Periodontitis is a chronic multifactorial inflammatory disease associated with dysbiotic plaque biofilms and characterized by progressive destruction of the tooth-supporting apparatus which may result in tooth loss. In the 2017 World Workshop on the Classification of Periodontal and Peri-implant Diseases and Conditions, the lack of available evidence supporting the distinction between aggressive and chronic forms of periodontitis was highlighted. However, it was recognized that a substantial variation in terms of extent and

Background: Rate of progression of periodontitis has been used to inform the design

Within the limitations of the research, the data show that mean annual attachment level change varies considerably both within and between populations. Overall, the evidence does not support or refute the differentiation between forms of periodontal diseases based upon progression of attachment level change.