PSA Nerve Block Practice Questions and Answers

**1. Which teeth are primarily anesthetized by the PSA nerve block?** a\) Maxillary central and lateral incisors\ b) Maxillary first premolar and second premolar\ c) Maxillary third, second, and first molars\ d) Mandibular first and second molars **Answer:** c) Maxillary third, second, and first m...

**1. Which teeth are primarily anesthetized by the PSA nerve block?** a\) Maxillary central and lateral incisors\ b) Maxillary first premolar and second premolar\ c) Maxillary third, second, and first molars\ d) Mandibular first and second molars **Answer:** c) Maxillary third, second, and first molars **2. What is the success rate of the PSA nerve block technique?** a\) 50%\ b) 72%\ c) 95%\ d) 100% **Answer:** c) 95% **3. In what percentage of patients does the PSA nerve fail to anesthetize the mesiobuccally root of the maxillary first molar?** a\) 10%\ b) 28%\ c) 50%\ d) 77% **Answer:** b) 28% **4. What is a potential complication of the PSA nerve block?** a\) Nerve paralysis\ b) Hematoma formation\ c) Fracture of the maxilla\ d) Permanent loss of sensation **Answer:** b) Hematoma formation **5. What is the recommended needle type for a PSA nerve block?** a\) 30-gauge long needle\ b) 27-gauge short needle\ c) 25-gauge long needle\ d) 18-gauge hypodermic needle **Answer:** b) 27-gauge short needle **7. What is the primary reason for using a short needle in PSA nerve block?** a\) To increase the anesthetic effect\ b) To decrease the risk of hematoma\ c) To make the procedure faster\ d) To reduce the amount of anesthetic used **Answer:** b) To decrease the risk of hematoma **8. Which alternative injection technique is recommended if the PSA nerve block is contraindicated due to bleeding risk?** a\) Buccal nerve block\ b) Inferior alveolar nerve block\ c) Supraperiosteal or PDL injection\ d) Mental nerve block **Answer:** c) Supraperiosteal or PDL injection **1.The PSA nerve exits the skull through which foramen?** a\) Foramen rotundum b\) Infraorbital foramen c\) Pterygopalatine fossa d\) Foramen ovale **Answer**: c) Pterygopalatine fossa **2.What is the most common complication of a PSA nerve block?** a\) Hematoma b\) Trismus c\) Infection d\) Nerve paralysis **Answer:** a) Hematoma **3.The PSA nerve supplies sensory innervation to all of the following EXCEPT:** a\) Maxillary molars (except the mesiobuccal root of the first molar) b\) Buccal gingiva of maxillary molars c\) Hard palate d\) Maxillary sinus **Answer:** c) Hard palate **4.The nasopalatine nerve supplies which of the following structures?** a\) Pulp of the maxillary central incisors b\) Buccal gingiva of the maxillary anterior teeth c\) Palatal mucosa from canine to canine d\) Soft palate **Answer:** c) Palatal mucosa from canine to canine **5.The greater palatine nerve block anesthetizes which area?** a\) Buccal gingiva of maxillary molars b\) Palatal soft tissues and bone from the premolars to the posterior region c\) Maxillary central incisors d\) Mandibular molars **Answer:** b) Palatal soft tissues and bone from the premolars to the posterior region