Question 1

Which of the following agents are the most likely to precipitate malignant hyperthermia: (1)halothane, (2)lidocaine, (3)mepivacaine, (4)succinylcholine?

Accepted Answer

A) 1,2,3,4 
B) 2,3,4 
C) 2,3 
D) 1,4 
A) 1,2,3,4 
B) 2,3,4 
C) 2,3 
D) 1,4

Question 2

Which of the following components of an injected amide local anesthetic agent may produce a hypersensitivity reaction that exhibits itself as an acute asthmatic attack?

Accepted Answer

A) The vasoconstrictor 
B) The antioxidant for the vasoconstrictor 
C) The sodium hydroxide 
D) The sodium chloride 
A) The vasoconstrictor 
B) The antioxidant for the vasoconstrictor 
C) The sodium hydroxide 
D) The sodium chloride

Question 3

Which of the following local anesthetics has the longest duration of action?

Accepted Answer

A) Lidocaine 
B) Mepivacaine 
C) Prilocaine 
D) Bupivacaine 
A) Lidocaine 
B) Mepivacaine 
C) Prilocaine 
D) Bupivacaine

Question 4

Which dental local anesthetic is an ester?

Accepted Answer

A) Lidocaine 
B) Mepivacaine 
C) Prilocaine 
D) Bupivacaine 
E) Benzocaine 
A) Lidocaine 
B) Mepivacaine 
C) Prilocaine 
D) Bupivacaine 
E) Benzocaine

Question 5

Repolarization of a nerve occurs by

Accepted Answer

A) influx of potassium. 
B) influx of sodium. 
C) efflux of potassium. 
D) efflux of calcium. 
E) None of the above 
A) influx of potassium. 
B) influx of sodium. 
C) efflux of potassium. 
D) efflux of calcium. 
E) None of the above

Question 6

Which local anesthetic will have the shortest duration of action?

Accepted Answer

A) Lidocaine (plain)without vasoconstrictor 
B) Lidocaine with vasoconstrictor 
C) Mepivacaine with vasoconstrictor 
D) Prilocaine with vasoconstrictor 
A) Lidocaine (plain)without vasoconstrictor 
B) Lidocaine with vasoconstrictor 
C) Mepivacaine with vasoconstrictor 
D) Prilocaine with vasoconstrictor

Question 7

_____ is an ester local anesthetic.

Accepted Answer

A) Prilocaine (Citanest) 
B) Tetracaine (Pontocaine) 
C) Bupivacaine (Marcaine) 
D) Lidocaine (Xylocaine) 
A) Prilocaine (Citanest) 
B) Tetracaine (Pontocaine) 
C) Bupivacaine (Marcaine) 
D) Lidocaine (Xylocaine)

Question 8

Which local anesthetic agent is neither an ester nor an amide?

Accepted Answer

A) Propoxycaine 
B) Dyclonine 
C) Articaine 
D) Lidocaine 
A) Propoxycaine 
B) Dyclonine 
C) Articaine 
D) Lidocaine

Question 9

Addition of vasoconstrictor to local anesthetic (1)reduces blood supply to the area, (2)increases blood supply to the area, (3)limits systemic absorption, (4)increases systemic absorption, (5)reduces systemic toxicity,and (6)increases systemic toxicity.Which of these are correct?

Accepted Answer

A) 1,3,5 
B) 1,4,5 
C) 2,3,5 
D) 2,3,6 
E) 2,4,6 
A) 1,3,5 
B) 1,4,5 
C) 2,3,5 
D) 2,3,6 
E) 2,4,6

Question 10

The maximum safe dose of epinephrine for the cardiac patient is _____ mg.

Accepted Answer

A) 0.02 
B) 0.04 
C) 0.2 
D) 0.4 
A) 0.02 
B) 0.04 
C) 0.2 
D) 0.4

Question 11

Amide local anesthetics are metabolized

Accepted Answer

A) by being hydrolyzed by plasma pseudocholinesterases. 
B) primarily by the liver. 
C) in the spleen. 
D) minimally and are excreted virtually unchanged. 
A) by being hydrolyzed by plasma pseudocholinesterases. 
B) primarily by the liver. 
C) in the spleen. 
D) minimally and are excreted virtually unchanged.

Question 12

The mechanism of local anesthetics involves action on

Accepted Answer

A) myelinated nerve. 
B) axons. 
C) sodium channels. 
D) Both A and C. 
E) Both B and C. 
A) myelinated nerve. 
B) axons. 
C) sodium channels. 
D) Both A and C. 
E) Both B and C.

Question 13

Levonordefrin is commonly combined with which local anesthetic?

Accepted Answer

A) Lidocaine 
B) Procaine 
C) Mepivacaine 
D) Bupivacaine 
A) Lidocaine 
B) Procaine 
C) Mepivacaine 
D) Bupivacaine

Question 14

Which is the concentration of levonordefrin (Neo-Cobefrin)used in dentistry?

Accepted Answer

A) 1:20,000 
B) 1:50,000 
C) 1:100,000 
D) 1:200,000 
A) 1:20,000 
B) 1:50,000 
C) 1:100,000 
D) 1:200,000

Question 15

A patient can produce endogenous epinephrine far in excess of that administered in dentistry in the presence of inadequate anesthesia.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following local anesthetics may be combined for injection-free local anesthesia?

Accepted Answer

A) Articaine and bupivacaine 
B) Lidocaine and prilocaine 
C) Benzocaine and tetracaine 
D) Lidocaine and articaine 
A) Articaine and bupivacaine 
B) Lidocaine and prilocaine 
C) Benzocaine and tetracaine 
D) Lidocaine and articaine

Question 17

The maximum safe dose of articaine 4% with 1:100,000 epinephrine is approximately _____ cartridges.

Accepted Answer

A) 5.5 
B) 6.9 
C) 8.5 
D) 11.5 
A) 5.5 
B) 6.9 
C) 8.5 
D) 11.5

Question 18

Which two agents are known to cause clinically significant drug interactions when combined with epinephrine?

Accepted Answer

A) Selective serotonin reuptake inhibitors and nonselective b-blockers 
B) Nonselective b-blockers and phenothiazines 
C) Tricyclic antidepressants and monoamine oxidase inhibitors 
D) Nonselective b-blockers antagonists and tricyclic antidepressants 
E) Benzodiazepines and monoamine oxidase inhibitors 
A) Selective serotonin reuptake inhibitors and nonselective b-blockers 
B) Nonselective b-blockers and phenothiazines 
C) Tricyclic antidepressants and monoamine oxidase inhibitors 
D) Nonselective b-blockers antagonists and tricyclic antidepressants 
E) Benzodiazepines and monoamine oxidase inhibitors

Question 19

Which of the following dental local anesthetic agents is available in a 1.7 ml dental cartridge unlike the more common 1.8 ml dental cartridge?

Accepted Answer

A) Lidocaine (Xylocaine,Octocaine) 
B) Bupivacaine (Marcaine) 
C) Mepivacaine (Carbocaine,Isocaine) 
D) Prilocaine (Citanest) 
E) Articaine (Septocaine) 
A) Lidocaine (Xylocaine,Octocaine) 
B) Bupivacaine (Marcaine) 
C) Mepivacaine (Carbocaine,Isocaine) 
D) Prilocaine (Citanest) 
E) Articaine (Septocaine)

Question 20

Which percentage of local anesthetic in a dental cartridge has the longest duration of action?

Accepted Answer

A) 0.5% 
B) 2% 
C) 3% 
D) 4% 
A) 0.5% 
B) 2% 
C) 3% 
D) 4%

Exam 9: Local Anesthetics

Which of the following agents are the most likely to precipitate malignant hyperthermia: (1)halothane, (2)lidocaine, (3)mepivacaine, (4)succinylcholine?

Which of the following components of an injected amide local anesthetic agent may produce a hypersensitivity reaction that exhibits itself as an acute asthmatic attack?

Which of the following local anesthetics has the longest duration of action?

Which dental local anesthetic is an ester?

Repolarization of a nerve occurs by

Which local anesthetic will have the shortest duration of action?

_____ is an ester local anesthetic.

Which local anesthetic agent is neither an ester nor an amide?

Addition of vasoconstrictor to local anesthetic (1)reduces blood supply to the area, (2)increases blood supply to the area, (3)limits systemic absorption, (4)increases systemic absorption, (5)reduces systemic toxicity,and (6)increases systemic toxicity.Which of these are correct?

The maximum safe dose of epinephrine for the cardiac patient is _____ mg.

Amide local anesthetics are metabolized

The mechanism of local anesthetics involves action on

Levonordefrin is commonly combined with which local anesthetic?

Which is the concentration of levonordefrin (Neo-Cobefrin)used in dentistry?

A patient can produce endogenous epinephrine far in excess of that administered in dentistry in the presence of inadequate anesthesia.

Which of the following local anesthetics may be combined for injection-free local anesthesia?

The maximum safe dose of articaine 4% with 1:100,000 epinephrine is approximately _____ cartridges.

Which two agents are known to cause clinically significant drug interactions when combined with epinephrine?

Which of the following dental local anesthetic agents is available in a 1.7 ml dental cartridge unlike the more common 1.8 ml dental cartridge?

Which percentage of local anesthetic in a dental cartridge has the longest duration of action?

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