An infectious disease that presents with inflammation within the supporting tissues of the teeth. Progressive attachment and bone loss are accompanied by pocket formation and/or recession of the gingiva. Chronic periodontitis is the most frequently occurring form of periodontitis. It is found most often in adults but can also occur in young patients. Plaque and calculus accompany chronic periodontitis. The sequence of attachment loss is typically slow; however, periods of fast development may occur. The microbial configuration is not consistent or predictable.
Periodontitis in which there is gradual and persistent evidence of periodontal pocket formation, injury to the ligamentous attachments of the teeth, alveolar bone destruction, and eventually, dental loosening.