title: Neutron activation analysis of fluoride release after treatment with a fluoride varnish in vitro.
abstract: OBJECTIVE
  To use neutron activation analysis to study a new type of cariostatic material, fluoride varnish, in terms of its anti-caries mechanism and its release in vitro.
  
  
  METHODS
  Twenty enamel specimens were measured for baseline fluoride content using neutron activation analysis. The enamel specimens were then fluoridated with 1.5% sodium fluoride varnish for 24 hours, and their enamel fluoride content was measured again with neutron activation analysis.
  
  
  RESULTS
  The baseline fluoride content in the enamel specimens was 161.7 micrograms/g; after fluoridation, the fluoride content in the enamel specimens increased to 277.8 micrograms/g, or about 1.7 times.
  
  
  CONCLUSIONS
  It is evident that this sodium fluoride varnish can significantly increase enamel fluoride content. The neutron activation analysis is a good method for fluoride measurement in vitro.
authors.affiliation: Department of Preventive Dentistry, School of Stomatology, Shanghai Second Medical University (SSMU), P. R. China.
authors.forename: C
authors.initials: C
authors.lastname: Shu
authors.forename: X
authors.initials: X
authors.lastname: Feng
mesh_terms: D002327:Cariostatic Agents / Q000032:analysis / Q000493:pharmacokinetics*; D003743:Dental Enamel / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D007764:Lacquer; D009501:Neutron Activation Analysis; D012969:Sodium Fluoride / Q000032:analysis / Q000493:pharmacokinetics*
chemical_list: D002327:Cariostatic Agents; D012969:Sodium Fluoride