An infection originating from the maxillary premolar region can most commonly spread to which anatomical space?

Infections from the maxillary premolars most commonly spread to the buccal space because the buccal roots of maxillary premolars are typically longer and extend above the attachment of the buccinator muscle — so infection exits lateral to the buccinator into the buccal space. The buccal space contains buccal fat pad and communicates with other facial spaces. The canine space is associated with maxillary canine infections.