“…During the 2 decades that this classification was in use, physicians, researchers, epidemiologists, among other specialists in the area expressed the difficulty in differentiating between cases of chronic and aggressive periodontitis, but it was thanks to scientific advances and a more detailed understanding of periodontal disease that led to the proposal of a new classification at the 2017 World Workshop that encompasses health, gingivitis and periodontitis, was published in 2018. 8,16,17 The current classification is based on the use of stages and grades for diagnosis, the staging used in oncology, considers the observable clinical presentation communicating the current severity and extent of the disease and has been adapted to periodontitis, having as goals to classify by stages the severity and complexity and by grades the progress and severity of the disease and four stages and three grades have been determined where diabetes is considered as a risk factor in the progression of periodontitis (Tables 1 and 2). 8,17…”