[Current classification of periodontal diseases]

Since the last 15 years, tremendous progress have been made on epidemiology, microbiology, natural history, immunology, and periodontal tissue response to different treatment modalities. Thus, we are able to suggest today a relatively new classification of the different periodontal diseases far from the one based on the concept of "the periodontal disease". This article aims to help clinicians in understanding the classification of such diseases allowing better treatment and eventually better results.