Extrinsic stains and dental health in Nigerians.
D000293:Adolescent; D000328:Adult; D002648:Child; D003731:Dental Caries / Q000453:epidemiology; D003773:Dental Plaque / Q000453:epidemiology; D005260:Female; D005891:Gingivitis / Q000453:epidemiology; D006801:Humans; D008297:Male; D009549:Nigeria; D009909:Oral Health; D009910:Oral Hygiene; D012959:Socioeconomic Factors; D014075:Tooth Discoloration / Q000453:epidemiology*