title: Retention of two fluoride pit-and-fissure sealants in comparison to a conventional sealant.
abstract: OBJECTIVE
  The aim of this investigation was to study the retention rates in children of two fluoride fissure sealants, an experimental fluoride-glass formulation and a commercial one, in comparison to a conventional sealant, at 3, 6 and 12 months.
  
  
  METHODS
  The study was performed in a randomized double-blind fashion.
  
  
  METHODS
  The investigation was carried out in the Children's Clinic at Leeds Dental Institute.
  
  
  METHODS
  A total of 74 first and 29 second permanent molars in 25 children aged 6-16 were assigned randomly to one of the three sealant-groups using a table of random numbers. During sealant application occlusal pits and fissures were cleaned with a three-in-one syringe and a blunt probe, etched for 20 seconds, washed, dried and light-cured for 30 seconds. Retention of the sealants was assessed as either completely retained, partially retained or missing at 3, 6 and 12 months.
  
  
  RESULTS
  The results showed that complete retention for fluoride-glass sealant, Delton Plus and Delton was: at 3 months 69.69%, 81.25% and 80.64% respectively, at 6 months 64.51%, 74.19% and 76.66% respectively, and at 12 months 61.29%, 67.74% and 70% respectively.
  
  
  CONCLUSIONS
  No significant difference (P > 0.05) was found among the three materials in retention rates at each follow-up period.
authors.affiliation: Department of Child Dental Health, Leeds Dental Institute, UK.
authors.forename: T L
authors.initials: TL
authors.lastname: Morphis
authors.forename: K J
authors.initials: KJ
authors.lastname: Toumba
mesh_terms: D000293:Adolescent; D017438:Bisphenol A-Glycidyl Methacrylate / Q000627:therapeutic use; D002327:Cariostatic Agents / Q000627:therapeutic use*; D002648:Child; D001840:Dental Bonding; D003750:Dental Fissures / Q000517:prevention & control*; D003799:Dental Stress Analysis; D005460:Fluorides, Topical / Q000627:therapeutic use*; D005500:Follow-Up Studies; D006801:Humans; D008963:Molar; D010895:Pit and Fissure Sealants / Q000737:chemistry / Q000627:therapeutic use*; D011140:Polyurethanes / Q000627:therapeutic use; D016896:Treatment Outcome
chemical_list: D002327:Cariostatic Agents; C487975:Delton Plus; D005460:Fluorides, Topical; D010895:Pit and Fissure Sealants; D011140:Polyurethanes; C086661:Fluoroshield; D017438:Bisphenol A-Glycidyl Methacrylate