Endodontics & Conservative Dentistry #3

1. Which of the following is true regarding fluoride release from GIC:

It remains the same

Rapid early but falls with decreasing concentration of fluoride

Rapid after 1 month

Very slow during the first few days

Question 1 of 20

2. Why is etchant preferred as a gel instead of solution

To enhance and concentrate the action of the acid

To make it easier to wash off

To make identification easier

To allow better control over placement

Question 2 of 20

3. Preventive measures to avoid cracked teeth, include all of the following, except

None of the above

Placing pins horizontally into the dentin of the buccal and lingual internal walls and filling the cavity with amalgam

Avoiding full coverage

Onlaying cusps with reverse bevels

Question 3 of 20

4. Which type of obturation technique requires heat?

Lateral condensation

Chemically plasticized

Vertical condensation

MTA obturation

Question 4 of 20

5. 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 provide stronger retention than pins.

Slots are used where vertical walls allow opposing retention locks.

Slots and grooves can be used interchangeably.

Question 5 of 20

6. Low threshold fibres of pulp mediating proprioception are

A ?

C fibres

A ?

Question 6 of 20

7. Which of the following statements about an amalgam tooth/cavity preparation is true?

The cavosurface margin should provide for a 90-degree amalgam margin.

All prepared walls should converge externally.

Retention form for Class Vs can be placed at the DEJ.

The enamel cavosurface margin angle must be 90 degrees.

Question 7 of 20

8. A/An____________ base is a base that is typically placed over a calcium hydroxide base that has been placed over a pulp exposure.

Direct base

Indirect base

Primary base

Secondary base

Question 8 of 20

9. Flare-ups occur more often

In endodontic treatment of vital teeth.

In teenagers.

In the afternoon and evening.

In endodontic treatment of pulpless teeth.

Question 9 of 20

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

Eubacterium and Fusobacterium

Porphyromonas species and Bacteroides melaninogenica

Actinomycetes and Spirochetes

Wolinella and Veillonella species

Question 10 of 20

11. According to Kim et al Classification Class III isthmus indicates:

A complete or incomplete isthmus between three or more canals.

Complete isthmus with two canals with a definite connection between them.

A very short, complete isthmus between two canals.

Incomplete isthmus with a faint communication between two canals.

Question 11 of 20

12. In a tooth with apical root fracture which of the following is true

The tooth should be extracted as soon as possible

Tooth remains vital with little increase in mobility

Tooth will necrose and increased mobility

Tooth shows increased mobility with tenderness

Question 12 of 20

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

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

The taper of the file and the length of the file

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

Question 13 of 20

14. Root canal therapy is completed on a mandibular first molar and closed temporarily with a cotton pellet and a temporary sealing material, withplans for a definitive restoration to be placed as soon as possible. What is the most important factor in ensuring the success of the procedure?

Type of temporary sealing material

Type of definitive restoration

Placement of a post

Marginal integrity of definitive restoration

Question 14 of 20

15. As caries progresses from enamel to dentin and toward the pulp interproximally, the radiographic appearance resembles which of the following?

V shape in the enamel with the apex toward the DEJ and V shape in dentin with apex toward the pulp

V shape in enamel with apex toward the proximal surface and V shape in dentin with the pex toward the pulp, resulting in a diamond appearance

V shape in enamel with the apex toward the DEJ and V shape in dentin with the apex toward the DEJ, resulting in a bowtie appearance

V shape in enamel with the apex toward the proximal surface and V shape in dentin with the apex toward the DEJ

Question 15 of 20

16. When making a diagnosis, the primary goal of your diagnostic tests is to reproduce the chief complaint. You test the suspected tooth for percussion sensitivity and palpation sensitivity. Your positive percussion findings can be interpreted as follows:

There is inflammation in the PDL and the surrounding periodontium.

The tooth is nonvital and should be treated with root canal therapy.

There is a root fracture present.

There is inflammation in the PDL.

Question 16 of 20

17. When using electrosurgery for management of soft tissue, the deciding factor for the current setting is

Profoundness of anesthesia

Amount of fluid control desired

Health of the patient

Tissue thickness

Question 17 of 20

18. Which cells do not characterize the cellular response at the onset of pulpal inflammation?

Polymorphonuclear (PMN) Leukocytes

Lymphocytes

Macrophages

Plasma cells

Question 18 of 20

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

Similar depth as an amalgam cavity

Increased depth compared to amalgam cavity

Reduced depth compared to amalgam cavity

Wider proximal box compared to amalgam cavity

Question 19 of 20

20. In clinical practice we find commonly that some teeth show cervical concavities with enamel loss and vertical fracture lines extending towards the tip of clinical crown. This situation is defined as:

Erosion

Attrition

Abrasion

Abfraction

Question 20 of 20