title: [Determination of the fluorine release of fluoride varnishes by neutron activation method].
abstract: OBJECTIVE
  To determine the fluorine content in enamel before and after besmearing fluoride varnishes by neutron activation method.
  
  
  METHODS
  A pair of mandibular deciduous central incisor teeth were chosen. One was removed, and the other was besmeared with fluoride varnishes and removed 24 hours later. The contents of fluorine were determined and analyzed statistically.
  
  
  RESULTS
  The fluorine content in the enamel of the tooth besmeared with fluoride varnishes was higher than that in the control tooth (P < 0.05).
  
  
  CONCLUSIONS
  The application of the fluoride varnishes can effectively increase the content of fluorine in the sclerous tissues.
authors.affiliation: Department of Pediatric Dentistry, School of Stomatology, Hebei Medical University, Shijiazhuang 050017, China. pingyakun64@sina.com
authors.forename: Ya-kun
authors.initials: YK
authors.lastname: Ping
authors.forename: Hong-ying
authors.initials: HY
authors.lastname: Liu
authors.forename: Dong-mei
authors.initials: DM
authors.lastname: Liu
authors.forename: Lan-ying
authors.initials: LY
authors.lastname: Guo
mesh_terms: D002327:Cariostatic Agents / Q000493:pharmacokinetics*; D002648:Child; D003731:Dental Caries / Q000517:prevention & control; D003743:Dental Enamel / Q000737:chemistry*; D005260:Female; D005459:Fluorides / Q000032:analysis*; D005460:Fluorides, Topical / Q000493:pharmacokinetics*; D006801:Humans; D008297:Male
chemical_list: D002327:Cariostatic Agents; D005460:Fluorides, Topical; D005459:Fluorides