title: Polymicrobial leakage of four root canal sealers at two different thicknesses.
abstract: The present study investigated the sealing ability of four root canal sealers at two different thicknesses. There were 82 maxillary incisors roots prepared with Gates Glidden drills up to size 6 and divided into four groups: Pulp Canal Sealer, EndoREZ, Sealapex, and AH Plus. Each group was divided in two subgroups and gutta-percha cylinders 1.5 or 1 mm wide were used, respectively. The roots were mounted in a bacterial leakage model and the system was checked daily during the following 12 wk. Data were analyzed by Log-Rank test and Student t-test. In the thin layer samples, the sealers demonstrated similar results while, in the thick layer samples, AH Plus revealed the best performance. Generally, greater sealer thickness influenced negatively the sealing ability of the root canal filling, except in AH Plus samples.
authors.affiliation: Department of Endodontics, Rio de Janeiro State University, Rio de Janeiro, Brazil. endogus@gmail.com
authors.forename: Gustavo
authors.initials: G
authors.lastname: De-Deus
authors.forename: Tauby
authors.initials: T
authors.lastname: Coutinho-Filho
authors.forename: Claudia
authors.initials: C
authors.lastname: Reis
authors.forename: Cristiana
authors.initials: C
authors.lastname: Murad
authors.forename: Sidnei
authors.initials: S
authors.lastname: Paciornik
mesh_terms: D002126:Calcium Hydroxide / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003763:Dental Leakage / Q000382:microbiology*; D003786:Dental Pulp Cavity / Q000382:microbiology; D004853:Epoxy Resins / Q000737:chemistry; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D018915:Root Canal Preparation / Q000295:instrumentation; D012459:Salicylates / Q000737:chemistry; D012463:Saliva / Q000382:microbiology; D013499:Surface Properties; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
chemical_list: D003188:Composite Resins; C481259:EndoRez; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012459:Salicylates; D015035:Zinc Oxide-Eugenol Cement; C534916:epoxy resin-based root canal sealer; C055601:Sealapex; C076543:Kerr Pulp Canal Sealer; D006171:Gutta-Percha; D002126:Calcium Hydroxide