Overview
A periodontal abscess is a localised accumulation of pus within the periodontal pocket or adjacent periodontal tissues. It represents an acute exacerbation of chronic periodontitis and accounts for approximately 8–14% of all emergency dental visits.
Periodontal abscesses must be differentiated from periapical (endodontic) abscesses, as treatment differs fundamentally. Pulp vitality testing is the essential differentiating investigation.
Untreated, a periodontal abscess can spread to fascial spaces causing Ludwig's angina — a life-threatening infection with airway compromise risk.