title: Ability of three root-end filling materials to prevent bacterial leakage.
abstract: This study evaluated the ability of three materials--a resinous root canal sealer (Sealer 26) prepared in a thick consistence, a reinforced zinc oxide-eugenol cement (IRM), and a glass-ionomer cement (Fuji IX)--in preventing bacterial leakage. Retrofilled teeth were mounted in an apparatus and then challenged by human saliva. The number of days required for the bacteria from saliva to penetrate the root-end filling materials was determined. Evaluation was conducted for 60 days. Leakage was observed in all teeth of the Fuji IX group, and in 95% (19 of 20 specimens) of the teeth retrofilled with IRM. Sixty-five percent (13 of 20 teeth) of the teeth retrofilled with Sealer 26 showed leakage. No difference was detected between Fuji IX and IRM (p > 0.05). However Sealer 26 was significantly more effective in preventing bacterial leakage when compared with other materials tested (p < 0.05).
authors.affiliation: Department of Endodontics, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.
authors.forename: J F
authors.initials: JF
authors.lastname: Siqueira
authors.forename: I N
authors.initials: IN
authors.lastname: Rôças
authors.forename: E C
authors.initials: EC
authors.lastname: Abad
authors.forename: A J
authors.initials: AJ
authors.lastname: Castro
authors.forename: S M
authors.initials: SM
authors.lastname: Gahyva
authors.forename: A
authors.initials: A
authors.lastname: Favieri
mesh_terms: D001419:Bacteria / Q000187:drug effects*; D001729:Bismuth / Q000737:chemistry / Q000627:therapeutic use; D002126:Calcium Hydroxide / Q000737:chemistry / Q000627:therapeutic use; D003738:Dental Cements / Q000737:chemistry / Q000627:therapeutic use*; D003763:Dental Leakage / Q000382:microbiology / Q000517:prevention & control*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D005899:Glass Ionomer Cements / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D008768:Methylmethacrylates / Q000737:chemistry / Q000627:therapeutic use; D011859:Radiography; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000379:methods; D012463:Saliva / Q000382:microbiology; D013499:Surface Properties; D013997:Time Factors; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry / Q000627:therapeutic use
chemical_list: D003738:Dental Cements; D005899:Glass Ionomer Cements; D008768:Methylmethacrylates; D012387:Root Canal Filling Materials; C080620:Sealer 26; D015035:Zinc Oxide-Eugenol Cement; C110713:fuji IX; C031667:IRM cement; D002126:Calcium Hydroxide; D001729:Bismuth