title: Effect of fluoride gels on occlusal fissures in primary molars: an in vitro study.
abstract: OBJECTIVE
  To assess the effect of the application of fluoride gels on the acid resistance of occlusal enamel in primary molars.
  
  
  METHODS
  Forty-five primary second molars were randomly assigned to three groups: a) control (pH-cycling); b) 2% NaF gel/pH-cycling; and c) 1.23% APF gel/pH-cycling.
  
  
  METHODS
  Specimens were longitudinally sectioned in the buccal-lingual direction and used for cross-sectional microhardness testing. Knoop hardness values were converted into vol.% mineral and mineral loss (ΔZ) was then calculated.
  
  
  METHODS
  The response variables were vol.% mineral and ΔZ. Data were tested using parametric tests at a significance level of 5%.
  
  
  RESULTS
  No statistically significant differences were found between groups regarding vol.% mineral or ΔZ.
  
  
  CONCLUSIONS
  A single application of a high concentration fluoride compound does not promote greater resistance to demineralisation in enamel pits and fissures, regardless of the product used.
authors: Department of Health Sciences, Universidale Federal dos Vales do Jequitinhonha e Mucuri, Brazil. meirecofe@ig.com.br
authors: M C
authors: MC
authors: Ferreira
authors: M C M
authors: MC
authors: Calvo
authors: R S
authors: RS
authors: Vieira
mesh_terms: D000149:Acidulated Phosphate Fluoride / Q000008:administration & dosage*; D000704:Analysis of Variance; D003750:Dental Fissures / Q000517:prevention & control*; D005782:Gels; D006244:Hardness; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008963:Molar; D012969:Sodium Fluoride / Q000008:administration & dosage*; D014094:Tooth, Deciduous
chemical_list: D005782:Gels; D000149:Acidulated Phosphate Fluoride; D012969:Sodium Fluoride