Endodontics & Conservative Dentistry #4

1. The endodontic access form is triangular in shape for which of the following teeth?

Maxillary central incisor, mandibular central incisor, and maxillary lateral incisor

Mandibular central incisor, maxillary first molar, and maxillary first premolar

Maxillary central incisor, maxillary first molar, and maxillary second molar

Maxillary canine, maxillary first premolar, and maxillary lateral incisor

Question 1 of 20

2. A composite restoration is to be done in case of a bleached tooth. Maximum bond strength will be achieved when composite is done after:

1 hour

1 week

1 day

2 weeks

Question 2 of 20

3. After completion of root canal therapy, you recall your patient to evaluate the treatment outcome. What are the criteria for successful root canal therapy?1. Absence of pain 2. Absence of swelling 3. Sinus tract healing 4. No residual probing defects 5. Resolution or healing of periapical lesions

1, 2, 3, 4, 5

2, 3, 4

1, 2, 4, 5

1, 3, 5

Question 3 of 20

4. You are halfway through the root canal treatment on tooth #30. To prevent bacterial growth in the canal between appointments, you decide to use an intracanal medication. The interappointment medicament of choice is:

Calcium hydroxide

Chlorhexidine

Sodium hypochlorite

Ethylenediaminetetraacetate

Question 4 of 20

5. An 8-year-old patient presents to your office for an emergency visit with a traumatic exposure of tooth #9. The treatment of choice for this patient is

Traditional root canal therapy

Partial pulpectomy

Root-end closure procedure/apexification

Vital pulp therapy/apexogenesis

Question 5 of 20

6. A patient reports with acute apical abscess. Drainage is established through emergency root canal access. Should the access opening be kept open till the next appointment:

It should never be kept open

After immediate drainage, patient should be made to sit for some time; canal should be closed when it can be dried

Yes, only in weeping canals

Yes, if swelling is present

Question 6 of 20

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

4-8x

8-14x

26-30x

14-26x

Question 7 of 20

8. Which of the following is not true regarding a K file as compared to a reamer:

Used in push & pull motion

Is more flexible than a reamer

Has a square cross section

It contains more flute than reamers

Question 8 of 20

9. Normally the endodontic post retaining a core-should extend to

Half of the root length

One-third of the root length

The apex of the root

Two-third of the root length

Question 9 of 20

10. Roughest cut surface on a tooth results from

Medium grit diamond at high speed

Medium grit diamond at low speed

Cross cut fissure bur at high speed

Plane fissure bur at high speed

Question 10 of 20

11. ND: YAG laser wavelength

0.60 um

1.060 um

300 um

10.60 um

Question 11 of 20

12. A cold test best localizes

Pulp necrosis.

Periodontal pain.

Referred pain.

Pain of pulpal origin.

Question 12 of 20

13. Which of the following is not true when fixing the matrix band for filling a Class 2 cavity with amalgam? The matrix band should

Support the marginal ridge of the restoration during amalgam packing

Fit the cervical margin of the proximal box loosely

Provide a physiological contour for the proximal surface of the restoration

Be higher than the occlusal surface of the tooth

Question 13 of 20

14. The main purpose of finishing the enamel wall of a prepared cavity is to

Smoothen the walls of the cavity to permit accurate adaptation of the restorative material

Prevent microleakage

Remove loose enamel rods

Ensure parallelism of the walls

Question 14 of 20

15. Choose the incorrect statement about Class V amalgam restorations.

The outline form is usually kidney- or crescent shaped.

Using four corner coves instead of two full length grooves conserves dentin near the pulp and may reduce the possibility of a mechanical pulp exposure.

Because the mesial, distal, gingival, and incisal walls of the tooth preparation are perpendicular to the external tooth surface, they usually diverge facially.

If the outline form approaches an existing proximal restoration, it is better to leave a thin section of tooth structure between the two restorations (< 1 mm) than to join the restorations.

Question 15 of 20

16. Which of the following is a clinical diagnosis based on subjective and objective findings indicating that the vital inflamed pulp is incapable of healing and has the following additional descriptors: lingering thermal pain, spontaneous pain, and referred pain?

Reversible pulpitis

Symptomatic irreversible pulpits

None of the above

Asymptomatic irreversible pulpitis

Question 16 of 20

17. A patient comes in claiming that their holistic: doctor told him that he has an allergy to mercury and needs only white fillings. Your best response is:

you might have mercury allergy, but that is very rare; plus, there is no mercury in amalgam fillings

you might have a mercury allergy, but that is very rare; plus, with proper isolation and technique, your exposure will be minimal

there is no such thing as a mercury allergy; plus, there is no mercury in amalgam fillings

there is no such thing as a mercury allergy; plus, with proper isolation and technique, your exposure will be minimal

Question 17 of 20

18. Following restoration with gold, the tooth was sensitive to pressure, cold and heat, the best course of action is to

Remove the restoration and start endodontic treatment

Remove the restoration and place a sedative temporary restoration

Observe for two weeks and then decide

Relieve the tooth of any occlusal contact

Question 18 of 20

19. Core built up on a molar tooth should preferably be done with a chemically cured composite as

Core made with a light cure resin would be too opaque and esthetically unacceptable

Core made with a light cure resin would be too brittle and would fracture easily

Light cure resin lacks sufficient strength for a core

Its lower viscosity allows free flow of resin also around pins and post

Question 19 of 20

20. Maxillary canines

Possess extremely curved canals.

Have an anatomic apex distant from the apical foramen.

Are 25 mm or longer.

Are usually less than 25 mm long.

Question 20 of 20