title: A comparative study of the apical leakage of four root canal sealers and laterally condensed gutta-percha.
abstract: Previous studies have shown that lateral condensation of gutta-percha and sealer can provide an adequate apical seal. The purpose of this study was to compare the level of apical dye penetration when different sealers were used. One-hundred twenty-five teeth with single root canals were biomechanically prepared using the step-back technique and irrigation with EDTAC and 1% NaOCl solutions. The teeth were divided into five groups of 25 teeth each. The control group root canals were filled with laterally condensed gutta-percha and no sealer and the other four groups were filled with laterally condensed gutta-percha and either Apexit, Sealapex, Tubli-Seal, or AH26 sealer. After storage in 100% humidity at 37 degrees C for 48 h, the root surfaces were coated with nail varnish (except at the apex) and placed in 2% methylene blue dye solution and centrifuged at 3 x g for 3 min. The roots were sectioned transversely at 1-mm intervals to determine the following mean levels of dye penetrations: Apexit, 1.67 mm; Sealapex, 2.28 mm; Tubli-Seal, 1.95 mm; AH26, 0.82 mm; and gutta-percha alone, 8.37 mm. This study demonstrated that a root canal sealer should be used in conjunction with laterally condensed gutta-percha and that AH26 sealer provides a significantly better apical seal than the other sealers.
authors.affiliation: University of Western Australia, Perth.
authors.forename: S
authors.initials: S
authors.lastname: Limkangwalmongkol
authors.forename: P
authors.initials: P
authors.lastname: Burtscher
authors.forename: P V
authors.initials: PV
authors.lastname: Abbott
authors.forename: A B
authors.initials: AB
authors.lastname: Sandler
authors.forename: B M
authors.initials: BM
authors.lastname: Bishop
mesh_terms: D001729:Bismuth; D002126:Calcium Hydroxide; D004396:Coloring Agents; D003763:Dental Leakage; D004338:Drug Combinations; D004853:Epoxy Resins; D006801:Humans; D008422:Materials Testing; D008709:Methenamine; D012387:Root Canal Filling Materials; D012459:Salicylates; D012834:Silver; D014025:Titanium; D015035:Zinc Oxide-Eugenol Cement
chemical_list: C074418:Apexit; D004396:Coloring Agents; D004338:Drug Combinations; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012459:Salicylates; D015035:Zinc Oxide-Eugenol Cement; C055601:Sealapex; D012834:Silver; C028044:epoxy resin AH-26; C048769:tubliseal; D014025:Titanium; D008709:Methenamine; D002126:Calcium Hydroxide; D001729:Bismuth