For the ease of understanding, let us divide the classification systems proposed on the basis of dominant paradigms. Periodontitis as a manifestation of systemic disease. This term was used to describe the condition where local deposits caused inflammation of the periodontal membrane. This classification was very complete, detailed and complex. Adult periodontitis category in 1989 classification was designated for patients more than 35 years of age, having a slow rate of disease progression and periodontal destruction consistent with the presence of local factors. In fact the beginning of chronic periodontitis has been suggested to start during childhood. Classification of periodontal diseases. In 2017, the AAP revised the 1999 system to be consistent with current knowledge on pathophysiology. Papers. Their observations showed that the natural history of periodontal disease, in some but not all patients, results in tooth loss. So, it was felt that these acquired deformities and conditions should be added in the classification as a separate category. Adult periodontitis category in 1989 classification was designated for patients more than 35 years of age, having a slow rate of disease progression and periodontal destruction consistent with the presence of local factors. Their research work showed that host response is an important factor in determining the disease progression and its outcome. Most of the patients have neutrophil and monocyte function defects. This was a long time coming as both the American Academy of Periodontology and European Federation of Periodontology (EFP) have been working on this for quite some time. The American Academy of Periodontology’s (AAP) 1999 classification system was based on an infection and host response model. Almost all the classification systems given during this period used terms like atrophic, degenerative, dystrophic etc. Alveolar atrophy or diffuse atrophy was described as a noninflammatory disease in which minimal local factors, i.e. The book is usually delivered within one week anywhere in India and within three weeks anywhere throughout the world. Research indicates that 80% of North American adults have some form of periodontal disease, while evidence also indicates that there is a link between oral and systemic health. The charts below provide an overview. ………..Contents available in the book……….Contents available in the book……….Contents available in the book……….Contents available in the book….. Lesions are primarily around permanent first molars and/or incisors with the usually symmetrical distribution. The simplified classification is as follows. (1999). Page and Schroeder in 1982 32 proposed a new classification system which was based on infection/host response paradigm. Some cases were difficult to place in one category as they possessed some features of other category also. In 1999 an international workshop for classification of periodontal diseases and conditions was held at Oak Brook (Illinois, USA), in which a group of internationally acknowledged experts produced a generally accepted and scientifically founded classification of periodontal diseases 40. Aap - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. In the generalized form acute inflammation is present with the proliferation and clefting of the gingival margin. Most of the patients respond appropriately to the treatment, but a small number of patients are refractory to treatment. This type of periodontitis was described as a condition that occurs during or immediately after the eruption of primary teeth. Factors like extent of disease prior to the therapy, type of therapy provided (nonsurgical or surgical, with or without antibiotics, etc. The fourth condition described was occlusal trauma in which there were alveolar bone resorption and tooth mobility due to increased occlusal physical overload. Open in figure viewer PowerPoint. The updated system now aligns periodontal diagnosis in a manner similar to a medical diagnosis. It is normally referred to as AAP/ADA classification. 1999 Dec;4(1):1-6. Van Der Velden U. These included scurvy, mercurial gingivitis, and potassium iodide gingivitis. Categories of Periodontal Diseases and Conditions This system is based on loss of attachment. This website is a small attempt to create an easy approach to understand periodontology for the students who are facing difficulties during the graduation and the post-graduation courses in our field. 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