BIOLOGY

1. What class of dental cavities involves the incisal edge of anterior teeth?

A. Class III

B. Class II

C. Class I

D. Class IV

 

2. The wax used for the fabrication of wax patterns for cast restorations as part of the lost-wax technique is _______ wax.

A. impression

B. utility

C. registration

D. inlay

 

3. Which cement is known for its ability to stimulate the formation of secondary dentin?

A. Calcium hydroxide

B. Zinc phosphate

C. ZOE

D. Polycarboxylate

 

4. Often, caries will develop in an area of the tooth that’s not readily accessible. Which cavity preparation form defines this?

A. Resistance

B. Retention

C. Outline

D. Convenience

 

5. Which drug administration route produces the most rapid drug response and has an almost immediate onset of action?

A. Topical

B. Oral

C. Inhalational

D. Injectable

 

6. The impression materials of choice for crown and bridge impressions include all the following, except

A. polyvinylsiloxane.

B. polysulfide.

C. polyether.

D. alginate.

 

7. Which of the following is not part of the anesthetic syringe?

A. Threaded tip

B. Loading coil

C. Piston

D. Harpoon

 

8. What cement should generally not be used with acrylic temporaries that will be placed a long time?

A. Polycarboxylate

B. Zinc oxide noneugenol

C. ZOE

D. Calcium hydroxide

 

9. Which of these instruments is used to create the anatomy in an amalgam restoration?

A. Excavator

B. Carver

C. Burnisher

D. Carrier

 

10. Dental alloy is composed of three primary metals. Which of the following is not one of the three primary metals?

A. Silver

B. Copper

C. Tin

D. Lead

 

11. Alginate is another name for

A. reversible hydrocolloid.

B. irreversible hydrocolloid.

C. polyether.

D. polysiloxane.

 

12. Polyether impression materials are available in all viscosities, except

A. light-body.

B. heavy-body.

C. putty.

D. medium-body.

 

13. Which one of the following classes of controlled substances are experimental drugs and can’t be administered to patients?

A. Class VII

B. Class V

C. Class II

D. Class I

 

14. A point angle of a cavity preparation involves how many surfaces?

A. Two

B. Four

C. Three

D. One

 

15. Water cooled trays are used with which impression material?

A. Reversible hydrocolloid

B. Zinc oxide and eugenol paste

C. Addition-reaction silicone (polysiloxane)

D. Polyether

 

16. The base of a dental cast is trimmed using

A. boxing wax.

B. a hydrocolloid conditioner.

C. a model trimmer.

D. a vibrator.

 

17. Which of the following is not a stage of general anesthesia?

A. Surgical

B. Analgesia

C. Anxiety

D. Excitement

 

18. Which of the following is the reason for aspirating prior to injection?

A. To withdraw any excess fluid in the tissues

B. To prevent the injection of medication into a blood vessel

C. To reduce the pain of injection

D. To determine if the syringe is in working order

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