title: Diagnosis of periodontitis.
authors.forename: U
authors.initials: U
authors.lastname: Van der Velden
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D006801:Humans; D010518:Periodontitis / Q000145:classification* / Q000473:pathology; D012720:Severity of Illness Index; D009626:Terminology as Topic