WREB question n answers graded A+ 2023/2024

WREBLocal anesthetic mainly A. Decrease the rate of depolarization B. Lower the threshold potential C. Accelerate the rate of repolarization D. All the above - correct answer A. Decrease the rate of depolarization Which injection is needed to anesthetize the palatal tissue around the left maxillary molar A. Nasopalatine nerve block B. Greater palatine nerve block C. Posterior superior alveolar nerve block D. Buccal nerve block - correct answer B. greater palatine (GP) Which of the following aesthetics is contraindicated for patients with COPD? A. Lidocaine B. Bupivacaine •C. Prilocaine V D. Mepivacaine - correct answer C. Prilocaine During aspiration, you see blood rapidly coming through the dental cartridge. What should the next step be in this situation? A. Turn the syringe 45 degrees and aspirate again B. Pull back the needle and re-insert it C. Remove the needle and replace the cartridge D. No action is needed - correct answer C. Remove the needle and replace the cartridge Which type of injection most efficiently provides Hemostasis? A. Nerve block B. Filed block C. Infiltration D. All the above - correct answer C. Infiltration During aspiration, you see blood rapidly coming through the dental cartridge. What should the next step be in this situation? a. turn the syringe 45 degrees and aspirate again b. pull back the needle and re-insert it c. Remove the needle and replace the cartridge d. No action is needed - correct answer C. Remove the needle and replace the cartridge A hematoma quickly appeared after a posterior superior alveolar nerve block. Which of the following may have caused the hematoma? A. The solution was deposited into a blood vessel B. The needle penetrated the parotid gland C. The needle penetrated the pterygoid plexus of veins D. The needle irritated the muscles of the cheek - correct answer c. needle penetrated the pterygoid plexus of veins At the end of the dental appointment, you noticed that one side of the patients face is "drooping". What could have caused this change? A. Local anesthetic was deposited into the parotid gland