The prevalence and severity of periodontal disease.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D005260:Female; D006301:Health Services Needs and Demand; D006801:Humans; D008297:Male; D008875:Middle Aged; D009520:New Zealand; D010510:Periodontal Diseases / Q000453:epidemiology* / Q000473:pathology; D010512:Periodontal Index; D012959:Socioeconomic Factors