title: Efficacy of two contemporary single-cone filling techniques in preventing bacterial leakage.
abstract: This in vitro study evaluated the sealing efficacy of three root-filling systems/techniques in preventing bacterial leakage. Instrumented single-rooted root segments were filled with (1) warm vertical compaction with gutta-percha/AH Plus; (2) single-cone technique with ActiV GP; and (3) single-cone technique with Gutta-Flow. A dual-chamber leakage model using S. mutans as a microbial marker was used for leakage evaluation. Bacterial penetration was monitored over a 100-day period. Leakage was recorded when turbidity was observed in the lower chamber. Gutta-percha warm vertical compaction exhibited the best seal with bacterial leakage observed in only 16.7% of the specimens between 59 and 100 days. All ActiV GP specimens leaked between 7 and 100 days; 50% of the Gutta-Flow specimens leaked between 22 and 100 days. The two contemporary single-cone techniques did not insure a durable apical seal against bacterial leakage. A warm vertical compaction technique using thermoplasticized gutta-percha and AH Plus sealer appears to be more effective in minimizing bacterial leakage.
authors.affiliation: Department of Restorative Dentistry and Dental Materials, University of Siena, Siena, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Monticelli
authors.forename: Fernanda T
authors.initials: FT
authors.lastname: Sadek
authors.forename: George S
authors.initials: GS
authors.lastname: Schuster
authors.forename: Keith R
authors.initials: KR
authors.lastname: Volkmann
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Looney
authors.forename: Marco
authors.initials: M
authors.lastname: Ferrari
authors.forename: Manuel
authors.initials: M
authors.lastname: Toledano
authors.forename: David H
authors.initials: DH
authors.lastname: Pashley
authors.forename: Franklin R
authors.initials: FR
authors.lastname: Tay
mesh_terms: D003763:Dental Leakage / Q000517:prevention & control*; D004129:Dimethylpolysiloxanes; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; D006171:Gutta-Percha; D006801:Humans; D053208:Kaplan-Meier Estimate; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D013295:Streptococcus mutans
chemical_list: D004129:Dimethylpolysiloxanes; D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; C515718:GuttaFlow; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; D006171:Gutta-Percha