Overview
A dental abscess is an acute collection of pus originating from a dental source — most commonly the tooth apex (periapical/dentoalveolar abscess) or the periodontium (periodontal abscess). It represents the final escalation of dental infection when host defenses are overwhelmed and bacterial load exceeds the capacity for inflammatory containment.
While most dental abscesses are self-limiting infections managed with drainage and antibiotics in ambulatory settings, a subset progresses into deep fascial space infections of the head and neck — a potentially fatal complication. Mortality from spreading odontogenic infections, while rare (<1%) with modern treatment, remains significant, with Ludwig's angina carrying up to 5–10% mortality even with aggressive management.
The anatomical pathway of abscess spread is determined by the relationship of the root apex to adjacent muscle attachments and fascial spaces — a fundamental concept in predicting and managing dental infection spread.