Design of Tooth Preparations and Restorations (Conservative MCQs)

Design of Tooth Preparations and Restorations (Conservative MCQs)

1. Historically, “Slice preparation” refers to:
A. Placement of intracoronal taper
B. Placement of extracoronal taper
C. Modified flare preparation
D. None of the above

2. The gingival bevel serves which of the following purposes in cast tnetal restoration?
A. Removal of unsupported enamel
B. Burnishable metal margin
C. A lap sliding fit at gingival margin
D. All of the above

3. In cast metal restoration, secondary flare is used to:
A. Place margins into embrasures
B. Make margins more self-cleansing
C. Make enamel margin stronger
D. All of the above

4. A cast metal restoration which is an intracoronal preparation and covers one or more cusps but not all, is:
A. Onlay
B. Inlay
C. Full crown
D. None of the above

5. Which is true about the cast metal /onlay?
A. It is a extracoronal restoration
B. It caps all the cusps of posterior teeth
C. It is between inlay and full crown
D. All of the above

6. If the gingivoocclusal height of the vertical wall of the onlay increases, then the occlusal divergence should:
A. Decrease
B. Increase

7. In cavity preparation for cast metal onlay, counterbevel is not placed on:
A. Facial cusp of maxillary premolars
B. Facial cusp of maxillary 1st molar
C. Both of the above
D. Facial cusp of mandibular 1st molar

8. “Skirt preparation” is thin extension of facial or lingual margins of onlay that usually:
A. Are prepared in dentin
B. Are prepared entirely in enamel
C. Improve both resistance and retention form
D. Both B and C

9. Which of the followings is a disadvantage of “skirt preparation”?
A. It increases the display of metal
B. It reduces resistance and retention form
C. It is prepared on unesthetic region
D. All of the above

10. The beveled margin for gold inlay cavity:
A. Exposes greater cement liner
B. Allows for a thin metal margin which is unable to withstand occlusal load
C. Has no effect on cement liner
D. Reduces amount of exposed cement liner

11. The cavosurface Illargin of gold inlay preparation should be:
A. Feather edge
B. At right angles
C. Chamfer
D. Bevelled

12. Type IV gold alloy is not suitable for a siIllple inlay because:
A. Its hardness is so high that it will cause tooth abrasion
B. It is too ductile and will distort
C. It has poor marginal adaptation
D. None of the above