Post Graduate prosthodontic MCQ test IV

 

1) The principal function of an indirect retainer is to
a) stabilize against lateral movement.
b) prevent settling of the major connector.
c) minimize movement of the base away from supporting tissue.
d) restrict tissueward movement of the distal extension base of the partial denture.

2) Over extension of a mandibular denture base in distobuccal area will cause dislodgement of the denture during function as the result of the action of the
a) masseter muscle.
b) buccinator muscle.
c) pterygomandibular raphe.
d) lateral tendon of temporalis muscle.

3) A reline for a complete denture is contraindicated when
a) there is extreme overclosure of the vertical diamention.
b) centric occlusion and centric relation do not coincide.
c) the denture contains a broken tooth.
d) there is resorption of the ridge.

4) The most important criterion for a gingival margin on a crown prepration is that
a) it is dull knife edge.
b) its position is subgingival.
c) its position is supragingival.
d) its position be easily discrenible.

5) Placement of maxillary anterior teeth in complete dentures too far superiorly and anteriorly might result in difficulty in pronouncing
a) f and v sounds.
b) d and t sounds.
c) s and thsounds.
d) most vowels.

6) A thin application of cavity varnish over the cut surface of a prepared tooth just prior to the cementation of a crown or a bridge with zinc phosphate cement will
a) impede the seating of the restoration.
b) insulate the tooth against thermal change.
c) increase the possibility of thermal sensitivity.
d) reduce the possibility of irritation of the pulp.

7) Metal-ceramic restorations may fail due to fracture of ceramic material. This can be best be avoided if
a) occlusal forces are minimal.
b) the metal is not over 0.5 mm thick.
c) the ceramic material is at least 1.5 mm thick.
d) the casting is designed to reduce stress concentration in the ceramic material.

8) For a removable partial denture, the lack of indirect retention would be manifested by
a) tissueward movement of the distal extension base of the prosthesis.
b) movement away from the tissue of the extension base of the prosthesis.
c) settling of the major connector of the prosthesis.
d) lateral and medial movement of the extension base of the prosthesis.

9) An advantage of rubber-base impression material over reversible hydrocolloid material is that rubber base impression material
a) will displace soft tissue.
b) requires less armamentarium.
c) is significantly more accurate.
d) is more accurate if saliva, mucous or blood is present.

10) The posterior palatal bar should be placed in a relationship
a) to incorporate the hamular notch on each side.
b) which is anterior to the junction of the movable and immovable soft palate.
c) which is posterior to the junction of the movable and immovable soft palate.
d) extending from one hamular notch to the other hamular notch across the fovea palatinae.
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