights - ANSWER maxillary 22 mm, mandibular 18 mm
The inferior surface of the maxillary occlusal rim should be parallel to... -
ANSWER Camper's Line (Ala-tragus Line) and inter-pupillary line
Primary and secondary support for mand denture - ANSWER primary - buccal shelf,
secondary - alveolar ridge
Posterior palatal seal - ANSWER extends through the hamular notches, 2 mm in front of
fovea palatinae, carried 5 mm anterior to the vibrating line
If denture falls down when smiling - ANSWER buccal notch and buccal flange are
excessively thick
Golden Proportion Ratio - ANSWER 1.6:1:0.6 (central:lateral:canine)
