CDCA LOCAL ANESTHESIA BOARD
EXAM 2026/2027 ACTUAL
QUESTIONS WITH VERIFIED
ANSWERS.
What is the antioxidant used as a preservative in local
anesthetics with a vasoconstrictor?
Sodium bisulfite.
Two most commonly occurring reactions to LA?
Vasopressor syncope and hyperventilation.
How should the barrel of the syringe be held for an IA
injection?
Over the mandibular premolars on the contralateral side.
If the patient is taking a sulfonamide which LA should be
avoided?
an ester.
What do you remove from the syringe first?
Cartridge.
Alpha 1:
excitatory post synaptic, cause of contraction of smooth
muscle.
Alpha 2:
inhibitory post synaptic.
, Beta receptors:
produce smooth muscle relaxation (vasodilation) and cardiac
stimulation (increase heart rate)
Beta 1:
responsible for cardiac stimulation and lipolysis.
Beta 2:
responsible for bronchodilation and vasodilation.
Infiltration aka supraperiosteal uses what gauge needle?
27 gauge.
When do you hit bone during the IA injection?
20-25mm or 2/3 way of the needle.
Name 2 esters.
Procaine, Propoxycaine and benzocaine.
Local anesthetic molecules bind to which part of the
nerve?
Axolemma.
Which of the following terms refers to the decreased
response to a drug after its repeated usage?
Thachyphylaxis.
Which of the following foramina is associated with the
maxillary division of the trigeminal nerve?
Foramen rotundum.
Local anesthetics mainly:
Decrease the rate of depolarization.
EXAM 2026/2027 ACTUAL
QUESTIONS WITH VERIFIED
ANSWERS.
What is the antioxidant used as a preservative in local
anesthetics with a vasoconstrictor?
Sodium bisulfite.
Two most commonly occurring reactions to LA?
Vasopressor syncope and hyperventilation.
How should the barrel of the syringe be held for an IA
injection?
Over the mandibular premolars on the contralateral side.
If the patient is taking a sulfonamide which LA should be
avoided?
an ester.
What do you remove from the syringe first?
Cartridge.
Alpha 1:
excitatory post synaptic, cause of contraction of smooth
muscle.
Alpha 2:
inhibitory post synaptic.
, Beta receptors:
produce smooth muscle relaxation (vasodilation) and cardiac
stimulation (increase heart rate)
Beta 1:
responsible for cardiac stimulation and lipolysis.
Beta 2:
responsible for bronchodilation and vasodilation.
Infiltration aka supraperiosteal uses what gauge needle?
27 gauge.
When do you hit bone during the IA injection?
20-25mm or 2/3 way of the needle.
Name 2 esters.
Procaine, Propoxycaine and benzocaine.
Local anesthetic molecules bind to which part of the
nerve?
Axolemma.
Which of the following terms refers to the decreased
response to a drug after its repeated usage?
Thachyphylaxis.
Which of the following foramina is associated with the
maxillary division of the trigeminal nerve?
Foramen rotundum.
Local anesthetics mainly:
Decrease the rate of depolarization.
