Question 1

The recommended concentration of epinephrine to combine with lidocaine is __ when hemostasis is needed.

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 2

No justification exists for the use of epinephrine in a concentration greater than 1:200,000,except in cases in which hemostasis is needed.

Accepted Answer

A) True 
 B)False

Question 3

Cross-hypersensitivity has been found between lidocaine and which other dental local anesthetic?

Accepted Answer

A) Mepivacaine 
B) Prilocaine 
C) Bupivacaine 
D) Articaine 
E) None of the above 
A) Mepivacaine 
B) Prilocaine 
C) Bupivacaine 
D) Articaine 
E) None of the above

Question 4

The recommended concentration of epinephrine to combine with a local anesthetic is 1:200,000 for most procedures.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following statements is true of mepivacaine?

Accepted Answer

A) Cross-allergenicity has been demonstrated between mepivacaine and other currently available amides. 
B) Mepivacaine is effective topically. 
C) Mepivacaine can be used as a 3% solution without a vasoconstrictor. 
D) The benefit of a shorter duration of anesthesia warrants eliminating the vasoconstrictor. 
A) Cross-allergenicity has been demonstrated between mepivacaine and other currently available amides. 
B) Mepivacaine is effective topically. 
C) Mepivacaine can be used as a 3% solution without a vasoconstrictor. 
D) The benefit of a shorter duration of anesthesia warrants eliminating the vasoconstrictor.

Question 6

Prilocaine plain has a duration of action slightly _____ than mepivacaine plain,and prilocaine with epinephrine has a duration of action slightly _____ than lidocaine with epinephrine.

Accepted Answer

A) shorter;shorter 
B) shorter;longer 
C) longer;shorter 
D) longer;longer 
A) shorter;shorter 
B) shorter;longer 
C) longer;shorter 
D) longer;longer

Question 7

Patients who are allergic to procaine are not likely to display cross-hypersensitivity to lidocaine.

Accepted Answer

A) True 
 B)False

Question 8

Which local anesthetic agent is derived from thiophene?

Accepted Answer

A) Tetracaine 
B) Bupivacaine 
C) Articaine 
D) Propoxycaine 
A) Tetracaine 
B) Bupivacaine 
C) Articaine 
D) Propoxycaine

Question 9

Which of the following local anesthetic agents is both an ester and an amide?

Accepted Answer

A) Benzonatate 
B) Articaine 
C) Bupivacaine 
D) Dyclonine 
A) Benzonatate 
B) Articaine 
C) Bupivacaine 
D) Dyclonine

Question 10

Procaine (Novocaine)is metabolized primarily by the

Accepted Answer

A) liver. 
B) lungs. 
C) plasma. 
D) kidneys. 
A) liver. 
B) lungs. 
C) plasma. 
D) kidneys.

Question 11

Plain anesthetics without vasoconstrictor will exhibit a _____ duration of action and result in a _____ rapid buildup of a systemic blood level.

Accepted Answer

A) shorter;less 
B) shorter;more 
C) longer;less 
D) longer;more 
A) shorter;less 
B) shorter;more 
C) longer;less 
D) longer;more

Question 12

The correct ADA color code for articaine 4% with epinephrine 1:100,000 is

Accepted Answer

A) black. 
B) green. 
C) red. 
D) gold. 
E) brown. 
A) black. 
B) green. 
C) red. 
D) gold. 
E) brown.

Question 13

Epinephrine is combined with local anesthetics so as to

Accepted Answer

A) enhance absorption. 
B) prolong duration of action. 
C) delay onset. 
D) increase potency. 
A) enhance absorption. 
B) prolong duration of action. 
C) delay onset. 
D) increase potency.

Question 14

Several cases of methemoglobinemia have been reported after the use of

Accepted Answer

A) lidocaine. 
B) mepivacaine. 
C) prilocaine. 
D) articaine. 
A) lidocaine. 
B) mepivacaine. 
C) prilocaine. 
D) articaine.

Question 15

Patients with uncontrolled high blood pressure,hyperthyroidism,angina pectoris,and cardiac arrhythmias and those who have had a myocardial infarction or cerebrovascular accident in the past _____ should make an appointment for elective dental treatment only after their medical condition is under control.

Accepted Answer

A) 6 weeks 
B) 3 months 
C) 6 months 
D) 12 months 
A) 6 weeks 
B) 3 months 
C) 6 months 
D) 12 months

Question 16

Levonordefrin is more potent than epinephrine.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following agents is the most common topical local anesthetic?

Accepted Answer

A) Lidocaine 
B) Benzocaine 
C) Tetracaine 
D) Dyclonine 
A) Lidocaine 
B) Benzocaine 
C) Tetracaine 
D) Dyclonine

Question 18

Which of the following dental local anesthetics are available without vasoconstrictor? (Select all that apply. )

Accepted Answer

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

Question 19

Which portion of the chemical structure of a typical local anesthetic is considered lipophilic (lipid soluble)?

Accepted Answer

A) Aromatic nucleus 
B) Amino group 
C) Both A and B 
D) Neither A nor B 
A) Aromatic nucleus 
B) Amino group 
C) Both A and B 
D) Neither A nor B

Exam 9: Local Anesthetics

The recommended concentration of epinephrine to combine with lidocaine is __ when hemostasis is needed.

No justification exists for the use of epinephrine in a concentration greater than 1:200,000,except in cases in which hemostasis is needed.

Cross-hypersensitivity has been found between lidocaine and which other dental local anesthetic?

The recommended concentration of epinephrine to combine with a local anesthetic is 1:200,000 for most procedures.

Which of the following statements is true of mepivacaine?

Prilocaine plain has a duration of action slightly _____ than mepivacaine plain,and prilocaine with epinephrine has a duration of action slightly _____ than lidocaine with epinephrine.

Patients who are allergic to procaine are not likely to display cross-hypersensitivity to lidocaine.

Which local anesthetic agent is derived from thiophene?

Which of the following local anesthetic agents is both an ester and an amide?

Procaine (Novocaine)is metabolized primarily by the

Plain anesthetics without vasoconstrictor will exhibit a _____ duration of action and result in a _____ rapid buildup of a systemic blood level.

The correct ADA color code for articaine 4% with epinephrine 1:100,000 is

Epinephrine is combined with local anesthetics so as to

Several cases of methemoglobinemia have been reported after the use of

Levonordefrin is more potent than epinephrine.

Which of the following agents is the most common topical local anesthetic?

Which of the following dental local anesthetics are available without vasoconstrictor? (Select all that apply. )

Which portion of the chemical structure of a typical local anesthetic is considered lipophilic (lipid soluble)?

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Prilocaine plain has a duration of action slightly _ than mepivacaine plain,and prilocaine with epinephrine has a duration of action slightly _ than lidocaine with epinephrine.

Plain anesthetics without vasoconstrictor will exhibit a _ duration of action and result in a _ rapid buildup of a systemic blood level.