Endodontics & Conservative Dentistry #13

1. Smooth surface caries refers to _____.

Facial and lingual surfaces

Occlusal pits and grooves

Mesial and distal surfaces

Both A and C.

Question 1 of 20

2. Which of the following is an activator used in ultraviolet lightcuring resin Systems

Aromatic ketone

Benzoyl peroxide

Tertiary amine

Benzoin methyl ether

Question 2 of 20

3. Hand endodontic instrument used to locate canal orifice:

Endo orifice finder

Gates Glidden drill

Barbed broach

Endodontic explorer

Question 3 of 20

4. Which of the following is not a risk when using air as a coolant cutting with high speeds

Tooth may become hypersensitive

Pulp may be cooled below the danger point

Tooth may be dehydrated

Converging proximal walls

Question 4 of 20

5. 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?

Cold test

Electric pulp test

Test cavity

Heat test

Question 5 of 20

6. Prior to reimplantation, tooth s soaked in 3% citric acid. This is done to:

Increase surface reactivity

Etch the surface

Remove the PDL

Disinfect the tooth

Question 6 of 20

7. Which of the following would NOT necessarily indicate the need for root canal treatment or extraction of a carious tooth?

lingering pain over 15 seconds

frank apical radiolucency

negative electric pulp test

percussion sensitivity

Question 7 of 20

8. Regardless of the nature of the sensory stimulus, all afferent impulses from the pulp result in the sensation of

heat.

touch.

proprioception.

pain.

Question 8 of 20

9. The first number on those instruments having three-number formula, indicates the

Length of the blade in tenths of a millimetre

Angle of the blade to the shaft in degrees centigrade

Width of the blade in tenths of a millimetre

Length of the blade in millimetres

Question 9 of 20

10. All of the following factors may affect endodontic anesthesia except

Tooth type

Previous unsuccessful anesthesia

Tissue inflammation

Fatigue

Question 10 of 20

11. Which of the following permanent teeth are least susceptible to carious attack?

Maxillary canines

Mandibular molars

Maxillary premolars

Mandibular incisors

Question 11 of 20

12. Gingival bevel given in class II inlay preparation:

20 degree

40 degree

35 degree

45 degree

Question 12 of 20

13. Polymerization shrinkage of composite causes compression stress of

30 MPa

5 MPa

15 MPa

1 MPa

Question 13 of 20

14. Which of the following is true regarding fluoride release from GIC:

Rapid early but falls with decreasing concentration of fluoride

It remains the same

Rapid after 1 month

Very slow during the first few days

Question 14 of 20

15. Purpose of giving occlusal offset:

Gingival preservation

Esthetics

Resistance and retention

Structural durability

Question 15 of 20

16. Electric pulp testing can give a false positive reaction in which of the following?

Calcified root canals

Anxious patient

Patient on NSAIDs

Traumatic injury to teeth

Question 16 of 20

17. A canal is prepared apically to size 40.it is found that sizes 20 to 35 can pass beyond working length, but size 40 wont.what kind of apical prep is this

open apex

apical seat

apical stop

closed apex

Question 17 of 20

18. Access cavity preparation of anterior teeth

Is completed using a k-type file.

Often can result in lateral cervical or root surface perforations.

Often can result in labial cervical or root surface perforations.

Are initiated using a no. 6 or 8 round bur.

Question 18 of 20

19. All of the following statements are true concerning posterior composite restorations EXCEPT one. Which one is the EXCEPTION?

Posterior composite restorations are contraindicated in a patient with heavy occlusion (bruxism)

Posterior composites are contraindicated for cusp replacements unless a dry operating field is maintained

Posterior composite restorations are frequently indicated in the treatment of occlusal lesions that allow conservative preparations

Posterior composite restorations may be indicated for the restoration of class ii cavities in premolar teeth where the appearance is very important, the cavity margins are in the enamel, and the occlusal contacts are on the enamel

Question 19 of 20

20. The outline form of a cavity preparation is defined as:

"the shape or form of the cavity on the surface of the tooth"

"the shape or form of the preparation after carious dentin has been excavated"

"that form the cavity takes to resist the forces of mastication"

"that form the cavity takes to resist dislodgement or displacement of the restoration"

Question 20 of 20