Periodontitis is a severe, chronic inflammatory disease affecting the supporting structures of the teeth, driven by pathogenic bacteria within subgingival dental plaque that provoke a destructive host immune response. It advances from gingivitis — the reversible inflammation of gingival tissue — to irreversible loss of the periodontal ligament and alveolar bone that anchor each tooth in its socket.
Why Periodontitis Matters
Beyond tooth loss, periodontitis carries significant systemic implications. Research consistently associates the disease with increased risk of cardiovascular disease, poorly controlled diabetes, adverse pregnancy outcomes, and respiratory illness. Periodontal pathogens can translocate into the bloodstream, sustaining low-grade systemic inflammation that amplifies these risks — making periodontal health a concern that extends well beyond the mouth.
Common Signs and Symptoms
Periodontitis often advances silently in its early stages, but the following clinical findings typically emerge as the disease progresses:
- Bleeding on probing — gingival hemorrhage during examination or routine home care
- Periodontal pocketing — pathological separation of the gingival sulcus from the tooth root, measured in millimeters
- Radiographic bone loss — horizontal or vertical alveolar bone resorption visible on periapical or bitewing films
- Tooth mobility or drifting as clinical attachment loss accumulates
- Halitosis and suppuration from chronically infected periodontal pockets
Staging, Grading, and Treatment
The 2017 World Workshop on Periodontal Classification introduced a staging and grading system now used universally. Stages I–IV reflect disease severity based on clinical attachment loss, bone loss, and tooth loss; Grades A–C reflect rate of progression and systemic risk modifiers such as smoking history or uncontrolled diabetes.
Treatment begins with non-surgical scaling and root planing, which mechanically disrupts and removes subgingival biofilm and calculus deposits from root surfaces, including the cementum layer. When residual pocketing persists after initial therapy, surgical approaches — such as periodontal flap surgery or osseous recontouring — are indicated. Because periodontitis is a manageable but not curable condition, long-term supportive periodontal therapy at individualized recall intervals is essential to arrest progression and prevent recurrence.
Routine periodontal probing and radiographic monitoring are the most effective means of catching attachment loss early, when intervention has the greatest chance of preserving the natural dentition.