WREBS study UPDATED ACTUAL Exam
Questions and CORRECT Answers
What is the least amount of time it should take to administer 1 cartridge of local anesthetic? -
CORRECT ANSWER - 1-2 minutes
Which technique would best prevent an overdose reaction to a local anesthetic? - CORRECT
ANSWER - Injecting slowly
Mr. Holland requires local anesthetic for subgingival calculus removal. Within seconds after a
PSA nerve block injection, his face becomes extremely distended & swollen at the injection site.
What is the most likely cause for this reaction? - CORRECT ANSWER - Hematoma
A contraindication for a patient with an allergy to bisulfates would be - CORRECT
ANSWER - Anesthetic containing a vasoconstrictor (use plain)
The cardia dosage for a vasoconstrictor is - CORRECT ANSWER - 0.04mg/appointment
Epi exerts the greatest effect on the? - CORRECT ANSWER - Beta receptors
The primary effect of local anesthetic occur during the: - CORRECT ANSWER -
Depolarization phase
Your pt suddenly & unexpectedly moves so you contact the periosteum above #15, resulting in
breakage of the needle. The needle is lost & cannot be readily retrieved. All of the following
would be appropriate acts on your part except: - CORRECT ANSWER - Proceed with an
incision and or probe to locate the fragments
Which of the following local anesthesia's have the greatest propensity toward allergic reactions?
- CORRECT ANSWER - Procaine & benzocaine (esters)
, The palatal mucosa of the maxillary incisors is innervated by what nerve? - CORRECT
ANSWER - Nasopalatine nerve
What is the primary excretory organ for both types of LA? - CORRECT ANSWER -
Kidneys
If you administer 180 mg of 2% Lido with 1:100,000 epi to your healthy pt, how many cartridges
have you adminstered? - CORRECT ANSWER -5
What is the volume of LA solution in a typical dental cartridge? - CORRECT ANSWER -
1.8ml
Approximately how many cartridges of lido 2% plain can be given per appointment for a
healthy, 160lb male? - CORRECT ANSWER -8
Allergic reactions are commonly associated with the preservation used to prevent oxidation of
the vasoconstrictor. The preservation added to the cartridge is - CORRECT ANSWER -
Sodium bisulfite
If 2 cartridges of 2% lido 1:100,000 are administered, how many mg of epi did the patient
recieve? - CORRECT ANSWER - 0.036
To obtain adequate anesthesia to the IA nerve, the needle must be located - CORRECT
ANSWER - Superior to the mandibular foramen
A patient is experiencing an episode of hyperventilation. What is the appropriate emergency
treatment? - CORRECT ANSWER - Have the pt breath into cupped hands
Which solubility factor primarily determines an anesthetic agents potency? - CORRECT
ANSWER - Lipid
Questions and CORRECT Answers
What is the least amount of time it should take to administer 1 cartridge of local anesthetic? -
CORRECT ANSWER - 1-2 minutes
Which technique would best prevent an overdose reaction to a local anesthetic? - CORRECT
ANSWER - Injecting slowly
Mr. Holland requires local anesthetic for subgingival calculus removal. Within seconds after a
PSA nerve block injection, his face becomes extremely distended & swollen at the injection site.
What is the most likely cause for this reaction? - CORRECT ANSWER - Hematoma
A contraindication for a patient with an allergy to bisulfates would be - CORRECT
ANSWER - Anesthetic containing a vasoconstrictor (use plain)
The cardia dosage for a vasoconstrictor is - CORRECT ANSWER - 0.04mg/appointment
Epi exerts the greatest effect on the? - CORRECT ANSWER - Beta receptors
The primary effect of local anesthetic occur during the: - CORRECT ANSWER -
Depolarization phase
Your pt suddenly & unexpectedly moves so you contact the periosteum above #15, resulting in
breakage of the needle. The needle is lost & cannot be readily retrieved. All of the following
would be appropriate acts on your part except: - CORRECT ANSWER - Proceed with an
incision and or probe to locate the fragments
Which of the following local anesthesia's have the greatest propensity toward allergic reactions?
- CORRECT ANSWER - Procaine & benzocaine (esters)
, The palatal mucosa of the maxillary incisors is innervated by what nerve? - CORRECT
ANSWER - Nasopalatine nerve
What is the primary excretory organ for both types of LA? - CORRECT ANSWER -
Kidneys
If you administer 180 mg of 2% Lido with 1:100,000 epi to your healthy pt, how many cartridges
have you adminstered? - CORRECT ANSWER -5
What is the volume of LA solution in a typical dental cartridge? - CORRECT ANSWER -
1.8ml
Approximately how many cartridges of lido 2% plain can be given per appointment for a
healthy, 160lb male? - CORRECT ANSWER -8
Allergic reactions are commonly associated with the preservation used to prevent oxidation of
the vasoconstrictor. The preservation added to the cartridge is - CORRECT ANSWER -
Sodium bisulfite
If 2 cartridges of 2% lido 1:100,000 are administered, how many mg of epi did the patient
recieve? - CORRECT ANSWER - 0.036
To obtain adequate anesthesia to the IA nerve, the needle must be located - CORRECT
ANSWER - Superior to the mandibular foramen
A patient is experiencing an episode of hyperventilation. What is the appropriate emergency
treatment? - CORRECT ANSWER - Have the pt breath into cupped hands
Which solubility factor primarily determines an anesthetic agents potency? - CORRECT
ANSWER - Lipid
