Endodontics & Conservative Dentistry #2

1. A patient is diagnosed with symptomatic apical periodontitis and refuses treatment due to fear of needles. Your statement to the patient should include the fact that:

Eventually, the acute nature of the lesion will progress into a chronic and nonpainful lesion

None of the above

The apical lesion has been there or years and the tooth needs treatment immediately

This lesion can progress into the bone causing osteomyelitis, a more severe condition

Question 1 of 20

2. Once the root canal is obturated, what usually happens to the organism that had previously entered periradicular tissues from the canal?

They are eliminated by the natural defenses of the body.

They will have been eliminated by various medicaments that were used in the root canal.

They persist and stimulate formulation of a granuloma.

They reenter and reinfect the sterile canal unless root-end surgery is performed.

Question 2 of 20

3. The main benefit of primary incisor replantation is

Maintenance of a normal anterior dentition

To maintain child's self-esteem

To maintain child's social acceptance

To relieve parental guilt

Question 3 of 20

4. When preparing a Class III or IV composite tooth preparation, which of the following is false regarding placement of retention form?

May be needed in large preps

Is usually prepared with a No. . round bur

Is placed at the axiogingival line angle regardless of the depth of the axial wall

Often involves gingival and incisal retention

Question 4 of 20

5. Cluster headache differs from migraine in being

Unilateral and involving the teeth.

Principally a female complaint.

Unilateral and involving the eye.

Bilateral.

Question 5 of 20

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

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

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

Maxillary canine, maxillary first premolar, and maxillary lateral incisor

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

Question 6 of 20

7. The most important aspect of irrigation is:

Lumen of needle

Chelating action of solution

Aspiration of solution

olume of irrigant used

Question 7 of 20

8. The major objectives of access preparation include all of the following except which one?

The attainment of direct, straight-line access to canal orifices.

The attainment of direct, straight-line access to the apical portion of the root.

The confirmation of clinical diagnosis.

The conservation of tooth structure.

Question 8 of 20

9. 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 definitive restoration

Marginal integrity of definitive restoration

Type of temporary sealing material

Placement of a post

Question 9 of 20

10. Maintenance of pulp vitality in a fracture of crown with pulp exposure fracture will

Improves prognosis when done before treatment

Does not affect prognosis

Improves prognosis in immature teeth

Improves prognosis in mature teeth

Question 10 of 20

11. While performing nonsurgical endodontic therapy you detect a ledge. What should you do?

Use a small, round bur and remove the ledge.

Fill as far as you have reamed.

Continue working gently with larger files to remove the ledge.

Use a smaller instrument and get by the ledge.

Question 11 of 20

12. What should be the first treatment for an acutely avulsed tooth.

Immediate endodontic treatment and reimplant

Gently replace with finger using light pressure, take radiograph and splint

Pulp protection

Sterilize the root and reimplant

Question 12 of 20

13. A classic teardrop-shaped periradicular lesion on a radiograph can be indicative of a vertical root fracture. The prognosis of a vertical root fracture is hopeless, and the tooth should be extracted.

First statement is true, second is false.

Both statements are false.

First statement is false, second is true.

Both statements are true.

Question 13 of 20

14. 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

Root-end closure procedure/apexification

Traditional root canal therapy

Partial pulpectomy

Vital pulp therapy/apexogenesis

Question 14 of 20

15. Which of the following types and concentrations of fluoride should be recommended for home-care custom tray use by a patient with head and neck cancer

1.23% acidulated phosphate fluoride, 0.4% stannous fluoride, and 1 % neutral sodium fluoride

0.4% stannous fluoride and 1.23% acidulated phosphate fluoride

0.4% stannous fluoride and 1 % neutral sodium fluoride

1.23% acidulated phosphate fluoride and 1 % neutral sodium fluoride

Question 15 of 20

16. When restoring severely broken down teeth, which pins are most retentive?

Inlay

Frictional

Threaded

Cemented

Question 16 of 20

17. The nerve fibers of the pulp are

mainly myelinated fibers at the time of tooth eruption.

unevenly distributed throughout the pulp.

easily damaged by inflammation.

only sensory.

Question 17 of 20

18. In the conventional Class I composite preparation, retention is achieved by which of the following features? 1.Occlusal convergence 2.Occlusal bevel 3.Bonding 4.Retention grooves

1 and 3

2 and 3

2 and 4

1 and 4

Question 18 of 20

19. After preparation, deep cavities should be sterilized with

Silver nitrate

Iodine solution

They should not be sterilized

Alcohol

Question 19 of 20

20. Process of Internal resorption of root is influenced most by:

Age of patient

Thickness of dentin

Type of patient

Vitality of pulp

Question 20 of 20