Endodontics & Conservative Dentistry #5

1. Affected dentin differs from infected dentin in that, it has

Been invaded by microorganisms

A soft leathery texture

Been calcified

Not been invaded by microorganisms

Question 1 of 20

2. When comparing pin retention with slot retention for a complex amalgam restoration, which of the following statements is false?

Pin retention is used primarily where there are few or no vertical walls

Slots and grooves can be used interchangeably.

Slots provide stronger retention than pins.

Slots are used where vertical walls allow opposing retention locks.

Question 2 of 20

3. Laser used for dentin hypersensitivity acts by:

Obliteration of tubules

Transient reduction in action potential mediated by C fibres in pulp

Sealing of tubules

Precipitation of colloid in tubules

Question 3 of 20

4. Beveling the gingival cavosurface margin of the proximal box of a Class II amalgam preparation on a permanent tooth:

hould remove unsupported enamel that may fracture

Is contraindicated because of the low edge strength of amalgam

Is unnecessary since the tooth structure in this area is strong

Should result in a long bevel

Question 4 of 20

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

Red - heat zone

Green - combustion zone

Blue - reducing zone

Yellow - oxidizing zone

Question 5 of 20

6. Which of the following is the most significant cause of ledge formation?

Infection

Remaining debris within the canal

All of the above

No straight-line access

Question 6 of 20

7. 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

Direct base

Indirect base

Secondary base

Question 7 of 20

8. The crown-down preparation advocates beginning radicular access with

removal of the clinical crown.

a smaller instrument first.

precurvaturc of a smaller instrument.

a larger instrument first.

Question 8 of 20

9. The most important aspect of irrigation is:

Lumen of needle

Chelating action of solution

olume of irrigant used

Aspiration of solution

Question 9 of 20

10. Which of the following is used for removal of broken instrument from a root canal:

Masserann kit

Thin tapered diamonds

Barbed broach

Peeso reamer

Question 10 of 20

11. The nerve fibers of the pulp are

easily damaged by inflammation.

mainly myelinated fibers at the time of tooth eruption.

only sensory.

unevenly distributed throughout the pulp.

Question 11 of 20

12. Advantage of fiber post over a metal post, all except:

Technique sensitive and expensive

Bonding to dentine

Better esthetics

Modulus of elasticity same as dentin

Question 12 of 20

13. A 16 year old boy reports with a history of traumatic injury 3 hours back leading to the avulsion of the tipper permanent incisor. The tooth is present with the patient. Which of the following should be the line of treatment

Wash the tooth with Normal saline, clean, replace the tooth in the socket, check with a radiograph and splint

Scrape the eriodontal ligament curette the socket replace and splint

Seal the apex of the tooth with retrograde amalgam restoration and replace the tooth.

Clean the tooth, autoclave, replace and splint

Question 13 of 20

14. A patient walks into your office for an emergency visit. He asks the receptionist for a cold glass of water and seems to be tilting his head sideways as to hold the water on one side of his mouth. Immediately, you suspect which reason for his visit?

reversible pulpitis

symptomatic irreversible pulpitis

pulp necrosis

asymptomatic apical periodontitis

Question 14 of 20

15. Apicoectomy procedure is done at what magnification under endodontic microscope

4-8x

26-30x

8-14x

14-26x

Question 15 of 20

16. Reaming action produces a canal of anatomy:

Round

Square

Triangular

Oval

Question 16 of 20

17. C factor is highest in which of the following:

Class III cavity

Class H cavity

Class V cavity

Class IV cavity

Question 17 of 20

18. A patient walks into your clinic holding a cup with a tooth in it. What liquid would you LEAST hope the patient kept the tooth in?

Saline

Milk

Water

Saliva

Question 18 of 20

19. Pulpal pain response is

Quick and sharp when carried by a-delta myelinated nerve fibers.

Dull and throbbing when carried by a-delta unmyelinated nerve fibers.

Quick and sharp when carried by a-delta unmyelinated nerve fibers.

Dull and throbbing when carried by a-delta myelinated nerve fibers.

Question 19 of 20

20. Wedge wedge technique is indicated in cases of:

Concavity on the proximal root surface

Loose contacts

Depression of interdental papilla

Gingival recession

Question 20 of 20