Which block provides anesthesia to the posterior palate?

• A. Greater palatine block
• B. Nasopalatine block
• C. PSA block
• D. Infraorbital block

Answer: (A)

The posterior palate is supplied by the greater palatine nerve as it travels through the greater palatine foramen to the palatal mucosa and gingiva of the posterior maxillary teeth. A block at the greater palatine foramen delivers anesthesia to these posterior palatal tissues, making it the best choice for numbing the posterior palate. The nasopalatine nerve serves the anterior hard palate near the midline, so a nasopalatine block would numb the front part rather than the posterior area. The PSA block targets the teeth and surrounding structures and does not reliably anesthetize the palatal mucosa, while the infraorbital block affects the anterior maxilla and facial tissues. Thus, the greater palatine block provides anesthesia to the posterior palate.