Periodontitis: Consensus report of workgroup 2 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions: Consensus report of workgroup 2 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions

Research output: Contribution to journalArticlepeer-review


  • Panos N Papapanou
  • Mariano Sanz
  • Nurcan Buduneli
  • Magda Feres
  • Daniel H Fine
  • Thomas F Flemmig
  • Raul Garcia
  • William V Giannobile
  • Filippo Graziani
  • Henry Greenwell
  • David Herrera
  • Richard T Kao
  • Moritz Kebschull
  • Denis F Kinane
  • Keith L Kirkwood
  • Thomas Kocher
  • Kenneth S Kornman
  • Purnima S Kumar
  • Bruno G Loos
  • Eli Machtei
  • Huanxin Meng
  • Andrea Mombelli
  • Ian Needleman
  • Steven Offenbacher
  • Gregory J Seymour
  • Ricardo Teles
  • Maurizio S Tonetti

Colleges, School and Institutes

External organisations

  • Columbia University
  • Facultad de Odontologia; Universidad Complutense Madrid; Madrid Spain
  • Ege University, Izmir, Turkey.
  • National Institute of Health Research (NIHR) Birmingham, Biomedical Research Centre (BRC), University of Birmingham, Birmingham, United Kingdom; Liver Unit, University Hospitals Birmingham Queen Elizabeth, Birmingham, United Kingdom.
  • Universidade Guarulhos, Guarulhos, Brazil.
  • Rutgers University, Newark, NJ, USA.
  • Department of Mechanical Engineering, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong SAR, China.
  • School of Law, Boston University, Boston, MA, USA; CARB-X, Boston, MA, USA.
  • University of Michigan, Ann Arbor, Michigan 48109, USA
  • Rheumatology Unit, University of Pisa, Pisa, Italy.
  • University of Louisville, Louisville, KY, USA.
  • Private practice, Cupertino, CA, USA.
  • Institute of Human Genetics, University Hospital Bonn, Bonn, Germany.
  • Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
  • Department of Philosophy, University at Buffalo, Buffalo, NY 14260, USA.
  • Unit of Periodontology; University Medicine, Ernst-Moritz-Arndt University Greifswald; Greifswald Germany
  • Ohio State University
  • Vrije Universiteit Amsterdam
  • Rambam Health Care Campus & Israel Institute of Technology, Haifa, Israel.
  • Peking University
  • Geneva Observatory, University of Geneva, Maillettes 51, 1290 Sauverny, Switzerland
  • University College London
  • Systems Genetics Core Facility, Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
  • 11. Mater Research Institute – The University of Queensland, Brisbane, Australia;


A new periodontitis classification scheme has been adopted, in which forms of the disease previously recognized as "chronic" or "aggressive" are now grouped under a single category ("periodontitis") and are further characterized based on a multi-dimensional staging and grading system. Staging is largely dependent upon the severity of disease at presentation as well as on the complexity of disease management, while grading provides supplemental information about biological features of the disease including a history-based analysis of the rate of periodontitis progression; assessment of the risk for further progression; analysis of possible poor outcomes of treatment; and assessment of the risk that the disease or its treatment may negatively affect the general health of the patient. Necrotizing periodontal diseases, whose characteristic clinical phenotype includes typical features (papilla necrosis, bleeding, and pain) and are associated with host immune response impairments, remain a distinct periodontitis category. Endodontic-periodontal lesions, defined by a pathological communication between the pulpal and periodontal tissues at a given tooth, occur in either an acute or a chronic form, and are classified according to signs and symptoms that have direct impact on their prognosis and treatment. Periodontal abscesses are defined as acute lesions characterized by localized accumulation of pus within the gingival wall of the periodontal pocket/sulcus, rapid tissue destruction and are associated with risk for systemic dissemination.


Original languageEnglish
Pages (from-to)S173-S182
JournalJournal of Periodontology
Issue numberS 1
Publication statusPublished - 21 Jun 2018