title: Evaluation of apical microleakage of teeth sealed with four different root canal sealers.
abstract: OBJECTIVE
  To compare the apical sealing ability of four root canal sealers.
  
  
  METHODS
  Forty extracted human maxillary canines were instrumented 1 mm short of the anatomical apex and randomly assigned to four groups (n=10), according to the root canal sealer used for obturation: Endofill, AH Plus, EndoREZ and Epiphany. Root canals were obturated with gutta-percha points, except for the Epiphany group, in which resin points (Resilon) were used. The teeth were immersed in India ink for seven days and clarified using methyl salicylate. The extent of apical dye penetration was measured with a measuroscope in all aspects of the canal.
  
  
  RESULTS
  AH Plus (0.02 mm +/- 0.07), Epiphany (0.00 mm +/- 0.00) and EndoREZ (0.32 mm +/- 0.62) did not differ statistically to each other (p>0.01). EndoFill presented the highest dye penetration mean (0.83 mm +/- 0.73) and was statistically different from the other sealers (p<0.01).
  
  
  CONCLUSIONS
  The resin-based root canal sealers presented lesser apical microleakage than the zinc oxide and eugenol based sealer. No statistical differences were observed among resin based sealers.
authors.affiliation: Department of Restorative Dentistry, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Fábio
authors.initials: F
authors.lastname: Dultra
authors.forename: Juliana Machado
authors.initials: JM
authors.lastname: Barroso
authors.forename: Laise Daniela
authors.initials: LD
authors.lastname: Carrasco
authors.forename: Alexandre
authors.initials: A
authors.lastname: Capelli
authors.forename: Danilo M Zanello
authors.initials: DM
authors.lastname: Guerisoli
authors.forename: Jesus Djalma
authors.initials: JD
authors.lastname: Pécora