Endodontics & Conservative Dentistry #3

1. A/An____________ base is a base that is typically placed over a calcium hydroxide base that has been placed over a pulp exposure.

Primary base

Indirect base

Secondary base

Direct base

Question 1 of 20

2. The use of the rubber dam is best indicated for _____.

All of the above

Teeth with challenging preparations

Quadrant dentistry

Difficult patients

Question 2 of 20

3. To avoid pulpal irritation below any restorative material, the minimum thickness of the dentine should be

1.3mm

1.5mm

2 mm

2.5 mm

Question 3 of 20

4. Peeso reamer is used for:

Enlarging apical third of root canal

Remove lingual shoulder

Prepare post space

Remove canal medication

Question 4 of 20

5. When amalgam is polished, the metal crystals at the surface get flattened. The layer is called

Beilby layer

Trilby layer

Dalby layer

Whitby layer

Question 5 of 20

6. Delayed expansion of amalgam restorations is associated with which two factors? 1. Insufficient trituration and condensation 2. High residual mercury 3. The contamination of the amalgam by moisture during trituration and condensation 4. The failure to use a cavity varnish

2 & 3

1 & 3

3 & 4

1 & 2

Question 6 of 20

7. A patient is diagnosed with symptomatic apical periodontitis and refuses treatment due to fear of needles. Your statement to the patient should include the fact that:

None of the above

The apical lesion has been there or years and the tooth needs treatment immediately

Eventually, the acute nature of the lesion will progress into a chronic and nonpainful lesion

This lesion can progress into the bone causing osteomyelitis, a more severe condition

Question 7 of 20

8. When condensing gold foil, stepping of the condenser

Should involve overlapping the nib by one-half its diameter

Should involve overlapping the nib by one-fourth its radius

Produces a denser restoration and reduces the time of condensation

Produces a denser restoration but increases the time of condensation

Question 8 of 20

9. The first number on those instruments having three-number formula, indicates the

Length of the blade in millimetres

Angle of the blade to the shaft in degrees centigrade

Length of the blade in tenths of a millimetre

Width of the blade in tenths of a millimetre

Question 9 of 20

10. Dental plaque adheres to tooth surface by

Sucrose

Bacteria

Dextrose

Epithelial cells

Question 10 of 20

11. According to Kim et al Classification Class III isthmus indicates:

Complete isthmus with two canals with a definite connection between them.

A very short, complete isthmus between two canals.

Incomplete isthmus with a faint communication between two canals.

A complete or incomplete isthmus between three or more canals.

Question 11 of 20

12. Gingival bevels can be safely and accurately placed using

Margin trimmers

Medium sandpaper disks

Safe sided diamond disks

Angle formers

Question 12 of 20

13. When making a diagnosis, the primary goal of your diagnostic tests is to reproduce the chief complaint. You test the suspected tooth for percussion sensitivity and palpation sensitivity. Your positive percussion findings can be interpreted as follows:

There is inflammation in the PDL.

The tooth is nonvital and should be treated with root canal therapy.

There is a root fracture present.

There is inflammation in the PDL and the surrounding periodontium.

Question 13 of 20

14. In a tooth with apical root fracture which of the following is true

Tooth shows increased mobility with tenderness

Tooth remains vital with little increase in mobility

Tooth will necrose and increased mobility

The tooth should be extracted as soon as possible

Question 14 of 20

15. Cavities beginning on the proximal surfaces of premolars and molars are designated as

Class VI

Class IV

Class Ill

Class II

Question 15 of 20

16. Which of the following can be viewed on a conventional radiograph?

Gingival fibers

Periodontal ligament

Buccal curvature of roots

Calcification of canals

Question 16 of 20

17. For a gold casting alloy, which of the following is added primarily to act as a scavenger for oxygen during the casting process?

Copper

Zinc

Silver

Palladium

Question 17 of 20

18. Which type of obturation technique requires heat?

Vertical condensation

MTA obturation

Lateral condensation

Chemically plasticized

Question 18 of 20

19. Buccal cavity of Mandibular canine is to be restored with light cured composite. What should not be done?

Acid etching

Remove soft dentine

Pulp capping

Bevelling of cavity margins

Question 19 of 20

20. When restoring severely broken down teeth, which pins are most retentive?

Frictional

Inlay

Cemented

Threaded

Question 20 of 20