LOCAL ANESTHESIA MOCK EXAM AND LOCAL ANESTHESIA
MOCK BOARD EXAM ACTUAL EXAM 300 QUESTIONS AND
CORRECT DETAILED ANSWERS
When a nerve is in its resting state, the: - ANSWER: K+ is concentrated outside the
cell.
Which of the following maintains the resting potential of a nerve fiber? - ANSWER:
The Na+ pump
Select the following anesthetic(s) available in the US that is(are) formulated with
epinephrine 1:200,000
A. Lidocaine
B. Mepivacaine
C. Prilocaine
D. Articaine
E. C and D - ANSWER: C and D
Which of the following anesthetics has the shortest duration when administering a
local anesthetic block? - ANSWER: Mepivacaine 3%
Levonordefrin has how many mg/mL of vasoconstrictor? - ANSWER: 0.05 mg/mL
How much epinephrine does a 1:200,000 dilution contain compared with a
1:100,000 dilution? - ANSWER: Half
What is the cardiac dose for epinephrine? - ANSWER: 0.04 mg
How many cartridges could a patient from the answer in question #7 safely receive if
administering a 1:200,000 epinephrine dilution? - ANSWER: 4.4 cartridges
What is the primary reason that catecholamines are added to local anesthetic
solutions? - ANSWER: Decrease the risk of toxicity
Sodium bicarbonate is added to local anesthetic solutions: - ANSWER: only when a
vasoconstrictor is added
How many mg of epinephrine are in one cartridge of a 1:100,000 dilution? -
ANSWER: 0.018 mg
During the inferior alveolar block the patient feels a sudden electrical shock. This is
due to: - ANSWER: the needle touching the lingual nerve.
, Supraperiosteal injections are less successful on the mandible because of the -
ANSWER: density of the bone of the mandible.
Which of the following vasoconstrictor dilutions provides the greatest hemostasis? -
ANSWER: 1:50,000 epinephrine
After the administration of a local anesthetic, what causes a droopy eyelid? -
ANSWER: Depositing the solution in the parotid gland.
Which anesthetic is primarily metabolized in the blood? - ANSWER: Articaine
What is the recommended needle gauge for an inferior alveolar block? - ANSWER: 25
gauge
Esters are metabolized by - ANSWER: plasma
Amides are metabolized by - ANSWER: liver
The dental hygienist successfully administers an inferior alveolar block, but the
patient does not get numb. What is the possible reason why the patient does not get
numb? - ANSWER: Solution deposited inferior to the mandibular foramen
Prolonged parasthesia of the anterior part of the tongue is caused by which nerve
being traumatized? - ANSWER: Lingual nerve
What is the main reason anesthesia fails to occur near an abscessed tooth? -
ANSWER: Infection causes a decrease in the pH of the tissue
Which of the following local anesthetics will provide the longest duration of action
following a nerve block when a vasoconstrictor is absolutely contraindicated? -
ANSWER: 4% prilocaine, pain
Which of the following nerves when anesthetized provides soft tissue anesthesia of
the lower lip and chin? - ANSWER: mental nerve
At the first indication of a hematoma, the clinician should: - ANSWER: apple pressure
to the area
What is the best explanation as to why a patient has a lesion on his or her lip the day
after receiving an inferior alveolar block? - ANSWER: self-mutilation
Local anesthetics work by penetrating the nerve to inhibit: - ANSWER: Na+ efflux
The coronoid notch is a landmark for which nerve block? - ANSWER: Inferior alveolar
block
MOCK BOARD EXAM ACTUAL EXAM 300 QUESTIONS AND
CORRECT DETAILED ANSWERS
When a nerve is in its resting state, the: - ANSWER: K+ is concentrated outside the
cell.
Which of the following maintains the resting potential of a nerve fiber? - ANSWER:
The Na+ pump
Select the following anesthetic(s) available in the US that is(are) formulated with
epinephrine 1:200,000
A. Lidocaine
B. Mepivacaine
C. Prilocaine
D. Articaine
E. C and D - ANSWER: C and D
Which of the following anesthetics has the shortest duration when administering a
local anesthetic block? - ANSWER: Mepivacaine 3%
Levonordefrin has how many mg/mL of vasoconstrictor? - ANSWER: 0.05 mg/mL
How much epinephrine does a 1:200,000 dilution contain compared with a
1:100,000 dilution? - ANSWER: Half
What is the cardiac dose for epinephrine? - ANSWER: 0.04 mg
How many cartridges could a patient from the answer in question #7 safely receive if
administering a 1:200,000 epinephrine dilution? - ANSWER: 4.4 cartridges
What is the primary reason that catecholamines are added to local anesthetic
solutions? - ANSWER: Decrease the risk of toxicity
Sodium bicarbonate is added to local anesthetic solutions: - ANSWER: only when a
vasoconstrictor is added
How many mg of epinephrine are in one cartridge of a 1:100,000 dilution? -
ANSWER: 0.018 mg
During the inferior alveolar block the patient feels a sudden electrical shock. This is
due to: - ANSWER: the needle touching the lingual nerve.
, Supraperiosteal injections are less successful on the mandible because of the -
ANSWER: density of the bone of the mandible.
Which of the following vasoconstrictor dilutions provides the greatest hemostasis? -
ANSWER: 1:50,000 epinephrine
After the administration of a local anesthetic, what causes a droopy eyelid? -
ANSWER: Depositing the solution in the parotid gland.
Which anesthetic is primarily metabolized in the blood? - ANSWER: Articaine
What is the recommended needle gauge for an inferior alveolar block? - ANSWER: 25
gauge
Esters are metabolized by - ANSWER: plasma
Amides are metabolized by - ANSWER: liver
The dental hygienist successfully administers an inferior alveolar block, but the
patient does not get numb. What is the possible reason why the patient does not get
numb? - ANSWER: Solution deposited inferior to the mandibular foramen
Prolonged parasthesia of the anterior part of the tongue is caused by which nerve
being traumatized? - ANSWER: Lingual nerve
What is the main reason anesthesia fails to occur near an abscessed tooth? -
ANSWER: Infection causes a decrease in the pH of the tissue
Which of the following local anesthetics will provide the longest duration of action
following a nerve block when a vasoconstrictor is absolutely contraindicated? -
ANSWER: 4% prilocaine, pain
Which of the following nerves when anesthetized provides soft tissue anesthesia of
the lower lip and chin? - ANSWER: mental nerve
At the first indication of a hematoma, the clinician should: - ANSWER: apple pressure
to the area
What is the best explanation as to why a patient has a lesion on his or her lip the day
after receiving an inferior alveolar block? - ANSWER: self-mutilation
Local anesthetics work by penetrating the nerve to inhibit: - ANSWER: Na+ efflux
The coronoid notch is a landmark for which nerve block? - ANSWER: Inferior alveolar
block
