title: Sealing ability, marginal adaptation and their correlation using three root-end filling materials as apical plugs.
abstract: OBJECTIVE
  This study used dye leakage assay and scanning electron microscopy to evaluate, respectively, the sealing ability and marginal adaptation of three root-end filling materials used as apical plugs, as well as the possible correlation between these properties.
  
  
  METHODS
  Ninety-eight single-rooted human teeth were prepared to simulate an open apex. The teeth were allocated to three experimental groups (n = 30), which received a 5-mm thick apical plug of (1) gray MTA Angelus, (2) CPM and (3) MBPc, and two controls groups (n = 4). After immersion in 0.2% Rhodamine B solution for 48 h, the teeth were sectioned longitudinally and analyzed by Image Tool 3.0 software. The marginal adaptation between apical plugs and the root canal walls were analyzed by SEM.
  
  
  RESULTS
  MBPc had significantly less (p<0.05) apical leakage than the other materials. Regarding marginal adaptation, CPM showed the best numerical results, though without statistical significance from the other materials (p<0.05). There was no correlation between the two properties.
  
  
  CONCLUSIONS
  When used as apical plugs, the tested root-end filling materials had similar marginal adaptation to the dentin walls, but MBPc had the best sealing ability, as demonstrated by the least apical leakage from all tested materials.
authors.affiliation: Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil. faorosco@usp.br
authors.forename: Fernando Accorsi
authors.initials: FA
authors.lastname: Orosco
authors.forename: Clovis Monteiro
authors.initials: CM
authors.lastname: Bramante
authors.forename: Roberto Brandão
authors.initials: RB
authors.lastname: Garcia
authors.forename: Norberti
authors.initials: N
authors.lastname: Bernardineli
authors.forename: Ivaldo Gomes
authors.initials: IG
authors.lastname: de Moraes
mesh_terms: D017607:Aluminum Compounds; D056624:Apexification / Q000379:methods*; D017610:Calcium Compounds; D003763:Dental Leakage / Q000517:prevention & control; D018772:Dental Marginal Adaptation; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D010087:Oxides; D010636:Phenols; D012387:Root Canal Filling Materials; D017640:Silicates
chemical_list: C504750:4-methyl-2,4-bis(4-hydroxyphenyl)pent-1-ene; D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; C540763:Endo-CPM-Sealer; D010087:Oxides; D010636:Phenols; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate