Periodontal Classification
The 2017 World Workshop system for categorising periodontal and peri-implant diseases and conditions, replacing the earlier 1999 AAP classification.
Full Definition
The 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions produced a revised classification system jointly endorsed by the American Academy of Periodontology (AAP) and the European Federation of Periodontology (EFP). This system introduced staging (I–IV, reflecting severity and complexity) and grading (A–C, reflecting rate of progression and risk factors) for periodontitis, and established distinct categories for peri-implant health, peri-implant mucositis, and peri-implantitis. Dental hygienists use this classification to document and communicate periodontal diagnoses. Editors must ensure that staging and grading designations use Roman numerals for stages and capital letters for grades, and that the system is not conflated with the superseded 1999 AAP classification.
Usage
Usage note: Confirm which classification system is being referenced; 'periodontal classification' without a date may be ambiguous. Stages use Roman numerals (I–IV); grades use letters (A–C).
In Context
- "Using the 2017 periodontal classification, the patient was diagnosed with Stage III, Grade B generalised periodontitis." — Periodontal diagnosis record
- "Several figures in the submitted article used the 1999 AAP classification categories; these must be updated to reflect the current 2017 World Workshop periodontal classification." — Peer-review editorial comment