Which nerve block is most commonly associated with hematoma formation due to its proximity to the pterygoid venous plexus?

Correct answer: D. Posterior superior alveolar (PSA) nerve block

• A. The greater palatine nerve block is given in the palate. Hematoma is less common due to tight palatal mucosa.
• B. The IAN block (Halstead technique) is given near the pterygomandibular space. While hematoma can occur, it is not the MOST common site — the PSA block is more notorious for this complication.
• C. The nasopalatine nerve block in the incisive foramen area rarely causes hematoma — the area has less vascular density.
• D. The Posterior Superior Alveolar (PSA) nerve block is administered in the posterior maxilla near the tuberosity. The needle passes close to the pterygoid venous plexus, making hematoma the MOST COMMON and significant complication of this block. ✓