Question

During which nerve block is the pterygoid plexus more likely to get punctured?

a. MSA nerve block
b. ASA nerve block
c. PSA nerve block
d. Nasopalatine nerve block

Answer 1

The pterygoid plexus is more likely to be punctured during a PSA (Posterior Superior Alveolar) nerve block.

Step-by-step explanation:

The pterygoid plexus is more likely to get punctured during a PSA nerve block (Posterior Superior Alveolar nerve block). This procedure anesthetizes the maxillary molars excluding the mesiobuccal root of the first molar, which is typically innervated by the MSA (Middle Superior Alveolar) nerve. The pterygoid plexus may be punctured if the needle is inserted too far posteriorly or medially because this venous plexus is located near the PSA nerve.