Endodontics & Conservative Dentistry #9

1. Most important property of fissure sealants is:

Inclusion of colouring agents

Low viscosity

Increased filler content

Increased compressive strength

Question 1 of 20

2. Rake angle is:

Angle between clearance face & axis of bur

Angle between tooth & rake face

Angle between rake face & axis of bur

Angle between rake face & clearance face

Question 2 of 20

3. Type of bacteria found in pulpitis:

Polymicrobial facultative anaerobic

Anaerobic mixed infection

Gram negative

Gram positive

Question 3 of 20

4. Patients scheduled for retreatment

Should expect successful resolution.

May complain of thermal response on an adjacent tooth.

Should expect surgical intervention.

May expect to have less interappointment pain.

Question 4 of 20

5. Root canal therapy was completed on a nonvital tooth that suffered trauma 5 years prior. At the time of obturation, the tooth exhibited a periapical radiolucency on radiographic examination. Radiographically, healing should be visualized in:

6 weeks

6 months

1 month

1 week

Question 5 of 20

6. The success of an amalgam restoration is dependent on all of the following features of tooth/cavity preparation except _____.

Adequate tooth removal for appropriate strength of the amalgam

Divergent (externally) preparation walls

Butt-joint cavosurface margin that results in a 90-degree margin for the amalgam

Adequate retention form features to mechanically lock the amalgam in the preparation

Question 6 of 20

7. Skirts are used in:

Class 2 amalgam

Direct filling gold

Ceramic inlay

Cast metal inlay

Question 7 of 20

8. Speed of medium category rotary instruments:

3000-6000 rpm

45,000-100,000 rpm

200-3000 rpm

20,000-45,000 rpm

Question 8 of 20

9. According to the ADA system of numbering teeth, tooth number 19 would be A permanent

Maxillary left central incisor

Mandibular left first molar

Mandibular left canine

Maxillary right second bicuspid

Question 9 of 20

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

Avulsion

Subluxation

Extrusion

Intrusion

Question 10 of 20

11. All of the following statements about slot retained complex amalgams are true except _____.

Slots should be placed at least 0.5 mm inside the DEJ.

Slots may be segmented or continuous.

Slots should be 1.5 mm in depth.

Slots should be 1 mm or more in length.

Question 11 of 20

12. Pain from a tooth is characterized by:

Dull pain conducted by unmyelinated A delta fibers

Dull pain conducted by myelinated A delta fibers

Sharp pain conducted by myelinated A delta fibers

Sharp pain conducted by unmyelinated A delta fibers

Question 12 of 20

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

Extension onto the root surface

Lack of dentinal sealing

Voids

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

Question 13 of 20

14. When comparing the Axiopulpal depth of inlay cavity with that of amalgam, the inlay preparation has:

Wider proximal box compared to amalgam cavity

Increased depth compared to amalgam cavity

Similar depth as an amalgam cavity

Reduced depth compared to amalgam cavity

Question 14 of 20

15. Cytokines associated with periapical lesions

TNF

IL 8

IL 6

IL 1

Question 15 of 20

16. A tooth may be restored with a porcelain jacket crown when

Esthetics is essential

Only the incisal angle involving enamel is missing

The patient is very young

Transverse strength is most needed

Question 16 of 20

17. Which of the following materials could be used to cement a bridge and fill a cervical lesion?

Zinc Polycarboxylate

Zinc Phosphate

Glass Ionomer

Zinc Oxide-Eugenol

Question 17 of 20

18. You have initiated root canal therapy on a patient when he suddenly experiences sudden pain during working length determination, begins to hemorrhage, and detects a burning sensation when you attempt to irrigate with sodium hypochlorite. What is the most likely cause of these symptoms?

Root canal contamination

Incomplete canal debridement

Root perforation

Inadequate straight line access

Question 18 of 20

19. In a post & core restoration, maximum amount of stress is concentrated:

On the distal side of root canal

On shoulder of preparation

At the root apex

Distributed uniformly along the root length

Question 19 of 20

20. Which one of the following cannot be observed on a conventional radiograph?

Type of canals of tooth #21.

Buccal curvature of the mesial root of tooth #30.

Open apex of tooth #8.

Canal calcification of tooth #15.

Question 20 of 20