Local Anesthetics MCQs With Answers
1. Which is NOT a requirement for a local anesthetic drug?
a. Lipid solubility.
b. Water solubility.
c. Precipitate in interstitial fluid.
d. Depression of nerve conduction.
2. Which tissue characteristic produces an unfavorable response to intraoral local anesthetics?
a. Acidic pH.
b. Sensory neurons.
c. High-frequency nerve stimulation.
d. Nerve fibers smaller than 1 mm in diameter.
3. Most systemic adverse reactions to local anesthetics in a dental office can be treated effectively in which manner?
a. Send the patient home and reschedule the appointment.
b. Place the patient in a supine position and perform CPR.
c. Place the patient in a supine position and administer oxygen.
d. Establish an intravenous line and administer anticonvulsants.
4. Which component of a local anesthetic preparation is LEAST likely to cause an allergic reaction?
a. Metabisulfite.
b. Methylparaben.
c. Ester local anesthetic.
d. Amide local anesthetic.
5. Doses of local anesthetic in dentistry are represented by which fraction when compared to local anesthetic doses in medicine for compound nerve block or epidural injection?
a. 1/10.
b. 1/5.
c. 1/3.
d. 1/2.
6. Which local anesthetic is considered the standard choice for routine dental procedures?
a. 2% mepivacaine with levonordefrin.
b. 3% mepivacaine (without vasoconstrictor).
c. 0.5% bupivacaine with 1 : 200,000 epinephrine.
d. 2% lidocaine hydrochloride with 1 : 100,000 epinephrine.
7. The only amide local anesthetic marketed for topical use in dentistry is
a. articaine.
b. prilocaine.
c. lidocaine.
d. mepivacaine.
8. Which topical anesthetic is not indicated for use in the practice of general dentistry?
a. Cocaine.
b. Tetracaine.
c. Benzocaine.
d. Chlorobutanol.
