Classification System for Periodontal Diseases and Conditions
In 1999, the American Academy of Periodontology significantly revised their guidelines for periodontal disease classifications.
You may access the original AAP Classification article here. This will take you to the AAP website, and open this document:
Development of a Classification System for Periodontal Diseases and Conditions; Annals of Periodontology, Volume 4.
The classifications in Figure 1 in this article may be used as a guide in patient work-ups, charting, and dental insurance documentation.