title: Changing periodontal concepts. Part I. Etiology and diagnosis.
mesh_terms: D000293:Adolescent; D000328:Adult; D005884:Gingival Hemorrhage / Q000503:physiopathology; D006801:Humans; D010510:Periodontal Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology*; D010514:Periodontal Pocket / Q000473:pathology; D010518:Periodontitis / Q000175:diagnosis / Q000473:pathology; D011859:Radiography; D014086:Tooth Mobility / Q000503:physiopathology