Midterm Flashcards
Primary technique for Posterior Maxilla
PSA, MSA infiltration
V2 block is via which foramen?
Greater palatine
Each cartridge contains ____ ml of solution
1.7
Max safe dose of Epinephrine
.2 mg
Max safe dose of epinephrine for cardiac patients
.04 mg
Activation gates
m gates
Inactivation gates
h gates
Time before channel can reopen
refractory period
Na+ channel inactivation is responsible for
repolarization
Na+ channels are concentrated where?
At nodes of Ranvier
Which linkage type causes allergies
esters
Higher Q value means?
The better it gets into a nerve fiber and longer it lasts
Most to least affected for pain:
Dull pain, warmth, cold, sharp pain, touch, pressure, proprioception
What is sodium metabisulfite?
Antioxidant for vasoconstrictors
What is methylparaben
Preservative, for multidose vials only
pH of LA are usually between?
4-6
Most to least lipophilic: mepivacaine, lidocaine, bupivacaine
Bupivacaine, Mepivacaine, Lidocaine
Order in which body takes up unbound drug
Lungs, brain/heart/liver/kidneys, muscles, fat
amide type metabolism
hepatic metabolism
a1 adrenergic receptors
vasoconstrictors- Excitatory
a2 adrenergic receptors
inhibits release of NE-inhibitory
B1 receptor
found in heart and small intestines-cardiac stimulation
B2 receptors
found in bronchi of lungs, produces bronchodilation
Why do we need vasoconstrictors? 3 reasons
Hemostasis, lower toxicity, longer duration
1:50,000 epi in a 1.7 ml cartridge
.034 mg
1:100,000 epi in a 1.7. ml cartridge
.017 mg
1:200,000 epi in a 1.7 ml cartridge
.0085 mg
alpha or beta predominates in epi?
Beta
Higher gauge means
smaller needles
Should we use 30 gauge needles?
no
How many times should you aspirate before injecting?
2x if blood the first time
Type of injection where treatment is done in the same area where the local anesthetic was deposited
Local infiltration
Type of injection where local anesthetic is deposited close to a main nerve trunk
Nerve block
Pulp, Investing structures, labial soft tissues of anterior teeth
ASA
Pulp investing structures, labial soft tissue of premolars and MB root of first molar
MSA
Pulp, investing structures, labial soft tissues of molars, except for MB root of first molar
PSA
Palatal mucoperiosteum of anterior teeth
Nasopalatine nerve
Palatal mucoperiosteum of premolars and molars
Greater palatine nerve
Infiltration injection location
Intersection of LA of tooth and height of MB fold
Should you use infiltration for large areas of the mouth?
NOpe
PSA nerve block technique
Height of MB fold over 2nd molar, upward 45 degree angle, half the length of a long needle (no bone contact)
MSA nerve block technique
Height of MB fold above maxillary 2nd premolar
Infraorbital nerve block blocks which nerves?
ASA, MSA, Infraorbital
Infraorbital nerve block technique
Over 1st premolar
Greater palatine nerve block point of insertion
Anterior to GP forament (usually distal to second molar)
Most painful injection
Nasopalatine
Insertion point for nasopalatine nerve block
lateral to incisive papilla
To numb entire side (msa, asa, psa) of maxilla
Maxillary nerve block, same as PSA but deeper
Amount of LA to be delivered in each site
About- .5 for Infiltration,palatal anything, about 1 for everything else except Maxillary nerve block is a full cartridge
5 nerves of V3
long buccal, lingual, IAN, Mental, incisive
IAN innervates
Mandibular teeth pulp to midline, body of mandible, buccal mucoperiosteum
Long buccal nerve innervates
Buccal mucoperiosteum of mandibular molars
Lingual nerve innervates
Anterior 2/3 of the tongue and floor of mouth, lingual mucoperiosteum
IAN nerve block technique
lateral to the pterygomandibular raphe, hit bone, come in from opposite premolar region
If you get early touch for IAN on ramus which way do you shift?
Towards the canine
If you touch late for the IAN on the ramus where do you shift?
Toward the molar region
Lingual nerve block technique
Same as IAN but 5mm out
Mylohyoid nerve block
Infiltration on lingual surface of the tooth posterior to the tooth in question
Long buccal nerve block technique
Mucous membrane distal and buccal to the most distal molar in the arch, parallel but lateral to occlusal plane, bone contact
Mental nerve block technique
MB between 1st and 2nd premolars
Gow-gates technique
distal to maxillary 2nd molar, lateral side of condylar neck, hit bone
vazirani-Akinosi technique
will relieve muscle spasm/trismus, straight back parallel to maxillary molars, no bone contact