Latest Updated 2024/2025 (Graded A+)
Where does the mandibular nerve pass through in the skull? - ✔✔Foramen Ovale
What is the maxillary division of the trigeminal nerve? - ✔✔Sensory
Which nerve is NOT associated with the mandibular nerve branch? - ✔✔Infraorbital nerve
Which teeth does the PSA injection innervate? - ✔✔1st, 2nd, and 3rd maxillary molars
* Does not innervate the mesiobuccal cusp of the maxillary 1st molar
Which injection is needed to anesthetize linguals of maxillary anteriors? - ✔✔Nasopalatine
Which injections are needed to anesthetize the entire palate on one side? - ✔✔Greater Palatine &
Nasopalatine
How far do you insert the needle on an IANB? - ✔✔20-25 mm or 3/4 the length of the needle
What happens during depolarization? - ✔✔- Sodium comes in
- Potassium goes out
When do you aspirate? - ✔✔Right before anesthetic is deposited
* This makes sure you do not insert the needle into a blood vessel
Which type of local anesthetic is metabolized by pseudocholinesterase (PABA)? - ✔✔Esters
,What kind of tissue is topical anesthetic least effective on? - ✔✔Keratinized tissues
What is true about topical anesthetics? - ✔✔There are no systemic problems with them
Which Ester has the highest occurrence of allergic reactions? - ✔✔Ester option; Benzocaine
* Only applied topically
What is the significance of giving an amide anesthetic to a patient with Cirrhosis? - ✔✔The amide
anesthetic is metabolized by the liver
What is the landmark for the IANB injection? - ✔✔Coronoid notch
Psychogenic pain - ✔✔No organic base for the pain
What is the maximum epinephrine dose for cardiac & normal patients? - ✔✔Cardiac- .04mg
Normal- .2mg
What is trismus? - ✔✔Limited opening of mouth
Management of hematoma - ✔✔Cold compression & pressure to bleeding site
Management of trismus - ✔✔- Heat therapy
- Saline rinses
- Asprin
- Jaw exercises
Hematoma can occur if needle penetrates into the pterygoid plexus of veins during which injection? -
✔✔PSA
, What needle should be used for infiltration? - ✔✔27 short
What is the solution volume of a single cartridge of LA? - ✔✔1.7-1.8 ml
Which antioxidant prevents biodegration of LA by stoping oxidation of a vasopressor? - ✔✔Sodium
bisulfite
What do vasopressors do? - ✔✔- Increases duration of LA
- Hemostasis (stops blood flow)
- Reduces chance of toxicity
What would cause a dry cornea? - ✔✔Anesthetizing the facial nerve (VII)
- The facial nerve can be anesthetized if bone is not contacted during an IANB injection and anesthetic is
deposited into the parotid gland causing bell's palsy
- Temporary bell's palsy will not allow the patients eyelid to blink or close, causing a dry cornea
How do you calculate the amount of epinephrine in a solution? - ✔✔1% solution = 10 X 1.8 (or 1.7) =
18mg (or 17mg)
2% solution = 20 X 1.8 (or 1.7) = 36mg (or 34 mg)
3% solution = 30 X 1.8 (or 1.7) = 54 mg (or 51 mg)
What are the causes of burning upon injection? - ✔✔- Acidic (low) pH of solution
-cartridge contains a vasoconstrictor (this lowers the pH of solution more than one without)
-overheated cartridge
- Cartridge being wiped with sterilizing solution (alcohol)
-cartridge was placed in disinfecting solution