LOCAL ANESTHESIA UPDATED EXAMS TEST PAPER
QUESTIONS AND ANSWERS SURE A+
✔✔What is the needle insertion site for the buccal nerve block?
a. mucogingival junction around the mandibular molars
b. mucobuccal fold around the mandibular first molar
c. buccal mucosa around the mandibular last molar
d. buccal mucosa around the mandibular premolars - ✔✔c. buccal mucosa around the
mandibular last molar
buccal nerve anesthetizes buccal soft tissue and periosteum.
does not provide anesthesia to the teeth
insertion: buccal mucosa at the height of the occlusal plane, distal to last molar.
✔✔Which of the following is FALSE regarding a buccal nerve block?
a. the needle is inserted on the buccal mucosa
b. the needle insertion depth is 10 mm
c. it anesthetizes the buccal mucosa of the molars
d. 0.2 ml of local is needed - ✔✔b. the needle insertion depth is 10 mm
,only 1-4 mm of needle tip should be inserted
✔✔Which of the following injection technique provides the longest duration of
anesthesia?
a. Field block
b. Nerve block
c. Infiltration - ✔✔b. Nerve block
✔✔Which of the following anesthetics is contraindicated for patients who are allergic to
para-aminobenzoic acid?
a. topical benzocaine
b. EMLA
c. Lidocaine
d. Prilocaine - ✔✔a. topical benzocaine
✔✔Topical anesthetics are less affective on which type of tissue?
a. Non-keratinized tissue
b. Keratinized tissue
c. The effect on both types of tissues is equal - ✔✔b. Keratinized tissue
keratinized: tough, waterproof
ex: gingiva, hard palate
✔✔What type of injection most efficiently provides hemostasis?
a. Nerve block
b. Field block
c. Infiltration
d. All of the above - ✔✔c. Infiltration
Field blocks: anesthetic deposited above apex
nerve block: target root trunk which is further away from nerve endings
infiltration: directly in area
✔✔How much anesthetic should be used for a posterior superior alveolar nerve block?
a. less than 0.9 ml
b. 0.9 ml
, c. 0.9-1.8 ml
d. 1.8 - 3.6 - ✔✔c. 0.9-1.8 ml
PSA: 0.9 - 1.8 ml
ASA: 0.9 - 1.2 ml
MSA: 0.9 - 1.2 ml
GP: 0.45 - 0.6 ml
GP: 0.45 ml
Mental: 0.6 ml
Buccal: 0.3 ml
IA: 1.5 ml
✔✔What is the combination of drugs present in EMLA (eutectic mix of local anesthetic)?
a. 2.5% lido and 2.5% xylocaine
b. 2.5% lido and 2.5% prilocaine
c. 2.5% lidocaine and 2.5% benzocaine
d. 2.5 benzocaine - ✔✔b. 2.5% lido and 2.5% prilocaine
EMLA: lido and prilocaine in a topical cream form
It is a surface anesthesia for intact skin. Contraindicated for pts with
methemoglobinemia.
✔✔To accomplish complete anesthesia of the right side palate, which injections are
needed?
a. GP nerve block
b. GP and NP nerve block
c. GP, NP and PSA nerve block
d. GP, NP, PSA and infiltration - ✔✔b. GP and NP nerve block
PSA: does not anesthetize palate
GP: anesthetize palatal soft tissues frm posterior to pm
NP: anesthetize anterior palatal tissue and bone (canine to canine)
✔✔When providing an inferior alveolar nerve block, the solution should be deposited
above which of the following foramen?
a. infraorbital
b. mental
c. mandibular
d. incisive - ✔✔c. mandibular foramen
QUESTIONS AND ANSWERS SURE A+
✔✔What is the needle insertion site for the buccal nerve block?
a. mucogingival junction around the mandibular molars
b. mucobuccal fold around the mandibular first molar
c. buccal mucosa around the mandibular last molar
d. buccal mucosa around the mandibular premolars - ✔✔c. buccal mucosa around the
mandibular last molar
buccal nerve anesthetizes buccal soft tissue and periosteum.
does not provide anesthesia to the teeth
insertion: buccal mucosa at the height of the occlusal plane, distal to last molar.
✔✔Which of the following is FALSE regarding a buccal nerve block?
a. the needle is inserted on the buccal mucosa
b. the needle insertion depth is 10 mm
c. it anesthetizes the buccal mucosa of the molars
d. 0.2 ml of local is needed - ✔✔b. the needle insertion depth is 10 mm
,only 1-4 mm of needle tip should be inserted
✔✔Which of the following injection technique provides the longest duration of
anesthesia?
a. Field block
b. Nerve block
c. Infiltration - ✔✔b. Nerve block
✔✔Which of the following anesthetics is contraindicated for patients who are allergic to
para-aminobenzoic acid?
a. topical benzocaine
b. EMLA
c. Lidocaine
d. Prilocaine - ✔✔a. topical benzocaine
✔✔Topical anesthetics are less affective on which type of tissue?
a. Non-keratinized tissue
b. Keratinized tissue
c. The effect on both types of tissues is equal - ✔✔b. Keratinized tissue
keratinized: tough, waterproof
ex: gingiva, hard palate
✔✔What type of injection most efficiently provides hemostasis?
a. Nerve block
b. Field block
c. Infiltration
d. All of the above - ✔✔c. Infiltration
Field blocks: anesthetic deposited above apex
nerve block: target root trunk which is further away from nerve endings
infiltration: directly in area
✔✔How much anesthetic should be used for a posterior superior alveolar nerve block?
a. less than 0.9 ml
b. 0.9 ml
, c. 0.9-1.8 ml
d. 1.8 - 3.6 - ✔✔c. 0.9-1.8 ml
PSA: 0.9 - 1.8 ml
ASA: 0.9 - 1.2 ml
MSA: 0.9 - 1.2 ml
GP: 0.45 - 0.6 ml
GP: 0.45 ml
Mental: 0.6 ml
Buccal: 0.3 ml
IA: 1.5 ml
✔✔What is the combination of drugs present in EMLA (eutectic mix of local anesthetic)?
a. 2.5% lido and 2.5% xylocaine
b. 2.5% lido and 2.5% prilocaine
c. 2.5% lidocaine and 2.5% benzocaine
d. 2.5 benzocaine - ✔✔b. 2.5% lido and 2.5% prilocaine
EMLA: lido and prilocaine in a topical cream form
It is a surface anesthesia for intact skin. Contraindicated for pts with
methemoglobinemia.
✔✔To accomplish complete anesthesia of the right side palate, which injections are
needed?
a. GP nerve block
b. GP and NP nerve block
c. GP, NP and PSA nerve block
d. GP, NP, PSA and infiltration - ✔✔b. GP and NP nerve block
PSA: does not anesthetize palate
GP: anesthetize palatal soft tissues frm posterior to pm
NP: anesthetize anterior palatal tissue and bone (canine to canine)
✔✔When providing an inferior alveolar nerve block, the solution should be deposited
above which of the following foramen?
a. infraorbital
b. mental
c. mandibular
d. incisive - ✔✔c. mandibular foramen
