5. 2:45-3:45pm Pre-exam Partial Denture (3dda MCQs 406 I Sok Ly)

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5. 2:45-3:45pm Pre-exam Partial Denture (3dda MCQs 406 I Sok Ly) - Quiz

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Questions and Answers
  • 1. 
    A clasp most common use is?:
    • A. 

      Aker clasp

    • B. 

      Ring clasp

    • C. 

      Back action clasp

    • D. 

      Embrasure

  • 2. 
    Infrabulge clasps originate:
    • A. 

      Below the height of contour

    • B. 

      Above the 12mm undercut areas

    • C. 

      Above the occlusal surface of most premolars

    • D. 

      Above the height of contour

  • 3. 
    Reciprocation between bracing and retentive components requires:
    • A. 

      Correct timing of contact during seating and removed of RPD

    • B. 

      I bars be used

    • C. 

      Aker clasp be used

    • D. 

      Bracing components contacts after retentive components

  • 4. 
    The basic movement of mandible:
    • A. 

      hinge ,lateral and translatory movement

    • B. 

      Hinge movement

    • C. 

      Translatory movement

    • D. 

      Lateral movement

  • 5. 
    Maxillary major connectors most common use is:
    • A. 

      Anterior posterior palatal strap

    • B. 

      Full palatal strap

    • C. 

      Palatal strap

    • D. 

      Anterior palatal strap

  • 6. 
    Anterior posterior palatal strap especially use is:
    • A. 

      Torus palatal

    • B. 

      Maximum rigidity

    • C. 

      Minimum bulk

    • D. 

      Use in most cases

  • 7. 
    Which of the following maxillary major connectors possesses the least strength and rigidity?:
    • A. 

      Horse –shoe

    • B. 

      Anterior posterior palatal strap

    • C. 

      Palatal plate

    • D. 

      Modified palatal strap

  • 8. 
    Which of the following clasps commonly utilize lingual undercut?:
    • A. 

      Ring clasp

    • B. 

      Extended arm clasp

    • C. 

      Back action clasp

    • D. 

      Embrasure clasp

  • 9. 
    The external finish line is:
    • A. 

      The external of framework metal and denture base plastic

    • B. 

      The external of framework metal and supporting tissues

    • C. 

      The external of framework metal and the natural teeth

    • D. 

      The external of the natural teeth and the denture base plastic

  • 10. 
    Functions of a Major connector:
    • A. 

      Unification, stress distribution, cross arch stabilization

    • B. 

      Component of RPD connect to acrylic resin

    • C. 

      Kind of metal chrome cobalt

    • D. 

      Functions as one unit

  • 11. 
    Requirements of a Major connector:
    • A. 

      Rigidity, non interference with tissues, minimize food impaction and unobtrusive

    • B. 

      Connects various parts

    • C. 

      Distributes functional loads to both teeth and mucosa

    • D. 

      Partial denture acts as one unit

  • 12. 
    The superior border of mandibular lingual bar major connector should be:
    • A. 

      At least 3mm from the tooth/ tissue junction

    • B. 

      At least 3mm from the tooth/ junction

    • C. 

      As far from gingival margin as possible

    • D. 

      At least 3mm above the tooth/ junction

  • 13. 
    The internal finish line is:
    • A. 

      The butt joint between the metal and resin acrylic on the tissue side of the edentulous area

    • B. 

      The butt joint between the metal and resin acrylic on the outer surface of the RPD

    • C. 

      A type of posterior palatal seal

    • D. 

      A special type of above

  • 14. 
    A combination clasp assembly generally has:
    • A. 

      A bracing arm , a retentive arm and rests

    • B. 

      A retentive arm ,rests and indirect retainer

    • C. 

      Rests, a retentive arm and proximal plate

    • D. 

      Rests , a bracing arm and proximal plate

  • 15. 
    The external finish line on a maxillary class 1 RPD originates from the lingual of the guide plane of the terminal abutment and ends:
    • A. 

      At the hamular notch

    • B. 

      In the glenoid fossa

    • C. 

      Opposite the buccal pouch

    • D. 

      Opposite stenon’s duct

  • 16. 
    The Gridwork of Minor Connector on a maxillary class 1 RPD:
    • A. 

      Does not cover the tuberosity

    • B. 

      Covers the hamular notch

    • C. 

      Covers the tuberosity

    • D. 

      Covers the crest and tuberosity

  • 17. 
    Occlusal rest preparation should be:
    • A. 

      Spoon shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1m deep

    • B. 

      Flat shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1mm deep

    • C. 

      Pear shaped, at least 1/2 the bucco lingual width of the occlusal surface, at least 15mm deep

    • D. 

      Teardrop shaped, at least 1/2 the bucco lingual width of the occlusal surface, at least 15mm deep

  • 18. 
    A lingual plate major connector may be selected be cause
    • A. 

      The mandibular incisors are tilted lingually, mandibular tori present, high lingual frenum

    • B. 

      The mandibular incisors are tilted facially, high floor of the mouth

    • C. 

      The mandibular incisors are tilted facially, mandibular tori present ,high lingual fremum

    • D. 

      The mandibular incisors are tilted lingually ,high floor of the mouth, high lingual frenum

  • 19. 
    An anterior posterior palatal strap major connector is less rigid than a horseshoe major connector because it (the AP strap) has less width:
    • A. 

      The first statement is false but the reason is true

    • B. 

      The first statement is true but the reason is false

    • C. 

      The first statement is false and the reason is also false

    • D. 

      The first statement is true and the reason is true

  • 20. 
    In a circumferential clasp assembly, the arms may extend into an undercut:
    • A. 

      The retentive arm

    • B. 

      The bracing arm

    • C. 

      The reciprocating arm and retentive arm

    • D. 

      The bracing arm and retentive arm

  • 21. 
    Which of the following steps is done LAST ?:
    • A. 

      Centric relation records

    • B. 

      Rest preparation

    • C. 

      Framework try in

    • D. 

      Altered cast impression

  • 22. 
    Direct retainer (clasps):
    • A. 

      Help stabilize the RPD by controlling occlusal movement

    • B. 

      Help stabilize the RPD by controlling gingival movement

    • C. 

      May also function as indirect retainers

    • D. 

      Prevent excessive biting forces on the abutment

  • 23. 
    What are the indications for a linguo plate as a major connector for a mandibular RPD?:
    • A. 

      High floor of the mouth, high lingual frenum, lingual tori

    • B. 

      Present high floor of the mouth and facially anterior teeth

    • C. 

      Present high lingual frenum and buccally anterior teeth

    • D. 

      Present lingual tori and big tongue

  • 24. 
    Incisal rests should generally not used on maxillary incisors Why?:
    • A. 

      Poor esthetics and interferences with opposing occlusion

    • B. 

      For mandibular class 4 kennedy only

    • C. 

      For maxillary class 4 kennedy only

    • D. 

      For maxillary and mandibular class 1 and 2 kennedy

  • 25. 
    Component of a clasp assembly are:
    • A. 

      One or two rests, a retentive arm, a bracing or reciprocating element, one minor connectors, one major connector

    • B. 

      One rest, a retentive arm , a bracing or reciprocating element, one minor connector

    • C. 

      One minor connector, one major connector, one rest, two rests, one retentive arm, one bracing arm

    • D. 

      Two minor connectors, one major connector , one rest, one retentive arm, one bracing or reciprocating element

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