Dental Hygiene Local Anesthesia Study Boards Questions and Answers Latest Version Already Passed

Dental Hygiene Local Anesthesia Study Boards Questions and Answers Latest Version Already Passed What happens to the pH of tissue during infection, and how does it affect anesthesia? The pH drops, making the anesthetic less effective Which anatomical landmark helps locate the injection site for the PSA nerve block? The maxillary tuberosity What local anesthetic is most likely to cause methemoglobinemia? Prilocaine What is the function of the myelin sheath in nerve conduction? It allows faster transmission of nerve impulses What is the role of the nodes of Ranvier in anesthetic action? They are the gaps where anesthetics block saltatory conduction 2 Why should a hygienist aspirate twice before injecting? To ensure the needle is not in a blood vessel Which injection anesthetizes the entire palatal side of the maxillary arch on one side? Greater palatine and nasopalatine nerve blocks together What is the most likely cause of trismus following a nerve block? Trauma to the muscles during injection What patient symptom might indicate too much epinephrine was administered? Rapid heartbeat or palpitations What is the primary danger of using topical anesthetics for extended periods? Tissue sloughing or systemic absorption Which block numbs the anterior two-thirds of the tongue? Lingual nerve block 3 Why should you avoid injecting into inflamed or infected tissue? Poor pH and increased blood flow reduce anesthetic effectiveness What is a safe action if a patient is allergic to local anesthetics? Refer for allergy testing and use alternative methods What injection technique is used to numb the pulp of multiple maxillary posterior teeth with a single injection? Posterior superior alveolar block What causes the tingling or “pins and needles” feeling after local anesthesia? Normal effect of nerve desensitization What does a slow onset of anesthesia suggest about the anesthetic? It may have a high pKa Which injection is most likely to cause a hematoma? PSA nerve block 4 What causes temporary facial paralysis after an inferior alveolar nerve block? Anesthetic deposited near the facial nerve What is the primary purpose of using a long needle? To reach deeper structures like the mandibular foramen Why are children more sensitive to local anesthetics? They have smaller body mass and lower tolerance What’s the safest way to dispose of used anesthetic needles? In a puncture-resistant sharps container How can you recognize an allergic reaction to local anesthetic? Hives, itching, or difficulty breathing What causes tissue blanching during injection? Vasoconstriction from epinephrine 5 What step helps prevent needle breakage during injection? Do not insert the needle all the way to the hub What is the effect of a higher concentration of epinephrine in anesthetic? Increased duration and depth of anesthesia