Endo. Cons Revision #3

1. 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 perforation

Inadequate straight line access

Incomplete canal debridement

Root canal contamination

Question 1 of 20

2. Which of the following teeth has the most consistent number of canal(s)?

Mandibular canine

Mandibular incisor

Maxillary canine

Mandibular premolar

Question 2 of 20

3. Triple Antibiotic paste is given below CEJ what is the reason:

Weakening of tooth structure by ciprofloxacin

Placing the paste too far coronally may leach the paste from the coronal seal area

Possibility of tooth discoloration by minocycline

For better sealing of apical tubules

Question 3 of 20

4. Smear layer consists of:

Microorganisms

Debris due to cutting

Dentinal chips

Cemental tears

Question 4 of 20

5. In Periapical index (PAI), Grade 3 is defined as:

Small changes in bone structure with no demineralization

Apical periodontitis with well-defined radiolucent area

Severe apical periodontitis, with exacerbating features

Changes in bone structure with some diffuse demineralization

Question 5 of 20

6. Triturating a dental amalgam will _____.

Coat the alloy particles with mercury

Reduce the crystal sizes as they form

Reduce the size of the alloy particles

Dissolve the alloy particles in mercury

Question 6 of 20

7. Micro abrasion is done using:

10% HCL

10% HF acid

37% phosphoric acid

20% Nitric acid

Question 7 of 20

8. The greatest potential hazard of chronic mercury toxicity occurs due to

Inhalation of mercury vapors

Ingestion of amalgam scrap during removal of old restoration

Skin contact with mercury

During amalgam restoration in a patient ,

Question 8 of 20

9. To avoid external transportation of the root canal

avoid the use of sodium hypochlorite.

precurve instruments.

use large instruments.

use vigorous instrumentation.

Question 9 of 20

10. Pulpal pain response is

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

Dull and throbbing 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 myelinated nerve fibers.

Question 10 of 20

11. Which of the following is not a sign or symptom of a split tooth?

Occasional mild to moderate pain

Sensitivity to thermal change

Split not visible on radiographs

Loss of sensitivity to pressure

Question 11 of 20

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

All of the above

When routine endodontic therapy is impractical

When perforating internal or external resorption is present

When previous treatment has failed

Question 12 of 20

13. Painful pulpitis associated with an inflamed or degenerating pulp

is most likely due to nociceptive C-fibcr activity.

results from a reduction of nerve cell permeability.

is associated with stimulation of A fibers.

is caused by a decrease in intrapulpal pressure.

Question 13 of 20

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

Mandibular left canine

Mandibular left first molar

Maxillary right second bicuspid

Maxillary left central incisor

Question 14 of 20

15. A 20-year-old male patient presents to your office with tooth #9 in his hand. It had been avulsed the day before during a camping trip and was stored dry in a plastic bag. Your treatment plan should be:

Clean the tooth and socket, replant the tooth, and splint it for a week

Clean the tooth and socket and replant the tooth

Give your patient all of his options to replace the tooth

Perform root canal therapy and replant the tooth

Question 15 of 20

16. A desirable property of cement bases

Low coefficient of thermal conductivity

High edge strength

Adhesiveness

High contact angle

Question 16 of 20

17. Pulpal pain response is

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.

Quick and sharp when carried by unmyelinated c fibers.

Question 17 of 20

18. Necrosis affects periapical cementum less than bone because:

Cementum is more resistant to Resorption

Cementum is vascular while bone is avascular

Infection involves bone preferentially

More number of pathways of spread of inflammation in bone

Question 18 of 20

19. Restoration of an appropriate proximal contact results in all of the following except _____.

Provides increased retention form for the restoration

Reduction/elimination of food impaction at the interdental papilla

Maintenance of the proper occlusal relationship

Provides appropriate space for the interdental papilla

Question 19 of 20

20. In which of the following scenarios would you consider using solvent softened custom cones

An irregular apical portion of the canal

All of the above

An abnormally large apical portion of the canal

After an apexification procedure

Question 20 of 20