Prosth- NBDE II Questions

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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 - Stabi... lization (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 [Show More]

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