title: [Evaluation of the clinical effect of fluoride varnish in preventing caries of primary teeth].
abstract: OBJECTIVE
  To evaluate the clinical effect of fluoride varnish in preventing caries of primary teeth, and to compare the caries prevention effects of fluoride varnish with two different concentrations.
  
  
  METHODS
  150 children whose ages were three year-old were randomly chosen from one of nurseries of Chongqing, and were randomly divided into four groups with 37 children in 0.5% fluoride varnish group, 38 children in 0.1% fluoride varnish group, 39 children in 0.5% sodium fluoride group and 36 children in blank group. The groups included 71 'girls and 79 boys. Protective measure was applied every half an year and the research has lasted for two years. The research was designed by double-blinded methods, and was carried out with the dental caries standard suggested by World Health Organization. All the data were collected and the clinical effects of four groups were compared.
  
  
  RESULTS
  The average caries index and caries surface index of 0.1% fluoride varnish group and those of control groups were significantly higher than that of 0.5% fluoride varnish group. There were no significant difference between the average caries index and caries surface index of 0.1% fluoride varnish group and those of control groups.
  
  
  CONCLUSIONS
  0.5% fluoride varnish was effective in preventing caries of primary teeth.
authors.affiliation: Department of Preventive Dentistry, College of Stomatology, Chongqing Medical University, Chongqing 400015, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yang
authors.forename: Ju-Hong
authors.initials: JH
authors.lastname: Lin
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Jiang
mesh_terms: D002327:Cariostatic Agents; D002648:Child; D003731:Dental Caries; D005260:Female; D005459:Fluorides; D005460:Fluorides, Topical; D006801:Humans; D008297:Male; D010150:Paint; D010710:Phosphates; D012969:Sodium Fluoride; D014094:Tooth, Deciduous
chemical_list: D002327:Cariostatic Agents; D005460:Fluorides, Topical; D010710:Phosphates; C012980:fluorophosphate; D012969:Sodium Fluoride; D005459:Fluorides