“…The recently introduced classification of periodontal diseases (Caton et al, ) aims to identify well‐defined clinical entities using clear criteria that are able to link diagnosis with prevention and treatment, thus moving towards precision and individualized dentistry. It defines specific criteria for the following diagnoses: (a) periodontal health (Lang and Bartold, ); (b) gingivitis (Trombelli, Farina, Silva, & Tatakis, ); (c) reduced but healthy periodontium (successfully treated periodontitis); (d) gingival inflammation in a periodontitis patient (treated periodontitis with persistent inflammation) (Chapple et al, ); (e) periodontitis (Papapanou et al, ; Tonetti, Greenwell, & Kornman, ); (f) periodontitis as a manifestation of systemic diseases (Albandar, Susin, & Hughes, ; Jepsen et al, ); and (g) necrotizing periodontal disease (Herrera, Retamal‐Valdes, Alonso, & Feres, ).…”