WREB questions with verified solution 2023 /2024 passed

WREBIf an injection is done 2x and still doesn't produce pain control, why is that? - correct answer Lower pH of tissue, edema, hemorrhage or transudation of surrounding areas. Why is anesthesia not as effective when there is an infection? - correct answer pH of tissues is too low to allow anesthetic to penetrate the nerve. What is the largest fiber with the most rapid conducting axons and transmits SHARP dental pain? - correct answer an A Fiber What fibers are not involved in dental Pain? - correct answer B fibers What is the smallest fiber, has no myelin sheath, and causes DULL BURNING pain? - correct answer a C Fiber What can happen with toxic blood levels? - correct answer Anesthesia depresses the CNS and causes pt. To have convulsions. Ester anesthetics are metabolized in the blood stream by - correct answer Pseudo cholinesterase Esters see contraindicated in pt. Who have - correct answer Atypical pseudo-cholinesterase production Amides metabolized by _________ except PRILOCAINE, which is metabolized in the ________. - correct answer Liver; lungs Why are vasoconstrictors added to local anesthesia? - correct answer Decrease absorption, blood flow at injection site, toxicity, prolong effectiveness and working time, and constricts blood vessels What are the most commonly used vasoconstrictors used in dentistry? - correct answer Epi and levinorefrin Epi is good for what? - correct answer Hemostatis What is the recommended topical form of Lidocaine? - correct answer 200mg What is the most common anesthesic used today? - correct answer Lido with epi ( 1:100,000) Why is Mepivicaine (3%) plain used? - correct answer Pt. Who can't have epi or for short procedures What anesthetic do you use if you want pulpal anesthesia for longer appointments or when post operative pain is anticipated? - correct answer Bupivicaine Why is Bupivicaine not recommended to children or handicapped pt? - correct answer Increase postoperative injury (chewing on lips) Why would there be mild burning sensation during administration of anesthesia? - correct answer pH of solution, too warm, contamination Does an artery or vein cause hematoma - correct answer Artery What is treatment for trimus? - correct answer Heat therapy 20 minutes every hour and muscle relaxants or anti inflammatory such as Diazepam 10mg Local anesthesia depresses excitation in nerve endings or inhibiting the conduction of what nerves? - correct answer Peripheral Local anesthesia differs from other drugs in that most other drugs are absorbed in the blood stream but local anesthesia stops their action once absorbed where? - correct answer Systemic circulation