To anesthetize teeth 6, 7, 8, 9, and 10, which nerve blocks would you use?

• A. Nasopalatine nerve block and bilateral ASAs
• B. PSA block and GP block
• C. Infraorbital block and GP block
• D. Nasopalatine nerve block alone

Answer: (A)

To anesthetize the maxillary anterior teeth across the midline (teeth 6 through 10), you need coverage of both the pulpal innervation and the palatal soft-tissue innervation for that region. The anterior superior alveolar (ASA) nerves supply the pulps of the maxillary canines and incisors on their respective sides (the portion of the maxilla from canines to central incisors). Administering blocks bilaterally targets these teeth on both sides. The nasopalatine nerve block then takes care of the palatal side, anesthetizing the palatal mucosa and periosteum of the anterior maxilla from canine to canine. Using both together gives complete anesthesia of the teeth and the surrounding palatal tissues from 6 to 10.

Other options don’t provide complete coverage for all those teeth. A PSA block targets posterior teeth (molars and premolars) and isn’t appropriate for anterior teeth. A GP block anesthetizes the posterior hard palate on one side and doesn’t reach the anterior teeth. An infraorbital block can anesthetize the anterior teeth on one side but wouldn’t reliably cover the opposite side unless performed bilaterally, and it still wouldn’t ensure palatal anesthesia in the anterior region. A nasopalatine block alone covers only the palatal tissue, not the buccal/pulpal aspect of the teeth.