Prosth- NBDE II Questions
PURPOSE of major connector? - ANS - Rigidity (support) and stability
REQUIREMENT of major connector? - ANS - Rigidity (support)
PURPOSE of reciprocating arm? - ANS - Stabilization (counteract
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Prosth- NBDE II Questions
PURPOSE of major connector? - ANS - Rigidity (support) and stability
REQUIREMENT of major connector? - ANS - Rigidity (support)
PURPOSE of reciprocating arm? - ANS - Stabilization (counteract retentive clasp)
Retentive clasp engages?
-not made out of? - ANS - UNDERCUT BELOW height of contour-suprabulge
-Retentive clasp is not base metal alloy
Reciprocal clasp engages? - ANS - PASSIVELY ABOVE height of contour
Reciprocal arm acts as an? - ANS - Indirect retainer, stabilized aginast horizontal movements
Which part of the RPD is NOT a base metal - ANS - Retentive clasp
FUNCTION of rest seat? - ANS - Support
-resists VERTICAL tissue force and prevent displacement
-(to provide vertical support)
Purpose of indirect retainer? - ANS - Prevent distal extension from lifting
-located on opposite side of the fulcrum line . assists direct retainer to prevent displacement of
denture base in an off oclusal direction
Indriect retainer is located? - ANS - opposite side of fulcrum line
FUNCTION of minor connector? - ANS - Stability
Buccal flange of max denture provides? - ANS - Stability
No effect on clasp flexibility?
Metal, width, length, Undercut - ANS - Undercut
Most important in denture retention? - ANS - Tissue contact (peripheral seal)
Retention/stress bearing area for mandibular denture? - ANS - 1. Buccal shelf 2. anterior lingual
border
Support for maxillary denture? - ANS - 1. Alveolar Ridge 2. Rugae
Main area of support for distal extension RPD? - ANS - Ridge
Support for mandibular denture? - ANS - mand: buccal shelf, 2nd-anterior lingual border
Indicator for success of denture is? - ANS - Quality of alveolar ridge
Primary stability for an edentulous CD on maxillary? - ANS - Palate and residual ridges
Combination clasp definition? - ANS - Cast reciprocal arm and Wrought Wire retentive clasp
What connects major connector w/ rest seats? - ANS - Minor connector
What do you need for bilateral distal extension? - ANS - Indirect retainer because supported by
tissue
How far to extend a complete denture? - ANS - Hamular notch
Post extension of palatal seal is located where? Anterior extension - ANS - 2mm past vibrating
line, anterior is distal of hard palate (blow line).
When placing palatal seal look for? - ANS - Vibrating line, throat configuration, fovea location,
tissue type
Why provide postpalatal seal in max CD?
A. errors in fabrication.
B. tissue displacement.
C. polymerization and cooling shrinkage.
D. deformation of the impression material. - ANS - Polymerization shrinkage
-compensates for polymerization and
cooling shrinkage.
Excessive depth of posterior palatal seal results in
A. unseating of the denture.
B. a tingling sensation.
C. greater retention.
D. increased gagging. - ANS - Unseating of denture
If palatal vault is too deep, where is vibrating line? - ANS - Vibrating line is more pronounced
and forward
Why remove palatine tori? - ANS - To increase peripheral seal and if they are anterior to
vibrating line
-interferes with posterior palatal seal
If palatine tori extend to soft palate, what design? - ANS - Horseshoe
-also for a large inoperable palatal torus
Reason for splint in palatal torus removal? - ANS - splint because helps stop HEMATOMA
prevent infxn, flap necrosis, hematoma formation
Lingual nerve injury CAN occur if? - ANS - L
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