Occlusion rim and record base for dentures l removable prosthodontics MCQs for dental students
MCQ on occlusion rim and record base for removable dentures in prosthodontics
1. land area on the cast should be
a. 2:3mm
b. 3:4mm
c. 5:6mm
d. 6:7mm
2. record block is device used for
a. recording jaw relation
b. arrangement of artificial teeth
c. try in
d. all of the above
3. achievement of all requirement of record base is good for accurate
a. try in
b. jaw relation
c. insertion
d. non of the above
4. permanent record base is fabricated from
a. cobalt chromium
b. vacuum formed vinyl
c. visible light cure acrylic
d. shellac base plate
5. stabilized base used for
a. ill fitted temporary base
b. adding thin film of material to be more adapted
c. needed for accurate jaw relation if there is defect in
adaptation
d. all of the above
6. the great disadvantage of using heat cure acrylic resin for record base
a. sever pressure area
b. time consuming
c. high cost
d. dimensional changes that occur with exposure to heat for
two times
7. usage of cast metal denture base with high strength is indicated for
a. well developed ridge
b. V shaped arch
c. prominent median raphe
d. maxillary single denture
8. all of the following are advantage of cast metal record base except
a. increase strength
b. high polishing ,cleaning
c. thermal conductivity
d. easy in repair , relining
9. angle between outer surface and occlusal surface of occlusion rim is
a. rounded 90
b. sharp 90
c. acute angle
d. obtuse angle
10. centralization of occlusion rims over crest of the ridge for denture
a. retention
b. esthetic
c. support
d. stability
11. which of the following rims is used for neutral zone impression technique
a. wax occlusion rim
b. compound occlusion rim
c. plaster and pumic rim
d. silicon rim
12. which of the following rims is used for functional generating pathways of mandibular movement
a. wax occlusion rim
b. compound occlusion rim
c. plaster and pumic rim
13. length of artificial teeth extend from ..........to level of occlusion rim
a. low lip line
b. high lip line
c. level of acrylic resin
d. level of denture border
14. During taking jaw relation what is the patient's position
a) 30 degree head bent
b) Straight
c) Cantomeatal line 45 degree to the floor
d) None of the above
15. occlusal rims are also called
a) Dummy dentures
c) Immediate dentures
b) Trial dentures
d) Overdentures
16. In an edentulous patient the average distance between upper and lower sulcus is
a) 38 mm
b) 40 mm
c) 42 mm
d) 45 mm
17. The height of the lower occlusal rim, when recording VDO in complete denture, in the premolar region should be
a) At the level of lower lip
b) Just below the lower lip
c) 1-2 mm above the lower lip
d) At the level of lower border of the upper lip
18. thickness of base of cast shouldn't be less than
a.12mm
b.11mm
c. 10mm
d. 9mm
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