Endodontics & Conservative Dentistry #2

1. ____ is degraded by Streptococcus mutans into ____ and ___ , thereby causing caries initiation and progression.

sucrose, glucans, lactic acid

glucose, glucans, lactic acid

glucose, sucrose, acetic acid

sucrose, glucose, acetic acid

Question 1 of 20

2. You are instrumenting a canal with a size 30, 25 mm k-type file. What does each of the sizes denote, respectively?

The length of the file and the diameter of the tip of the file

The taper of the file and the length of the file

The diameter of the tip of the file and the length of the file

The diameter of the tip of the file and the taper of the file

Question 2 of 20

3. The occlusal portion of the wax pattern is usually carved

After the faciolingual surface

After the proximal surfaces

Last

First

Question 3 of 20

4. True about inflammation confined to pulp:

Increased vascular permeability

Vasoconstriction

Stagnation of pulp vasculature

Increased vascularity

Question 4 of 20

5. First consideration in a case with root fracture:

Immediate root canal therapy

Immobilisation and stabilization

Restoration of the tooth

Tooth should be extracted

Question 5 of 20

6. Irreversible denatured dentine is:

Discolored dentin

Non affected dentin

Infected dentin

Affected dentin

Question 6 of 20

7. After completion of root canal therapy, you recall your patient to evaluate the treatment outcome. What are the criteria for successful root canal therapy?1. Absence of pain 2. Absence of swelling 3. Sinus tract healing 4. No residual probing defects 5. Resolution or healing of periapical lesions

2, 3, 4

1, 2, 3, 4, 5

1, 3, 5

1, 2, 4, 5

Question 7 of 20

8. Which type of corrosion is not seen in High Copper Amalgam,

Chemical corrosion

Electrochemical corrosion

Corrosion does not occur at all

Penetrating corrosion

Question 8 of 20

9. According to the Weine's classification of root canal system, 2 canals starting from the pulp chamber and ending as 2 orifices is classified as:

Type I

Type II

Type TV

Type III

Question 9 of 20

10. A dentin conditioner

Raises surface free energy of dentin

Thinly coats the collagen fibrils with resin

Bonds the composite

Removes the smear layer

Question 10 of 20

11. Causes of postoperative sensitivity with amalgam restorations include all of the following except _____.

Lack of dentinal sealing

Voids

Lack of adequate condensation, especially lateral condensation in the proximal boxes

Extension onto the root surface

Question 11 of 20

12. Fiber reinforced composite can be used for all of the following except:

As a splint

As a post in teeth with crown fractured due to trauma

As a space maintainer

Obturation of deciduous teeth.

Question 12 of 20

13. In vertical condensation technique with thermoplasticized GP, which of the following is done:

GP is softened by heat and condensed to fill the lateral canals-in all

Choose master cone and cut with warm instrument

Softening by heat and chemicals

3 dimensions Solvent softening and warm condensation

Question 13 of 20

14. Most important property of fissure sealants is:

Increased compressive strength

Increased filler content

Inclusion of colouring agents

Low viscosity

Question 14 of 20

15. Which Two bacteria below are the most commonly found bacteria in endodontic infections?

Actinomycetes and Spirochetes

Eubacterium and Fusobacterium

Porphyromonas species and Bacteroides melaninogenica

Wolinella and Veillonella species

Question 15 of 20

16. If a carious lesion approaches pulp, the pain is referred to the adjacent teeth. The nerve fibres responsible for this are the:

A ?

C fibres

A ?

B fibres

Question 16 of 20

17. When carving a Class I amalgam restoration, which statement is false?

Do not carve deep occlusal anatomy.

Carving may be made easier by waiting 1 or 2 minutes after condensation before it is started.

The blade of the discoid carver should move parallel to the margins resting on the partially set amalgam.

The carved amalgam outline should coincide with the cavosurface margins.

Question 17 of 20

18. Pregnant patients in the first trimester

Are not candidates for electronic apex locators.

Should delay use of x-ray until the second trimester.

Are not at risk from pharmacologic intervention.

Should receive the normal x-ray dose for endodontic therapy.

Question 18 of 20

19. What should be the first treatment for an acutely avulsed tooth.

Pulp protection

Immediate endodontic treatment and reimplant

Sterilize the root and reimplant

Gently replace with finger using light pressure, take radiograph and splint

Question 19 of 20

20. Color change in a process indicator strip indicates

Verification of sterilization.

A need to reprocess.

Verification of completed sterilization cycle.

change in ph.

Question 20 of 20