Endodontics & Conservative Dentistry #6

1. How should a vital second permanent molar with a 2.0-mm exposure on a 12-year-old patient be treated?

Apexification

Indirect pulp capping

Direct pulp capping

Apexogenesis

Question 1 of 20

2. Incision for drainage will release exudates from a soft tissue swelling, reducing irritants and pain from pressure buildup. What are the ideal conditions under which to perform an incision for drainage?

A necrotic tooth with a fluctuant swelling at the apex

A necrotic tooth with an indurated swelling at the apex

A tooth with irreversible pulpitis and pain on percussion

A tooth with reversible pulpitis and pain on mastication

Question 2 of 20

3. The reason to invert a rubber dam is _____.

To prevent the underlying gingival from accidental trauma

To provide a complete seal around the teeth

All of above

To prevent the dam from tearing

Question 3 of 20

4. Micro abrasion using modified Croll technique utilizes:

37% Phosphoric Acid

10% HCL

5 % HF

18% Citric acid

Question 4 of 20

5. Apicoectomy of apical 3mm of the root removes successfully what Percentage of apical ramifications

0.93

0.95

0.98

0.86

Question 5 of 20

6. Distance of the blade from the shank to have anti-rotational design of instrument should be

2 mm

4 mm

3 mm

5 mm

Question 6 of 20

7. Wedge wedge technique is indicated in cases of:

Depression of interdental papilla

Concavity on the proximal root surface

Gingival recession

Loose contacts

Question 7 of 20

8. Which of the following statements best describes treatment options for a separated instrument at the initial stage of cleaning and

Stop canal instrumentation, do not attempt removal, and obturate.

Both A and C are options.

Immediate attempt to remove the instrument.

Attempt to bypass the obstructed instrument.

Question 8 of 20

9. Pu1pal medication and thermal protection is given

Solution liner (2-50um)

Cement liner (0.2-1mm)

Suspension liner (20-25um)

Cement base (1-2mm)

Question 9 of 20

10. Root canal therapy is completed on a mandibular first molar and closed temporarily with a cotton pellet and a temporary sealing material, withplans for a definitive restoration to be placed as soon as possible. What is the most important factor in ensuring the success of the procedure?

Marginal integrity of definitive restoration

Type of definitive restoration

Placement of a post

Type of temporary sealing material

Question 10 of 20

11. The material which is not as hard as the others, (lowest KHN) is

Silicate

Zinc phosphate cement

Composite resin

Dentin

Question 11 of 20

12. According to ADA specifications, ISO #2 endodontic instruments

Constant taper of 0.02mm/mm across the length

Instruments with cutting tip

Variable taper instrument across the length

2 variable tapers across the length of the instrument

Question 12 of 20

13. While using Kalzinol as a temporary cement, what should be the thickness of material

3 mm

4 mm

1mm

2 mm

Question 13 of 20

14. In periapical lesions, suppressor T cells are associated with

acute (developing) lesions.

healing lesions.

chronic lesions.

foreign-body lesions.

Question 14 of 20

15. Which of the following tests is the least useful in endodontic diagnosis of children?

Palpation

Cold test

Percussion

Electric pulp test

Question 15 of 20

16. Due to slowly advancing caries involving dentin, which of the following type of dentin may form in response

Secondary

Sclerotic

Tertiary

Reparative

Question 16 of 20

17. A tooth which has been acid etched gets contaminated by hand piece oil What should be done:

Wash with distilled water, dry and bond

Wash with water, 10 sec re-etch and bond

Wash with alcohol, dry and bond

Wash with sodium hypochlorite and bond

Question 17 of 20

18. Cells found predominantly in apical part of necrosed pulp with incomplete root formation:

Multipotent stem cells

Odontoblasts

Neutrophils

Lymphocytes

Question 18 of 20

19. A dentin conditioner

Removes the smear layer

Thinly coats the collagen fibrils with resin

Raises surface free energy of dentin

Bonds the composite

Question 19 of 20

20. A casting may fail to seat on the prepared tooth due to all of the following factors except _____.

Undercuts present in prepared tooth.

Temporary cement still on the prepared tooth after the temporary restoration has been removed.

The occlusal of the prepared tooth was under reduced.

Proximal contact(s) of casting are too heavy or too tight.

Question 20 of 20