Endodontics & Conservative Dentistry #4

1. All of the following statements regarding adjuncts to endodontic treatment are true EXCEPT

Transplanted teeth with partial root development have a better prognosis than do those with developed roots

A major disadvantage of endodontic implants is the lack of an apical seal

Orthodontic extrusion is commonly indicated prior to implant placement

Intentional replantation is a viable alternative to endodontic surgery

Question 1 of 20

2. Incision for drainage will release exudates from a soft tissue swelling, reducing irritants and pain from pressure buildup. What are the ideal conditions under which to perform an incision for drainage?

A necrotic tooth with an indurated swelling at the apex

A tooth with reversible pulpitis and pain on mastication

A tooth with irreversible pulpitis and pain on percussion

A necrotic tooth with a fluctuant swelling at the apex

Question 2 of 20

3. Suspension liners, for example calcium hydroxide, harden intraorally by the:

Chemical reaction involving polymerization

Chemical reaction involving chelation

Chemical reaction of acids and bases

Physical reaction of drying

Question 3 of 20

4. Why is GP selected as master cone:

It is rigid and has strength.

It suits Cana anatomy just like standardized instrument size

It is flexible

Useful in narrow, tortuous and curved canal

Question 4 of 20

5. A no. 33 . bur is

A round bur

A tapered fissure bur

An inverted cone bur

A straight fissure bur

Question 5 of 20

6. Your patient presents with diffuse pain in her upper right quadrant. She is unable to determine the offending tooth. She states that the pain is exacerbated when she drinks cold liquids but not with mastication. Tooth #4 has an existing MOD amalgam restoration, as does tooth #5. All other teeth in the quadrant are free of restorations and caries. What is the appropriate first-line diagnostic pulp test?

Electric pulp test

Test cavity

Heat test

Cold test

Question 6 of 20

7. Irrigant of choice in a tooth with an acute pulpal abscess is

Hydrogen peroxide

Normal saline

Sodium hypochlorite

EDTA

Question 7 of 20

8. Distance of the blade from the shank to have anti-rotational design of instrument should be

5 mm

2 mm

4 mm

3 mm

Question 8 of 20

9. An upper central incisor in a 7 year old child has an open apex and needs to undergo root canal treatment. The best way to determine the working length in this case is by

Paper point method

Using an apex locator

Radiographic determination using IOPA X-ray

Tactile method

Question 9 of 20

10. Causes of postoperative sensitivity with amalgam restorations include all of the following except _____.

Lack of adequate condensation, especially lateral condensation in the proximal boxes

Lack of dentinal sealing

Voids

Extension onto the root surface

Question 10 of 20

11. 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, 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

Question 11 of 20

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

Reduced porosity of restoration

Microleakage

Coefficient of thermal expansion of restorative material

Shrinkage of restorative material

Question 12 of 20

13. To enhance crown preparation and retention, crown lengthening is completed by

Conventional gingivectomy in the presence of infrabony defects,

Laser surgery in the presence of infrabony defects.

Apicaily positioned flap, reverse bevel in the presence of infrabony defects.

Electrosurgery in the presence of infrabony defects.

Question 13 of 20

14. When using bioactive substances for the repair, of a root perforation, which of the following zones will not be seen

Zone of stimulation

Zone of hard tissue; formation

Zone of proliferation

Zone of necrosis

Question 14 of 20

15. In the ADA Classification of inspection and examination, type 4 is:

Screening using tongue depressor, mirror & available illumination

Examination using mirror, illumination, study model, radiographs

Inspection using mouth mirror & probe / explorer

Examination using mirror, probe, illumination and bitewing radiographs

Question 15 of 20

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

Type of patient

Vitality of pulp

Age of patient

Thickness of dentin

Question 16 of 20

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

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

Immediate endodontic treatment and reimplant

Sterilize the root and reimplant

Pulp protection

Question 17 of 20

18. Traumatized tooth with a necrotic pulp shows a periapical area of rarefaction radiographically. The pulpal area is closed. Viable microorganisms might be cultured from the canal in approximately what percentage of the cases

80 percent

70 percent

10 percent

30 percent

Question 18 of 20

19. Function of post in an endodontically treated tooth is:

Increases retention of the crown by providing parallel walls

Provide support to restoration

Prevents root fracture

Reinforces the restoration and the remaining tooth structure

Question 19 of 20

20. 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 restorations is a good indicator of current caries activity.

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

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

Question 20 of 20