title: Evaluation of apical sealing of three endodontic sealers.
abstract: OBJECTIVE
  The apical sealing ability of three different endodontic sealers was evaluated in extracted teeth using dye penetration.
  
  
  METHODS
  The root canals of 99 extracted human maxillary central incisors were prepared sequentially 2 mm beyond the apical foramen with a size 55 Nitiflex file. The teeth were divided into three experimental groups and obturated by lateral condensation of cold gutta-percha and one of the following sealers: group 1, zinc oxide and eugenol sealer (Fill Canal); group 2, glass ionomer sealer (Ketac-Endo) and group 3, epoxy resin sealer (AH Plus). The teeth were covered with nail varnish to within 1 mm of the apical foramen and immersed in 2% methylene blue in a reduced pressure environment for 24 h. After this period, the teeth were washed and cut longitudinally for apical leakage analysis. The values were obtained from the maximum depth of leakage as well as the average between the maximum and minimum values observed for each group.
  
  
  RESULTS
  Statistical evaluation of the results showed no significant difference in the leakage between Fill Canal and Ketac-Endo (P > 0.05). Leakage with AH Plus was significantly less (P < 0.01) than with the other sealers.
  
  
  CONCLUSIONS
  All three sealers allowed some leakage to occur. Leakage with AH Plus was significantly different than with Fill Canal or Ketac-Endo.
authors: Department of Endodontics, Barretos School of Dentistry, Barretos.
authors: W A
authors: WA
authors: De Almeida
authors: M R
authors: MR
authors: Leonardo
authors: M
authors: M
authors: Tanomaru Filho
authors: L A
authors: LA
authors: Silva
mesh_terms: D001466:Barium Sulfate / Q000737:chemistry; D001729:Bismuth / Q000737:chemistry; D001881:Borates / Q000737:chemistry; D004396:Coloring Agents; D003722:Dental Alloys; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification; D004338:Drug Combinations; D004853:Epoxy Resins / Q000737:chemistry; D005054:Eugenol / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D008751:Methylene Blue; D009532:Nickel; D012117:Resins, Synthetic / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000295:instrumentation; D013223:Statistics as Topic; D014025:Titanium; D015034:Zinc Oxide / Q000737:chemistry; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
chemical_list: D001881:Borates; D004396:Coloring Agents; D003722:Dental Alloys; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; C074934:Ketac Endo; D012117:Resins, Synthetic; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C534916:epoxy resin-based root canal sealer; C040654:titanium nickelide; D001466:Barium Sulfate; D005054:Eugenol; D009532:Nickel; C038425:Fillcanal; D006171:Gutta-Percha; D014025:Titanium; D015034:Zinc Oxide; D008751:Methylene Blue; D001729:Bismuth