Endodontics & Conservative Dentistry #13

1. Ideal property of a root canal sealer is:

Extrudes beyond the apical foramen.

Circular in morphology.

Fill the space between solid core material and pulp canal

Seals and fills lateral canal

Question 1 of 20

2. The main purpose of finishing the enamel wall of a prepared cavity is to

Prevent microleakage

Smoothen the walls of the cavity to permit accurate adaptation of the restorative material

Remove loose enamel rods

Ensure parallelism of the walls

Question 2 of 20

3. Pre carve burnishing useful for all except:

Removes excess mercury

Increases setting time

Initiates carving

Better condensation of amalgam at margins of restoration

Question 3 of 20

4. When placement of proximal retention locks in Class II amalgam preparations is necessary, which of the following is incorrect?

Even if deeper than ideal, one should use the axial wall as a guide for proximal lock placement.

One should not prepare locks entirely in the axial wall.

One should place locks 0.2 mm inside the DEJ to ensure that the proximal enamel is not undermined.

One should not undermine the proximal enamel.

Question 4 of 20

5. The Highest concentration of mercury in a polished amalgam restoration, is in the

Centre of the restoration

Equally distributed all around

Pulpal areas

Marginal areas

Question 5 of 20

6. The earliest and most common symptom associated with an inflamed pulp is:

A dull throbbing pain on mastication

Pain on percussion

A persistent feeling of discomfort

Sensitivity to hot and/or cold stimuli

Question 6 of 20

7. Which of the following are NOT found in the pulp?

Proprioceptor nerve fibers

Unmyelinated nerve fibers

Myelinated nerve fibers

Reticulin fibers

Question 7 of 20

8. Rool-filling materials must be

low cost.

easily dissolved.

rigid.

biocompatible.

Question 8 of 20

9. Which of the following is a clinical diagnosis based on subjective and objective findings indicating that the vital inflamed pulp is incapable of healing and has the following additional descriptors: lingering thermal pain, spontaneous pain, and referred pain?

Asymptomatic irreversible pulpitis

None of the above

Reversible pulpitis

Symptomatic irreversible pulpits

Question 9 of 20

10. 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 10 of 20

11. When using electrosurgery for management of soft tissue, the deciding factor for the current setting is

Profoundness of anesthesia

Tissue thickness

Health of the patient

Amount of fluid control desired

Question 11 of 20

12. The maximum chances of pulpal necrosis are seen in:

Avulsion

Extrusion

Subluxation

Intrusion

Question 12 of 20

13. Roughest cut surface on a tooth results from

Cross cut fissure bur at high speed

Medium grit diamond at high speed

Plane fissure bur at high speed

Medium grit diamond at low speed

Question 13 of 20

14. Principle disadvantage of minocycline in triple antibiotic paste:

Tooth staining

Teratogenic

Anaphylactic reactions

Leads to enamel hypoplasia

Question 14 of 20

15. Which of the following is least associated with the short-term strength of a material

Resilience

Creep

Brittleness

Modulus of elasticity

Question 15 of 20

16. In the conventional Class I composite preparation, retention is achieved by which of the following features? 1.Occlusal convergence 2.Occlusal bevel 3.Bonding 4.Retention grooves

1 and 4

2 and 4

2 and 3

1 and 3

Question 16 of 20

17. As caries progresses from enamel to dentin and toward the pulp interproximally, the radiographic appearance resembles which of the following?

V shape in enamel with apex toward the proximal surface and V shape in dentin with the pex toward the pulp, resulting in a diamond appearance

V shape in the enamel with the apex toward the DEJ and V shape in dentin with apex toward the pulp

V shape in enamel with the apex toward the DEJ and V shape in dentin with the apex toward the DEJ, resulting in a bowtie appearance

V shape in enamel with the apex toward the proximal surface and V shape in dentin with the apex toward the DEJ

Question 17 of 20

18. Which zone in dentinal caries is associated with degeneration in inter tubular dentin and deposition of prism like structures in dentin tubules

Normal dentin

Transparent dentin

Turbid dentin

Sub transparent dentin

Question 18 of 20

19. Which of the following statements regarding caries risk assessment is correct?

The presence of restorations is a good indicator of past caries activity.

The presence of restorations is a good indicator of current caries activity.

The presence of dental plaque is a good indicator of current caries activity.

The presence of pit-and-fissure sealants is a good indicator of current caries activity.

Question 19 of 20

20. Tooth with definite single root canal:

Maxillar?y canine

Maxillary central incisor

Maxillary second premolar

Mandibular first premolar

Question 20 of 20