title: A 5-year evaluation of two glass-ionomer cements used as fissure sealants.
abstract: OBJECTIVE
  To evaluate the retention and caries preventive effect of two glass ionomers used as fissure sealants: one resin modified glass ionomer (A) and one conventional glass-ionomer cement (B).
  
  
  METHODS
  The permanent first molars of 100 children, 6-8 years of age at the start of the study, were sealed. Material A was applied on one side (right side, upper, and lower) and material B was applied on the contralateral side (left side, upper, and lower) of the mouth. The control group was composed of 108 children who did not receive fissure sealant but received oral health education. After 5 years, 64.0% of the children of the experimental group and 73.0% of the children of the control group were available for reexamination.
  
  
  RESULTS
  Material A was completely lost in 74.2% and material B in 89.0% (Wilcoxon matched pairs test, P < 0.05). Total retention rate was 1.6% for materials A and B. After 5 years, caries increment was 21.5% for the experimental group and 34.2% for the control group (chi2-test, P < 0.05).
  
  
  CONCLUSIONS
  Sealing pits and fissures with glass-ionomer cements was effective in preventing caries.
authors.affiliation: Department of Community Dentistry, School of Dentistry, University of Campinas, UNICAMP, Piracicaba, São Paulo, Brazil.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Pardi
authors.forename: Antonio Carlos
authors.initials: AC
authors.lastname: Pereira
authors.forename: Fábio Luiz
authors.initials: FL
authors.lastname: Mialhe
authors.forename: Marcelo de Castro
authors.initials: Mde C
authors.lastname: Meneghim
authors.forename: Gláucia Maria Bovi
authors.initials: GM
authors.lastname: Ambrosano
mesh_terms: D016009:Chi-Square Distribution; D002648:Child; D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use; D004245:DMF Index; D001840:Dental Bonding; D003731:Dental Caries / Q000517:prevention & control; D005260:Female; D005500:Follow-Up Studies; D005899:Glass Ionomer Cements / Q000737:chemistry / Q000627:therapeutic use*; D006267:Health Education, Dental; D006801:Humans; D008297:Male; D016555:Matched-Pair Analysis; D008963:Molar / Q000473:pathology; D010895:Pit and Fissure Sealants / Q000737:chemistry / Q000627:therapeutic use*; D019279:Resin Cements / Q000737:chemistry / Q000627:therapeutic use; D018709:Statistics, Nonparametric
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants; D019279:Resin Cements; C084550:Vitremer; C061499:Ketac-Bond