Local anesthesia quiz questions with 100% correct answers
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Module
Local Anesthesia
Institution
Local Anesthesia
facial paralysis
if local solution is inadvertently deposited in the parotid gland, what complication will most likely occur?
inferior alveolar nerve
which nerve travels through the mandibular canal, exits the mandibular foramen, and innervates the mandibular teeth?
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Local Anesthesia: Board
Exam Review fully solved &
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Chapter 4: Pharmacology of Vasoconstrictors -
answer
What are the problems associated with the
vasodilatory properties of local anesthetics? -
answer - An increased rate of absorption of LA's in
the CVS
- A decrease in duration of the anesthetic's action
- higher blood levels of LA's (increase risk in
toxicity)
- increase in bleeding
What are the benefits of adding vasoconstrictors to
LA solutions? - answer They counteract the
vasodilating properties of LA's:
- decreased blood flow
- slow absorption of LA's
- lower blood levels
- more LA enters the nerve
,- decreased bleeding at sight
What are the two vasoconstrictors added to local
anesthetics? - answer 1. epinephrine
2. levonordefrin
What is the use of vasoconstrictors in dentistry? -
answer Epinephrine is absorbed from the site of
injection and it increases cardiac output and stroke
volume
Epinephrine mechanism of action? - answer
Activates adrenergic receptors
Sodium bisulfite preservative? - answer Advantage:
Increases shelf life
Disadvantages: Further acidify the pH of the
anesthetic solution, allergic reactions to sodium
bisulfites
, Epinephrine actions on specific systems and
tissues - answer - Increases cardiac output and
heart rate
- Increases irritability of pacemaker cells:
increased incidence of dysrhythmias & tachycardia
- Respiratory system: potent dilator
- Increases oxygen consumption in all tissues
Epinephrine termination of action - answer
Terminated by the reuptake of adrenergic nerves
Levonordefrin actions on specific systems and
tissues - answer Only 1/6 as strong as epi, so it is
used in a stronger concentration
Levonordefrin dilution - answer Used with
Mepivacaine HCL 2% at 1:20,000
Levonordefrin termination of action - answer
Reuptake of adrenergic nerves
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