Endo. Cons Revision #1

1. The reduction of which of the following represents the most significant advantage of the acid etch technique

Shrinkage of restorative material

Coefficient of thermal expansion of restorative material

Microleakage

Reduced porosity of restoration

Question 1 of 20

2. Pulpal pain response is

Dull and throbbing when carried by myelinated c fibers.

Quick and sharp when carried by myelinated c libers.

Dull and throbbing when carried by unmyelinated c fibers.

Quick and sharp when carried by unmyelinated c fibers.

Question 2 of 20

3. Most important property of fissure sealants is:

Inclusion of colouring agents

Increased compressive strength

Increased filler content

Low viscosity

Question 3 of 20

4. Electric pulp testing can give a false positive reaction in which of the following?

Traumatic injury to teeth

Calcified root canals

Anxious patient

Patient on NSAIDs

Question 4 of 20

5. Which of the following statements is not true regarding bonding systems?

One-bottle dentin bonding systems may be simpler but are not necessarily better.

Even though dentin bonding occurs slowly, it results in a stronger bond than to enamel.

Enamel bonding occurs quickly, is strong, and is long-lasting.

Dentin bonding is still variable because of factors such as sclerosis, tubule size, and tubule location.

Question 5 of 20

6. In the double cone pattern of proximal caries extending through enamel and dentin, the apices of the two cones

Point in opposite directions

Point towards the pulp

Are directed towards the external surface

Are directed towards each other

Question 6 of 20

7. A patient reports with acute apical abscess. Drainage is established through emergency root canal access. Should the access opening be kept open till the next appointment:

After immediate drainage, patient should be made to sit for some time; canal should be closed when it can be dried

Yes, if swelling is present

It should never be kept open

Yes, only in weeping canals

Question 7 of 20

8. Retrograde (apical resection surgery) treatment is considered over orthograde treatment (root canal retreatment) for patients by their dentist after their root canal therapy is considered to have failed. When should retrograde treatment be performed over orthograde treatment?

When a patient is anxious about traditional retreatment procedures

When an expensive, yet coronally sealed restoration would have to be refabricated to accommodate rthograde treatment

If the goal of treatment is to eliminate microorganisms from the root canal system

When the root canal filling materials are easy to remove

Question 8 of 20

9. Suspension liners, for example calcium hydroxide, harden intraorally by the:

Chemical reaction involving chelation

Chemical reaction involving polymerization

Chemical reaction of acids and bases

Physical reaction of drying

Question 9 of 20

10. A dentin conditioner

Raises surface free energy of dentin

Removes the smear layer

Bonds the composite

Thinly coats the collagen fibrils with resin

Question 10 of 20

11. The shank of a dental hand cutting instrument joints the blade to the

Hand

Primary cutting edge

Handle

Secondary cutting edge

Question 11 of 20

12. Which portion of a gas flame should be used to melt gold casting alloys?

Red - heat zone

Yellow - oxidizing zone

Blue - reducing zone

Green - combustion zone

Question 12 of 20

13. What are the structural components of composite?

All of the above

A coupling agent and initiator

Polymer matrix and coupling agents

Polymer matrix and filler particles

Question 13 of 20

14. Common between amalgam an ceramic is:

High compressive strength and high tensile strength

High compressive strength and low tensile strength

Increased working and setting times

Equal compressive and tensile strength

Question 14 of 20

15. How should the pulp be protected in deeply carious cavity

Ca(OH)2 used as liner

Use of cavity varnish

Use of light cured resin modified glass ionomer

Use of chemfil varnish

Question 15 of 20

16. Which of the following types and concentrations of fluoride should be recommended for home-care custom tray use by a patient with head and neck cancer

0.4% stannous fluoride and 1 % neutral sodium fluoride

1.23% acidulated phosphate fluoride, 0.4% stannous fluoride, and 1 % neutral sodium fluoride

0.4% stannous fluoride and 1.23% acidulated phosphate fluoride

1.23% acidulated phosphate fluoride and 1 % neutral sodium fluoride

Question 16 of 20

17. Which of the following situations may be indications for intentional replantation

When routine endodontic therapy is impractical

When perforating internal or external resorption is present

When previous treatment has failed

All of the above

Question 17 of 20

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

Brittleness

Modulus of elasticity

Resilience

Creep

Question 18 of 20

19. Following the placement of an amalgam restoration, the tooth is most sensitive to

Heat

Bitter

Sweet

Cold

Question 19 of 20

20. Which of the following diagnostic criteria is least reliable in the assessment of the pulpal status of the primary dentition?

Swelling

Electric pulp test

Internal resorption

Spontaneous pain

Question 20 of 20