DENTAL HYGIENE LOCAL ANESTHESIA TEST WITH
CORRECT SOLUTIONS #6
Where mandibular nerve passes through in the skull - correct answer Foramen Ovale
Where nasopalatine nerve passes through - correct answer Incisive Foramen
Maxillary division of Trigeminal Nerve is - correct answer Sensory
Nerve NOT associated with the mandibular nerve branch - correct answer Infraorbital
nerve
Teeth that PSA innervates - correct answer 1st, 2nd, and 3rd maxillary molars, but may
not innervate MB root of the maxillary 1st molar
What injection is needed to anesthetize linguals of max 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 an IANB? - correct answer 20-25 mm or 3/4 the
length of the needle
What happens during depolarization? - correct answer Sodium in and Potassium out
When do you aspirate? - correct answer Right before anesthetic is to be deposited
Which local anesthetic is metabolized by pseudocholinesterase? - correct answer
Esters
Topical anesthetics are least effective on? - correct answer Keratinized tissues
Which is true of topical anesthetics? - correct answer No systemic problems
Which has the highest occurrence of allergic reactions - correct answer Ester option;
Benzocaine.
What is the significance of giving an amide anesthetic to a patient with cirrhosis? -
correct answer Due to amide anesthetics being metabolized by the liver.
What is the landmark for the IANB injection? - correct answer Coronoid notch
Psychogenic pain - correct answer No organic base for the pain
Max epi dose for cardiac & normal pt - correct answer Cardiac- .04mg
, Normal- .2mg
What is trismus? - correct answer Limited opening of mouth
Management of hematoma - correct answer Cold compression and pressure to bleeding
site
Management of trismus - correct answer Heat therapy, saline rinses, asprin and jaw
exercises
Hematoma can occur if needle penetrates into the pterygoid plexus of veins during
which injection? - correct answer PSA
What needle should be used for infiltration? - correct answer 27g short
Volume of solution of a single cartridge of LA - correct answer 1.8-1.7ml
Antioxidant preventing biodegration of LA by preventing oxidation of vasopressor by
oxygen - correct answer Sodium bisulfite
Actions of vasopressors - correct answer Increase duration of LA, hemostasis, reduce
chance of toxicity
What would cause a dry cornea? - correct answer Anesthetizing the facial nerve. The
facial nerve can be anesthetized if bone is not contacted during the IANB and
anesthetic solution is deposited into the parotid gland. Temporary bell's palsy would not
allow the patients eyelid to blink or close, which would cause the dry eye.
How to calculate amount of epi in a solution - correct answer 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)
Cause of burning upon injection - correct answer acidic ph of solution, injection too fast,
cartridge being wiped with alcohol or sterilizing solution.
Cause of needle breakage - correct answer Bending needle, patient movement
Why would a patient receive an electric shock during delivery of anesthesia? - correct
answer Needle touched the nerve sheath
Ongoing numbness of the anterior 2/3 of tongue is caused by which nerve being
anesthetized? - correct answer Lingual Nerve
What is the benefit of slow deposition rate? - correct answer Less pain, less
complications
CORRECT SOLUTIONS #6
Where mandibular nerve passes through in the skull - correct answer Foramen Ovale
Where nasopalatine nerve passes through - correct answer Incisive Foramen
Maxillary division of Trigeminal Nerve is - correct answer Sensory
Nerve NOT associated with the mandibular nerve branch - correct answer Infraorbital
nerve
Teeth that PSA innervates - correct answer 1st, 2nd, and 3rd maxillary molars, but may
not innervate MB root of the maxillary 1st molar
What injection is needed to anesthetize linguals of max 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 an IANB? - correct answer 20-25 mm or 3/4 the
length of the needle
What happens during depolarization? - correct answer Sodium in and Potassium out
When do you aspirate? - correct answer Right before anesthetic is to be deposited
Which local anesthetic is metabolized by pseudocholinesterase? - correct answer
Esters
Topical anesthetics are least effective on? - correct answer Keratinized tissues
Which is true of topical anesthetics? - correct answer No systemic problems
Which has the highest occurrence of allergic reactions - correct answer Ester option;
Benzocaine.
What is the significance of giving an amide anesthetic to a patient with cirrhosis? -
correct answer Due to amide anesthetics being metabolized by the liver.
What is the landmark for the IANB injection? - correct answer Coronoid notch
Psychogenic pain - correct answer No organic base for the pain
Max epi dose for cardiac & normal pt - correct answer Cardiac- .04mg
, Normal- .2mg
What is trismus? - correct answer Limited opening of mouth
Management of hematoma - correct answer Cold compression and pressure to bleeding
site
Management of trismus - correct answer Heat therapy, saline rinses, asprin and jaw
exercises
Hematoma can occur if needle penetrates into the pterygoid plexus of veins during
which injection? - correct answer PSA
What needle should be used for infiltration? - correct answer 27g short
Volume of solution of a single cartridge of LA - correct answer 1.8-1.7ml
Antioxidant preventing biodegration of LA by preventing oxidation of vasopressor by
oxygen - correct answer Sodium bisulfite
Actions of vasopressors - correct answer Increase duration of LA, hemostasis, reduce
chance of toxicity
What would cause a dry cornea? - correct answer Anesthetizing the facial nerve. The
facial nerve can be anesthetized if bone is not contacted during the IANB and
anesthetic solution is deposited into the parotid gland. Temporary bell's palsy would not
allow the patients eyelid to blink or close, which would cause the dry eye.
How to calculate amount of epi in a solution - correct answer 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)
Cause of burning upon injection - correct answer acidic ph of solution, injection too fast,
cartridge being wiped with alcohol or sterilizing solution.
Cause of needle breakage - correct answer Bending needle, patient movement
Why would a patient receive an electric shock during delivery of anesthesia? - correct
answer Needle touched the nerve sheath
Ongoing numbness of the anterior 2/3 of tongue is caused by which nerve being
anesthetized? - correct answer Lingual Nerve
What is the benefit of slow deposition rate? - correct answer Less pain, less
complications
