Which nerve block would numb the posterior palatal tissues?

• A. Greater Palatine
• B. Nasopalatine
• C. Infraorbital
• D. Inferior Alveolar

Answer: (A)

Numbing the posterior palatal tissues relies on targeting the nerve that supplies sensation to that region. The greater palatine nerve carries sensory innervation to the posterior hard palate and the overlying palatal mucosa and gingiva. When a local anesthetic is deposited near the greater palatine foramen, this nerve is blocked and the posterior palatal tissues go numb, which is exactly what you need for procedures in that area.

The other blocks don’t fit this region. The nasopalatine nerve covers the anterior portion of the hard palate (from canine to canine), so it wouldn’t numb the posterior palate. The infraorbital block affects the maxillary anterior teeth and related facial tissues but not the posterior palatal tissues. The inferior alveolar block targets the mandible and its structures, not the maxillary palate.