Which one of the following injections is the best alternative for an unsuccessful infiltration of a maxillary first molar?
A) PSA
B) MSA
C) IO
D) AMSA

Question

Quizplus · Accepted Answer

The Posterior Superior Alveolar (PSA) nerve block is the best alternative for an unsuccessful infiltration of a maxillary first molar because it specifically targets the area where the maxillary first molar is located, providing anesthesia to the pulp of the maxillary molars (except for the mesiobuccal root of the first molar in some cases) and the buccal periodontium.

Which One of the Following Injections Is the Best Alternative