Endodontics & Conservative Dentistry #1

1. Bonding of resins to dentin is best described as involving _____.

Mechanical interlocking

Van der Waals forces

Ionic bonding

Covalent bonding

Question 1 of 20

2. A cold test reveals a lingering pain. You ask the patient to raise her hand until the pain subsides. The patient raises her hand for about 8 seconds. What does this data suggest?

Pulp necrosis

Symptomatic irreversible pulpitis

Reversible pulpitis

Symptomatic apical periodontitis

Question 2 of 20

3. Which of the following is not a point angle of a MO Class II cavity?

Axiofaciogingival

Distolinguopulpal

Axiolinguopulpal

Cervicogingivopulpal

Question 3 of 20

4. With the cone moved to the distal and facing towards the mesial, the mesiobuccal root of the first molar

Will be projected distally on the film.

Will be projected mesially on the film.

Will not move.

Appears to move lingually.

Question 4 of 20

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

Age of patient

Vitality of pulp

Thickness of dentin

Type of patient

Question 5 of 20

6. Patients scheduled for retreatment

Should expect successful resolution.

May complain of thermal response on an adjacent tooth.

May expect to have less interappointment pain.

Should expect surgical intervention.

Question 6 of 20

7. Type of bacteria found in pulpitis:

Gram positive

Anaerobic mixed infection

Gram negative

Polymicrobial facultative anaerobic

Question 7 of 20

8. pH at which enamel demineralization starts:

6.5

4.5

5.5

7.5

Question 8 of 20

9. The reduction of which of the following represents the most significant advantage of the acid etch technique

Reduced porosity of restoration

Microleakage

Shrinkage of restorative material

Coefficient of thermal expansion of restorative material

Question 9 of 20

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

14-26x

26-30x

8-14x

4-8x

Question 10 of 20

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

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

May be needed in large preps

Question 11 of 20

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

At the root apex

On the distal side of root canal

Distributed uniformly along the root length

On shoulder of preparation

Question 12 of 20

13. Which of the following can be viewed on a conventional radiograph?

Gingival fibers

Calcification of canals

Buccal curvature of roots

Periodontal ligament

Question 13 of 20

14. 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.

Incomplete isthmus with a faint communication between two canals.

A very short, complete isthmus between two canals.

Question 14 of 20

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

Use a smaller instrument and get by the ledge.

Use a small, round bur and remove the ledge.

Continue working gently with larger files to remove the ledge.

Fill as far as you have reamed.

Question 15 of 20

16. A patient presents to your office for initial examination. A root canal procedure had been completed on tooth #3 a year prior. Upon clinical examination, you observe a narrow periodontal pocket measuring the full length of your probe in the area of the mesial root. Upon radiographic examination, you detect a J-shaped radiolucency surrounding the mesial root. Your initial diagnosis is:

Periodontal abscess

Incomplete debridement of the mesial root

Ledging of the mesial root

Vertical fracture of the mesial root

Question 16 of 20

17. Which of the following statements regarding caries risk assessment is correct?

The presence of restorations is a good indicator of past caries activity.

The presence of pit-and-fissure sealants is a good indicator of current caries activity.

The presence of restorations is a good indicator of current caries activity.

The presence of dental plaque is a good indicator of current caries activity.

Question 17 of 20

18. Wedge wedge technique is indicated in cases of:

Depression of interdental papilla

Loose contacts

Concavity on the proximal root surface

Gingival recession

Question 18 of 20

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

All of the above

When routine endodontic therapy is impractical

When previous treatment has failed

When perforating internal or external resorption is present

Question 19 of 20

20. In general, ductility ________ in temperature, whereas malleability ________ in temperature.

Increases with increase, increases with increase

None of the above

Increases with increase, decreases with increase

Decreases with increase, increases with increase

Question 20 of 20