The relationship between Russell's periodontal index and the proportions by age of a sample population with gingivitis and periodontitis.
D000293:Adolescent; D000328:Adult; D000375:Aging; D001315:Australia; D002648:Child; D002675:Child, Preschool; D005260:Female; D005881:Gingiva / Q000033:anatomy & histology; D005891:Gingivitis / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D010510:Periodontal Diseases / Q000175:diagnosis*; D010512:Periodontal Index; D010518:Periodontitis / Q000453:epidemiology*; D012494:Sampling Studies