Dental Hygiene Local Anesthesia Test Questions with Correct Solutions

Where mandibular nerve passes through in the skull - Foramen Ovale Where nasopalatine nerve passes through - Incisive Foramen Maxillary division of Trigeminal Nerve is - Sensory Nerve NOT associated with the mandibular nerve branch - Infraorbital nerve Teeth that PSA innervates - 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 - Nasopalatine What injections are needed to anesthetize the entire palate on one side - Greater Palatine and 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 in and Potassium out When do you aspirate? - Right before anesthetic is to be deposited Which local anesthetic is metabolized by pseudocholinesterase? - Esters Topical anesthetics are least effective on? - Keratinized tissues Which is true of topical anesthetics? - No systemic problems Which has the highest occurrence of allergic reactions - Ester option; Benzocaine. What is the significance of giving an amide anesthetic to a patient with cirrhosis? - Due to amide anesthetics being metabolized by the liver. What is the landmark for the IANB injection? - Coronoid notch Psychogenic pain - No organic base for the pain Max epi dose for cardiac & normal pt - Cardiac- .04mg Normal- .2mg What is trismus? - Limited opening of mouth Management of hematoma - Cold compression and pressure to bleeding site Management of trismus - Heat therapy, saline rinses, asprin and 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? - 27g short Volume of solution of a single cartridge of LA - 1.8-1.7ml Antioxidant preventing biodegration of LA by preventing oxidation of vasopressor by oxygen - Sodium bisulfite Actions of vasopressors - Increase duration of LA, hemostasis, reduce chance of toxicity