The high tuberosity approach is essentially a deeper version of which block?

The high tuberosity approach is essentially a deeper version of which block?

• A. Inferior alveolar block
• B. PSA (Posterior Superior Alveolar) block
• C. Infraorbital block
• D. Nasopalatine block

Answer: (B)

The high tuberosity approach is a deeper, more posterior path to the same target as the standard posterior superior alveolar (PSA) block. Both techniques aim to anesthetize the PSA nerve as it supplies the maxillary molars, but the high tuberosity method enters higher up near the maxillary tuberosity and penetrates deeper toward the infratemporal fossa to deposit anesthetic near the PSA nerve trunk before it branches. Because of this deeper trajectory, it’s essentially a more advanced version of the PSA block, rather than being related to the mandibular (inferior alveolar) block, the infraorbital block, or the nasopalatine block.

The high tuberosity approach is a deeper, more posterior path to the same target as the standard posterior superior alveolar (PSA) block. Both techniques aim to anesthetize the PSA nerve as it supplies the maxillary molars, but the high tuberosity method enters higher up near the maxillary tuberosity and penetrates deeper toward the infratemporal fossa to deposit anesthetic near the PSA nerve trunk before it branches. Because of this deeper trajectory, it’s essentially a more advanced version of the PSA block, rather than being related to the mandibular (inferior alveolar) block, the infraorbital block, or the nasopalatine block.