title: Sealing versus partial caries removal in primary molars: a randomized clinical trial.
abstract: BACKGROUND
  The resin-based pit and fissure sealant is considered a successful tool in caries prevention, however there is a growing evidence of its use in controlling already established caries in posterior teeth. The aim of this clinical trial is to verify the efficacy of pit and fissure sealants in arresting dentinal caries lesions compared to partial excavation and restorative treatment in primary molar teeth.
  
  
  METHODS
  Thirty six patients with occlusal cavitated primary molar reaching outer half of dentin were selected. The patients were randomly allocated into two groups: sealant application (experimental group - n = 17) and restoration with composite resin (control group - n = 19). Clinical and radiograph evaluation were performed after 6, 12 and 18 months. The chi-square test was used to verify the distribution of characteristics variables of the sample among the groups. The survival rate of treatments was evaluated using Kaplan-Meier survival and log-rank test. Fisher's Exact and logistic regression tests were calculated in each evaluation period (α = 5%).
  
  
  RESULTS
  The control group showed significantly better clinical survival after 18 months (p = 0.0025). In both groups, no caries progression was registered on the radiographic evaluations.
  
  
  CONCLUSIONS
  Sealing had similar efficacy in the arrestment of caries progression of cavitated occlusal lesions compared to partial excavation of the lesions, even though the frequency of re-treatments was significantly higher in sealed lesions.
  
  
  BACKGROUND
  Registro Brasileiro de Ensaios Clínicos (ReBEC): RBR-9kkv53.
authors.affiliation: Orthodontics and Pediatric Dentistry Department, Dental School, University of São Paulo - USP, Av, Lineu Prestes, São Paulo, SP 2227, Brazil. dhesse@usp.br.
authors.forename: Daniela
authors.initials: D
authors.lastname: Hesse
authors.forename: Clarissa Calil
authors.initials: CC
authors.lastname: Bonifácio
authors.forename: Fausto Medeiros
authors.initials: FM
authors.lastname: Mendes
authors.forename: Mariana Minatel
authors.initials: MM
authors.lastname: Braga
authors.forename: José Carlos Pettorossi
authors.initials: JC
authors.lastname: Imparato
authors.forename: Daniela Prócida
authors.initials: DP
authors.lastname: Raggio
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002648:Child; D002675:Child, Preschool; D003188:Composite Resins / Q000737:chemistry; D004245:DMF Index; D003731:Dental Caries / Q000000981:diagnostic imaging / Q000517:prevention & control*; D003737:Dental Cavity Preparation / Q000379:methods; D003738:Dental Cements / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin / Q000000981:diagnostic imaging / Q000473:pathology; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008963:Molar / Q000000981:diagnostic imaging / Q000473:pathology*; D010895:Pit and Fissure Sealants / Q000627:therapeutic use*; D011140:Polyurethanes / Q000737:chemistry; D016300:Radiography, Bitewing; D014094:Tooth, Deciduous / Q000000981:diagnostic imaging / Q000473:pathology*; D016896:Treatment Outcome
chemical_list: C554641:Adper single bond 2; D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; C444701:Filtek Z250; D010895:Pit and Fissure Sealants; D011140:Polyurethanes; C086661:Fluoroshield; D017438:Bisphenol A-Glycidyl Methacrylate