OSCE FINAL EXAM GUIDE
2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
thickness of minor RPD connectors - 1.5 mm
Minimum space between vertical components of RPD - 5 mm
Kennedy Class I - bilateral distal extension
Kennedy Class II - unilateral distal extension
Kennedy Class III - entirely tooth born with teeth anterior and posterior
Kennedy Class IV - edentulous area anterior to remaining teeth
Lingual bar distance from gingival margin - 3 mm
Lingual bar width (minimum) - 4 mm
Maxillary major connectors, how far from gingival margin - 6 mm
Max RPD bead line width and depth - .75-1 mm
Anterior-posterior palatal strap, minimum distance between straps and minimum width for
each strap - 15 mm between, 6 mm anterior and 8 mm posterior
Palatal plate advised when? - The last abutment on either side is a canine or premolar
Main function of indirect retainers - prevents vertical dislodgement of the distal
extension base away from tissues (sticky food)
Minimum number of rests for RPD - 3
For a distal extension where is the rest on the most posterior tooth - mesial
rest seat depth - 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 - guide planes
extended occlusal rests used when? - used when most posterior molar abutment is
mesially tipped in class II (mod I) and class III
Cingulum rest depths - 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 - 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 - kennedy classification + 1 (except for class IV)
Undercut of 0.01 - cast clasp
Undercut of 0.02 - wrought wire (0.5 mm and must be at least 8 mm long, 18 gauge)
chromium provides what - corrosion resistance
cobalt provides what - rigidity
Nickel provides what - ductility
What muscle dictates the DB of the mand flange of a denture - masseter
What muscle dictates the DL of the mand flange of a denture - superior constrictor
muscle
how far to trim back the custom tray from the mucosal reflection - 2 mm
occlusion rim heights - maxillary 22 mm, mandibular 18 mm
The inferior surface of the maxillary occlusal rim should be parallel to... - Camper's Line
(Ala-tragus Line) and inter-pupillary line
primary and secondary support for mand denture - primary - buccal shelf, secondary -
alveolar ridge
Posterior palatal seal - 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 - buccal notch and buccal flange are excessively thick
Golden Proportion Ratio - 1.6:1:0.6 (central:lateral:canine)
2025
|MOST COMMON QUESTIONS WITH CORRECTLY
VERIFIED ANSWERS|ALREADY A+
GRADED|GUARANTEED PASS
thickness of minor RPD connectors - 1.5 mm
Minimum space between vertical components of RPD - 5 mm
Kennedy Class I - bilateral distal extension
Kennedy Class II - unilateral distal extension
Kennedy Class III - entirely tooth born with teeth anterior and posterior
Kennedy Class IV - edentulous area anterior to remaining teeth
Lingual bar distance from gingival margin - 3 mm
Lingual bar width (minimum) - 4 mm
Maxillary major connectors, how far from gingival margin - 6 mm
Max RPD bead line width and depth - .75-1 mm
Anterior-posterior palatal strap, minimum distance between straps and minimum width for
each strap - 15 mm between, 6 mm anterior and 8 mm posterior
Palatal plate advised when? - The last abutment on either side is a canine or premolar
Main function of indirect retainers - prevents vertical dislodgement of the distal
extension base away from tissues (sticky food)
Minimum number of rests for RPD - 3
For a distal extension where is the rest on the most posterior tooth - mesial
rest seat depth - 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 - guide planes
extended occlusal rests used when? - used when most posterior molar abutment is
mesially tipped in class II (mod I) and class III
Cingulum rest depths - 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 - 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 - kennedy classification + 1 (except for class IV)
Undercut of 0.01 - cast clasp
Undercut of 0.02 - wrought wire (0.5 mm and must be at least 8 mm long, 18 gauge)
chromium provides what - corrosion resistance
cobalt provides what - rigidity
Nickel provides what - ductility
What muscle dictates the DB of the mand flange of a denture - masseter
What muscle dictates the DL of the mand flange of a denture - superior constrictor
muscle
how far to trim back the custom tray from the mucosal reflection - 2 mm
occlusion rim heights - maxillary 22 mm, mandibular 18 mm
The inferior surface of the maxillary occlusal rim should be parallel to... - Camper's Line
(Ala-tragus Line) and inter-pupillary line
primary and secondary support for mand denture - primary - buccal shelf, secondary -
alveolar ridge
Posterior palatal seal - 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 - buccal notch and buccal flange are excessively thick
Golden Proportion Ratio - 1.6:1:0.6 (central:lateral:canine)
