pterygoid venous plexus

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The collection of veins occupying the infratemporal fossa. It surrounds the maxillary artery and receives numerous branches that carry blood from the face and surrounding region to the facial and maxillary veins. It is connected to the cavernous sinus and the pharyngeal venous plexus. It is an important region because of the potential to spread dental infection; it can also be inadvertently penetrated when administering a block injection of the posterior superior alveolar nerve, potentially resulting in a haematoma.

Subjects: Dentistry.

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