Severity Scale

Anatomic space

1 : Mild risk

Canine, vestibular maxillary and mandibular, palatal

2: Moderate risk

Submandibular, sublingual, submental, pterigomandibular, submasseteric, temporal,

3: Severe risk

Retropharyngeal, pterigopalatal, pretracheal, pterigopharyngeal

4: Extreme risk

Mediastinum, intracranial, prevertebral