Endo. Cons Revision #5

1. Which of the following microorganisms is associated with dental caries

Str.salivarius

Str. Sanguis

Str.mitis

Str.rattus

Question 1 of 20

2. On physical and radiographic examination, your patient presents with DO decay and a gingival swelling at tooth #28. The conical defect on the tooth probes more than 12 mm on the buccal aspect and does not respond to electrical pulp testing. There is no mobility, and this condition is localized to the affected tooth. The periapical radiograph shows destruction of the periodontium from the level of the gingival sulcus to the apex of the tooth. Proper treatment of this condition includes:

eriodontal treatment only

Endodontic treatment followed by periodontal treatment

Periodontal treatment followed by endodontic treatment

Endodontic treatment only

Question 2 of 20

3. Low threshold fibres of pulp mediating proprioception are

A ?

C fibres

A ?

Question 3 of 20

4. Your patient presents with diffuse pain in her upper right quadrant. She is unable to determine the offending tooth. She states that the pain is exacerbated when she drinks cold liquids but not with mastication. Tooth #4 has an existing MOD amalgam restoration, as does tooth #5. All other teeth in the quadrant are free of restorations and caries. What is the appropriate first-line diagnostic pulp test?

Cold test

Heat test

Electric pulp test

Test cavity

Question 4 of 20

5. Which of the following is responsible for penetration of bacteria in caries of dentin

Increased mobility of bacteria in dentinal tubules

Change in salivary pH

Pumping of bacteria into tubules due to fluid movement during mastication

Thermal changes in oral cavity during mastication

Question 5 of 20

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

a smaller instrument first.

removal of the clinical crown.

a larger instrument first.

precurvaturc of a smaller instrument.

Question 6 of 20

7. You have placed files in all three canals located in tooth #19 during a root canal procedure to obtain measurement. Upon taking the first radiograph, the two files in the distal canal are superimposed. For your second radiograph, you move the cone to the mesial. The resulting image shows both files in the distal canal. The file that has moved to the mesial is positioned:

Mesially

Distally

Buccally

Lingually

Question 7 of 20

8. The primary contraindication(s) for the use of a composite restoration is (are) _____.

Extension onto the root surface

Inability to isolate the operating area

Nonesthetic areas

Occlusal factors

Question 8 of 20

9. 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 9 of 20

10. In order to complete a cutting circle of the anal wall, the triangular shaft instrument requires:

1/4 turn

1/2 turn

Full turn

1/3 turn

Question 10 of 20

11. A polyp may arise in connection with

pulp necrosis

chronic open pulpitis

chronic periapical lesion

acute pulpitis

Question 11 of 20

12. A full cast crown which fails to seat properly and is rocking. This could be due to all of the following, except

A void on the inner occlusal surface of the casting

Removal of a portion of the stone die when a bubble was removed from the master cast

A bubble on the master cast in the buccal cusp area

Investment incompletely removed from the die

Question 12 of 20

13. What is run out of a bur

Number of flutes on the head of a carbide bur

Maximum displacement of bur head during active cutting of tooth

The ability of a bur to cut through 2 mm of dentin

Maximum displacement of a bur head from its long axis of shaft during rotation

Question 13 of 20

14. A primary tooth has an exposed vital pulp. The tooth has less than two-third of its root remaining and caries perforating the furcation. There is a succedaneous tooth forming normally apical to the tooth. The treatment of choice for this tooth is:

Pulpotomy

Extraction

Indirect pulp cap

Pulp cap

Question 14 of 20

15. Which of the following is not suggested as irrigants during root canal therapy

Sodium hypochlorite

Hydrogen peroxide

Calcium hydroxide

Urea peroxide (Gly-Oxide)

Question 15 of 20

16. Pulpal pain response is

Quick and sharp when carried by unmyelinated c fibers.

Dull and throbbing when carried by myelinated c fibers.

Dull and throbbing when carried by unmyelinated c fibers.

Quick and sharp when carried by myelinated c libers.

Question 16 of 20

17. The absence of which layer of dentin predisposes it to internal resorption by cells present in the pulp?

Secondary dentin

Mantle dentin

Predentin

Circumpulpal dentin

Question 17 of 20

18. To avoid pulpal irritation below any restorative material, the minimum thickness of the dentine should be

1.5mm

2.5 mm

2 mm

1.3mm

Question 18 of 20

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

Composite resin

Zinc phosphate cement

Dentin

Silicate

Question 19 of 20

20. Maximum injury to protective layer is during

Concussion

Extrusion

Luxation

Intrusion

Question 20 of 20