CDCA LOCAL ANESTHESIA EXAM STUDY
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. What area is anesthetized by the mental nerve block? - ANSWER ✔ buccal
mucous membranes from mental foramen to midline
lower lip
chin
note: does NOT anesthetize teeth
2. what is the target area for the mental nerve block - ANSWER ✔ the mental
foramen between the mandibular premolars
3. what is the landmark for the mental nerve block - ANSWER ✔ mucobuccal
fold of the mandibular premolars
4. what is the type of needle used for a mental nerve block - ANSWER ✔ 25-
27 gauge short
5. what is the injection depth of the mental nerve block - ANSWER ✔ 5-6 mm
6. what is the technique for administering the mental nerve block (6) -
ANSWER ✔ ask the pt to partially close the jaw
retract lip
, insert needle at mucobuccal fold by the first premolar or canine
aspirate
deposit anesthetic
7. What is methemoglobinemia and what LA can cause it - ANSWER ✔
abnormal hemoglobin with reduced oxygen binding capacity
prilocaine
8. what are the signs/symptoms of methemoglobinemia (2) - ANSWER ✔
cyanosis and respiratory distress
9. what LA has been reported to cause higher incidents of paresthesia with LA
blocks - ANSWER ✔ prilocaine
10.what is the MRD in mg/lb of articaine (sepotocaine) - ANSWER ✔ 3.2
mg/lb
11.how long does ___________ articaine (septocaine) last in nerve blocks and
soft tissue
4% 1:100,000
4% 1:200,000 - ANSWER ✔ 100,000 - 60-75 min block and 3-6 hr soft
tissue
200,000 - 45-60 min block and 2-5 hr soft tissue
12.what is the MRD of bupivicaine (marcaine) in mg and mg/lb - ANSWER ✔
90 mg and 0.9 mg/lb
13.The patient experiences burning during injection- what is the probable
cause? - ANSWER ✔ Injected too fast
,14.Patient has significant infection. What caused the difficulty of the patient
achieving anesthesia? - ANSWER ✔ pH balance of infection creates acidic
environment, LA cannot bind to nerve receptors.
15.What probably caused a lesion on the lower lip that was present the
following day of a local anesthesia injection? - ANSWER ✔ Self-injury
16.What is the volume of a single cartridge of local anesthetic? - ANSWER ✔
1.8 ml
17.What is the purpose of sodium bisulfite being added to anesthetic? -
ANSWER ✔ preservative for vasoconstrictor
18.What function does sodium chloride provide in anesthetic solution? -
ANSWER ✔ tissue compatibility
19.What are sign and symptoms of early to ideal sedation? - ANSWER ✔ -
Facial muscl relax
-light- headedness
-Tingling/numbness
-light or floating feeling
-mouth remains opened
-Vital signs are normal
-Regular Breathing
-Skin has a slight flush
20.What are sign and symptoms of heavy sedation to slight overdose? -
ANSWER ✔ -Hearing acute
-Visual images confused
, -Sleepiness
-Laughing, crying, dreaming
-Nausea
-Mouth tends to close
-Less likely to respond
21.What are signs and symptoms of over sedation? - ANSWER ✔ -
Nausea/vomiting
-Mouth breathing
-Patient is uncomfortable
-Uncooperative
-Uncoordinated movements
-Patients responds irrationally
22.What are the management of over sedation? - ANSWER ✔ reduce N2O by 1
lpm. Use 100% of O2 flush if necessary, turn off N2O, use basic life support
and call 911 if needed.
23.What to do when a patient vomits? - ANSWER ✔ Turn the patients head to
the side to help clear the pharynx, turn off nitrous, and give 100% oxygen
for 5 minutes.
24.Concentration of ____ to ____ % will have a response of body warmth,
tingling of hands, and feet. - ANSWER ✔ 10 to 20%
25.Concentration of _____ to ____% will have a response of cummoral
numbness and numbness of the thighs. - ANSWER ✔ 20 to 30 %
26.What is the ideal level of sedation (% percentage) and the responses? -
ANSWER ✔ 20 to 40 %
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. What area is anesthetized by the mental nerve block? - ANSWER ✔ buccal
mucous membranes from mental foramen to midline
lower lip
chin
note: does NOT anesthetize teeth
2. what is the target area for the mental nerve block - ANSWER ✔ the mental
foramen between the mandibular premolars
3. what is the landmark for the mental nerve block - ANSWER ✔ mucobuccal
fold of the mandibular premolars
4. what is the type of needle used for a mental nerve block - ANSWER ✔ 25-
27 gauge short
5. what is the injection depth of the mental nerve block - ANSWER ✔ 5-6 mm
6. what is the technique for administering the mental nerve block (6) -
ANSWER ✔ ask the pt to partially close the jaw
retract lip
, insert needle at mucobuccal fold by the first premolar or canine
aspirate
deposit anesthetic
7. What is methemoglobinemia and what LA can cause it - ANSWER ✔
abnormal hemoglobin with reduced oxygen binding capacity
prilocaine
8. what are the signs/symptoms of methemoglobinemia (2) - ANSWER ✔
cyanosis and respiratory distress
9. what LA has been reported to cause higher incidents of paresthesia with LA
blocks - ANSWER ✔ prilocaine
10.what is the MRD in mg/lb of articaine (sepotocaine) - ANSWER ✔ 3.2
mg/lb
11.how long does ___________ articaine (septocaine) last in nerve blocks and
soft tissue
4% 1:100,000
4% 1:200,000 - ANSWER ✔ 100,000 - 60-75 min block and 3-6 hr soft
tissue
200,000 - 45-60 min block and 2-5 hr soft tissue
12.what is the MRD of bupivicaine (marcaine) in mg and mg/lb - ANSWER ✔
90 mg and 0.9 mg/lb
13.The patient experiences burning during injection- what is the probable
cause? - ANSWER ✔ Injected too fast
,14.Patient has significant infection. What caused the difficulty of the patient
achieving anesthesia? - ANSWER ✔ pH balance of infection creates acidic
environment, LA cannot bind to nerve receptors.
15.What probably caused a lesion on the lower lip that was present the
following day of a local anesthesia injection? - ANSWER ✔ Self-injury
16.What is the volume of a single cartridge of local anesthetic? - ANSWER ✔
1.8 ml
17.What is the purpose of sodium bisulfite being added to anesthetic? -
ANSWER ✔ preservative for vasoconstrictor
18.What function does sodium chloride provide in anesthetic solution? -
ANSWER ✔ tissue compatibility
19.What are sign and symptoms of early to ideal sedation? - ANSWER ✔ -
Facial muscl relax
-light- headedness
-Tingling/numbness
-light or floating feeling
-mouth remains opened
-Vital signs are normal
-Regular Breathing
-Skin has a slight flush
20.What are sign and symptoms of heavy sedation to slight overdose? -
ANSWER ✔ -Hearing acute
-Visual images confused
, -Sleepiness
-Laughing, crying, dreaming
-Nausea
-Mouth tends to close
-Less likely to respond
21.What are signs and symptoms of over sedation? - ANSWER ✔ -
Nausea/vomiting
-Mouth breathing
-Patient is uncomfortable
-Uncooperative
-Uncoordinated movements
-Patients responds irrationally
22.What are the management of over sedation? - ANSWER ✔ reduce N2O by 1
lpm. Use 100% of O2 flush if necessary, turn off N2O, use basic life support
and call 911 if needed.
23.What to do when a patient vomits? - ANSWER ✔ Turn the patients head to
the side to help clear the pharynx, turn off nitrous, and give 100% oxygen
for 5 minutes.
24.Concentration of ____ to ____ % will have a response of body warmth,
tingling of hands, and feet. - ANSWER ✔ 10 to 20%
25.Concentration of _____ to ____% will have a response of cummoral
numbness and numbness of the thighs. - ANSWER ✔ 20 to 30 %
26.What is the ideal level of sedation (% percentage) and the responses? -
ANSWER ✔ 20 to 40 %
