1. Global burden of severe periodontitis in 1990-2010: a systematic review and meta-regression;Kassebaum;J. Dent. Res.,2014
2. The economics of periodontal diseases;Brown;Periodontol,2002
3. Periodontal diseases;Kinane;Nat. Rev. Dis. Primers.,2017
4. A new classification scheme for periodontal and peri-implant diseases and conditions - introduction and key changes from the 1999 classification;Caton;J. Periodontol.,2018
5. Periodontitis: consensus report of workgroup 2 of the 2017 world workshop on the classification of periodontal and peri-implant diseases and conditions;Papapanou;J. Periodontol.,2018