WREB UPDATED ACTUAL Exam
Questions and CORRECT Answers
If an injection is done 2x and still doesn't produce pain control, why is that? - CORRECT
ANSWER - Lower pH of tissue, edema, hemmorrhage or transedation of surrounding
areas.
Why is anesthesia not as effective when there is an infection? - CORRECT ANSWER -
pH of tissues is too low to allow anesthetic to penetrate the nerve.
What is the largest fiber with the most rapid conducting axons and transmits SHARP dental
pain? - CORRECT ANSWER - an A Fiber
What fibers are not involved in dental
Pain? - CORRECT ANSWER - B fibers
What is the smallest fiber, has no myelin sheath, and causes DULL BURNING pain? -
CORRECT ANSWER - a C Fiber
What can happen with toxic blood levels? - CORRECT ANSWER - Anesthesia depresses
the CNS and causes pt. To have convulsions.
Ester anesthetics are metabolized in the blood stream by - CORRECT ANSWER - Pseudo
cholinesterase
Esters see contraindicated in pt. Who have - CORRECT ANSWER - Atypical pseudo-
cholinesterase production
Amides metabolized by _________ except PRILOCAINE, which is metabolized in the
________. - CORRECT ANSWER - Liver; lungs
, Why are vasoconstrictors added to local anesthesia? - CORRECT ANSWER - Decrease
absorption, blood flow at injection site, toxicity, prolong effectiveness and working time, and
constricts blood vessels
What are the most commonly used vasoconstrictors used in dentistry? - CORRECT
ANSWER - Epi and levinorefrin
Epi is good for what? - CORRECT ANSWER - Hemostatis
What is the recommended topical form of Lidocaine? - CORRECT ANSWER - 200mg
What is the most common anesthesic used today? - CORRECT ANSWER - Lido with epi
( 1:100,000)
Why is Mepivicaine (3%) plain used? - CORRECT ANSWER - Pt. Who can't have epi or
for short procedures
What anesthetic do you use if you want pulpal anesthesia for longer appointments or when post
operative pain is anticipated? - CORRECT ANSWER - Bupivicaine
Why is Bupivicaine not recommended to children or handicapped pt? - CORRECT
ANSWER - Increase postoperative injury (chewing on lips)
Why would there be mild burning sensation during administration of anesthesia? - CORRECT
ANSWER - pH of solution, too warm, contamination
Does an artery or vein cause hematoma - CORRECT ANSWER - Artery
Questions and CORRECT Answers
If an injection is done 2x and still doesn't produce pain control, why is that? - CORRECT
ANSWER - Lower pH of tissue, edema, hemmorrhage or transedation of surrounding
areas.
Why is anesthesia not as effective when there is an infection? - CORRECT ANSWER -
pH of tissues is too low to allow anesthetic to penetrate the nerve.
What is the largest fiber with the most rapid conducting axons and transmits SHARP dental
pain? - CORRECT ANSWER - an A Fiber
What fibers are not involved in dental
Pain? - CORRECT ANSWER - B fibers
What is the smallest fiber, has no myelin sheath, and causes DULL BURNING pain? -
CORRECT ANSWER - a C Fiber
What can happen with toxic blood levels? - CORRECT ANSWER - Anesthesia depresses
the CNS and causes pt. To have convulsions.
Ester anesthetics are metabolized in the blood stream by - CORRECT ANSWER - Pseudo
cholinesterase
Esters see contraindicated in pt. Who have - CORRECT ANSWER - Atypical pseudo-
cholinesterase production
Amides metabolized by _________ except PRILOCAINE, which is metabolized in the
________. - CORRECT ANSWER - Liver; lungs
, Why are vasoconstrictors added to local anesthesia? - CORRECT ANSWER - Decrease
absorption, blood flow at injection site, toxicity, prolong effectiveness and working time, and
constricts blood vessels
What are the most commonly used vasoconstrictors used in dentistry? - CORRECT
ANSWER - Epi and levinorefrin
Epi is good for what? - CORRECT ANSWER - Hemostatis
What is the recommended topical form of Lidocaine? - CORRECT ANSWER - 200mg
What is the most common anesthesic used today? - CORRECT ANSWER - Lido with epi
( 1:100,000)
Why is Mepivicaine (3%) plain used? - CORRECT ANSWER - Pt. Who can't have epi or
for short procedures
What anesthetic do you use if you want pulpal anesthesia for longer appointments or when post
operative pain is anticipated? - CORRECT ANSWER - Bupivicaine
Why is Bupivicaine not recommended to children or handicapped pt? - CORRECT
ANSWER - Increase postoperative injury (chewing on lips)
Why would there be mild burning sensation during administration of anesthesia? - CORRECT
ANSWER - pH of solution, too warm, contamination
Does an artery or vein cause hematoma - CORRECT ANSWER - Artery
