Periodontitis Staging & Grading

Tonetti MS, Greenwell H, Kornman KS. Staging and grading of periodontitis: Framework and proposal of a new classification and case definition. Introduced the Stage I–IV / Grade A–C system: stage from interdental clinical attachment loss, radiographic bone loss, tooth loss and case complexity; grade from the rate of progression, modified by smoking and diabetes.

Caton JG, Armitage G, Berglundh T, et al. A new classification scheme for periodontal and peri-implant diseases and conditions — introduction and key changes from the 1999 classification (2017 World Workshop consensus). Extent is recorded as localized (< 30% of teeth), generalized (≥ 30%), or molar-incisor pattern.