Gingivitis classification is useful for diagnosis, prognosis and treatment planning. The classification presented below is from Development of a classification system for periodontal diseases and conditions by GC Armitage, DDS (1999) and is used by the American Academy of Periodontology (AAP). In July, 2015 the AAP announced a focused update that addresses three specific areas of concern with the current classification: attachment level, chronic versus aggressive periodontitis, and localized versus generalized periodontitis. For 2017, the AAP plans a comprehensive update that should include classification for peri-implant diseases, risk assessment for periodontal disease progression and prognostic subtypes or profiles within aggressive versus chronic periodontitis.
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