COMPREHENSIVE GUIDE TO LOCAL
ANESTHESIA: TYPES, TECHNIQUES,
AND SAFETY IN DENTISTRY. EXAM
QUESTIONS AND ANSWERS (VERIFIED
AND UPDATED)
Topical Anesthesia - ANS A procedure where a concentrated anesthetic agent is applied
directly to tissue to numb the area before an anesthetic injection.
Forms of Topical Anesthesia - ANS Ointment (gel), Spray, Liquid, Patch.
The most commonly used topical anesthetic.
Applied with a Q-tip for 2-5 minutes before the injection
Induction - ANS The time from when the injection is given until complete numbness occurs.
Duration - ANS The time from when the injection is given until the anesthetic wears off.
Short-Acting Duration - ANS Lasts 60-180 minutes.
Intermediate-Acting Duration - ANS Lasts 120-240 minutes.
@2026/2027 ALLRIGHTS RESERVED.
, Long-Acting Duration - ANS Lasts 240-540 minutes.
Vasoconstrictors - ANS Drugs added to anesthetic to increase the duration of anesthesia.
They decrease bleeding in the area.
Common Vasoconstrictors - ANS Epinephrine, Levonordefrin, Neo-Cobefrin.
1:50,000, 1:100,000, 1:200,000.
Important Rule for Ratios - ANS The lower the second number, the higher the amount of
vasoconstrictor.
Things to be cautious about before anesthesia - ANS High blood
pressure.HypertensionCardiovascular Disease.
Hyperthyroidism
Liver Disease
Kidney Disease
Pregnancy
Important Rule for Medical Conditions - ANS If these conditions appear in the medical
history, consult the doctor before preparing anesthetic.
What Determines the Injection Method - ANS The location and nerves of the tooth being
anesthetized.
Two Local Anesthesia Methods - ANS Infiltration, Block.
Infiltration Anesthesia - ANS Anesthetic solution injected into tissue near the apex of the
tooth being treated.
@2026/2027 ALLRIGHTS RESERVED.
ANESTHESIA: TYPES, TECHNIQUES,
AND SAFETY IN DENTISTRY. EXAM
QUESTIONS AND ANSWERS (VERIFIED
AND UPDATED)
Topical Anesthesia - ANS A procedure where a concentrated anesthetic agent is applied
directly to tissue to numb the area before an anesthetic injection.
Forms of Topical Anesthesia - ANS Ointment (gel), Spray, Liquid, Patch.
The most commonly used topical anesthetic.
Applied with a Q-tip for 2-5 minutes before the injection
Induction - ANS The time from when the injection is given until complete numbness occurs.
Duration - ANS The time from when the injection is given until the anesthetic wears off.
Short-Acting Duration - ANS Lasts 60-180 minutes.
Intermediate-Acting Duration - ANS Lasts 120-240 minutes.
@2026/2027 ALLRIGHTS RESERVED.
, Long-Acting Duration - ANS Lasts 240-540 minutes.
Vasoconstrictors - ANS Drugs added to anesthetic to increase the duration of anesthesia.
They decrease bleeding in the area.
Common Vasoconstrictors - ANS Epinephrine, Levonordefrin, Neo-Cobefrin.
1:50,000, 1:100,000, 1:200,000.
Important Rule for Ratios - ANS The lower the second number, the higher the amount of
vasoconstrictor.
Things to be cautious about before anesthesia - ANS High blood
pressure.HypertensionCardiovascular Disease.
Hyperthyroidism
Liver Disease
Kidney Disease
Pregnancy
Important Rule for Medical Conditions - ANS If these conditions appear in the medical
history, consult the doctor before preparing anesthetic.
What Determines the Injection Method - ANS The location and nerves of the tooth being
anesthetized.
Two Local Anesthesia Methods - ANS Infiltration, Block.
Infiltration Anesthesia - ANS Anesthetic solution injected into tissue near the apex of the
tooth being treated.
@2026/2027 ALLRIGHTS RESERVED.
