Under the current American Academy of Periodontology (AAP)Classification of Periodontal Diseases and Conditions,the severity of disease is determined by:

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The severity of periodontal disease is determined by clinical attachment loss (CAL), which is a measurement of the amount of attachment loss that has occurred between the tooth and the surrounding soft tissue. The AAP classification system recognizes four stages of periodontitis based on the severity of CAL. Recession, pocket depth, bleeding on probing, and inadequate attached gingiva are factors that may contribute to the diagnosis and treatment planning, but they are not used to determine the severity of disease.

Under the Current American Academy of Periodontology (AAP)Classification of Periodontal