Which describes the technique for a multiple-needle nasopalatine nerve block?

• A. Local infiltration between centrals, injection at interdental papilla between max centrals, and injections lateral to incisive papilla directed toward nasopalatine foramen
• B. Injection at the incisive foramen only
• C. Injection along canines
• D. Infiltration at posterior palatal mucosa

Answer: (A)

The nasopalatine nerve block works by placing anesthetic where the nasopalatine nerve enters the incisive foramen to numb the anterior palatal mucosa. Using multiple injections around the incisive canal gives reliable coverage of the nerve’s branches and both sides, which is important because the nerve supplies the palatal tissue from canine to canine and can vary in path.

Injecting between the central incisors at the interdental papilla targets the area directly above the incisive foramen, helping to deposit anesthetic near the nerve as it courses toward the foramen. Adding injections lateral to the incisive papilla and directing them toward the nasopalatine foramen places anesthetic on the nerve as it enters the canal from either side, increasing the chance of a complete block. This combination ensures effective anesthesia of the anterior palatal mucosa, which is more reliable than a single deposit at the incisive foramen alone or injections in other regions such as along the canines or at posterior palatal tissue.