Local Anesthesia Prometric Exam Questions and
Answers.
If #15 has a periodontal abscess and you've already given the PSA, what other injection
will you need to numb the lingual? - Correct answer Greater Palatine
You are scaling the lingual of #13, where would you give the injection for an infiltration?
Mucobuccal fold, Mucogingival junction, free gingival margin, or apex of #13 - Correct
answer Free gingival margin
A central incisor has a periodontal defect on the lingual root surface, what injection
would you use? - Correct answer Nasopalatine
What is the treatment for a hematoma? - Correct answer Cold and compression for 12
hours
****You are seeing a patient for SRP and they have Cirrhosis of the liver, what
complications could arise from using an amide local anesthetic? - Correct answer
Patient has complications metabolizing the drug
*****What best describes a topical anesthetic? - Correct answer #1. Works on mucous
membranes. #2 not systemically toxic
*****Where would topical anesthetic be least affective? - Correct answer
Keratinized/palatal tissue
What is the shelf-life of LA? - Correct answer Expiration date on cartridge
What would happen if you administered 1 ml of solution per min?
A. No problems
B. Discomfort for patient - Correct answer No problems
Why doesn't LA work in infected areas? - Correct answer The infected area is more
acidic which does not allow ionization of sodium molecules
***0.2 mm for healthy
0.04 mm for cardiac pt - Correct answer What are the safe doses of epinephrine for a
cardiac patient and a healthy patient?
Some manufactures have changed how many mL of solution are in a cartridge. How
much would be administered if you had given 2 full cartridges? - Correct answer 3.4-3.6
Where is most likely to use a long needle? - Correct answer IA
, How much mL is in a single cartridge of LA? - Correct answer 1.8 ml
Which gauge has the smallest lumen? - Correct answer Smaller number, larger lumen
Which sensation is lost first? - Correct answer Pain
What function does sodium chloride provide in LA solutions? - Correct answer Makes
the solution isotonic
***What is the purpose of sodium bisulfate in LA? - Correct answer Antioxidant
preventing biodegration of LA
What do vasopressors do? - Correct answer Increases duration
What would cause a dry cornea? - Correct answer IA injection not contacting bone and
going into parotid gland - anesthesia to the facial nerve
Where does the mandibular nerve pass through in the skull? - Correct answer Foramen
Ovale
****Where does the nasopalatine nerve pass through? - Correct answer Incisive
foramen
Maxillary division of the trigeminal nerve is: - Correct answer Sensory
***Which nerve is NOT associated with the mandibular nerve branch? - Correct answer
Infraorbital
Where does the PSA not innervate? - Correct answer MB root of the maxillary 1st molar
****What injection is needed to anesthetize the lingual of maxillary anteriors? - Correct
answer Nasopalatine
****What injections are needed to anesthetize the entire palate on one side? - Correct
answer Greater Palatine and Nasopalatine
****How far do you insert the needle on the IA? - Correct answer 20-25 mm or 3/4
length of the needle
****What happens during depolarization? - Correct answer Sodium in and potassium out
Which local anesthetic is metabolized by pseudocholinesterase? - Correct answer
Esters
****Which has the highest occurrence of allergic reactions? - Correct answer Ester
(Benzocaine)
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