The greater palatine injection is primarily used to numb which area?

The greater palatine injection is primarily used to numb which area?

• A. Palatal tissues posterior to the canine
• B. Buccal mucosa around the premolars
• C. Inferior alveolar nerve distribution
• D. Lips and perioral skin

Answer: (A)

The key idea is that the greater palatine nerve supplies sensation to the palatal tissues behind the canine. When the anesthetic is deposited near the greater palatine foramen, it blocks that nerve and numbs the palatal mucosa and gingiva in the posterior hard palate. This area is behind the canine and toward the molars, not the buccal mucosa around the premolars, not the inferior alveolar nerve distribution, and not the lips or perioral skin, which are served by other nerves. So the area numbed by this injection is the palatal tissues posterior to the canine.

The key idea is that the greater palatine nerve supplies sensation to the palatal tissues behind the canine. When the anesthetic is deposited near the greater palatine foramen, it blocks that nerve and numbs the palatal mucosa and gingiva in the posterior hard palate. This area is behind the canine and toward the molars, not the buccal mucosa around the premolars, not the inferior alveolar nerve distribution, and not the lips or perioral skin, which are served by other nerves. So the area numbed by this injection is the palatal tissues posterior to the canine.