Periodontal disease and oral cleanliness in tobacco smokers.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003741:Dental Deposits / Q000453:epidemiology; D003753:Dental Health Surveys; D004739:England; D006801:Humans; D008875:Middle Aged; D009909:Oral Health; D010510:Periodontal Diseases / Q000453:epidemiology*; D010512:Periodontal Index; D012907:Smoking / Q000150:complications*