title: Disintegration of endodontic cements in water.
abstract: The disintegration of three endodontic cements in water was determined quantitatively and qualitatively. The materials studied were Ketac-Endo (KE), Tubli Seal (TS), and AH26 (AH). Specimens were immersed in water for 48 h (GI), 7 (GII) and 45 days (GIII). The solid residue was then determined. For the qualitative analysis three groups of tubes were filled with the materials and stored in water for the same periods. The exposed surface was photographed. Results expressed as percentage of original mass in the quantitative analysis for loss of mass due to dissolution were: GI = KE 2.39 (0.70); TS 3.56 (0.37); AH 4.94 (2.83); GII = KE 2.84 (0.30); TS 2.50 (0.50); AH 0.66 (0.26); GIII = KE 1.60 (0.84); TS 1.03 (0.42); AH 1.22 (0.54). Tukey's least significant difference (0.05) was 2.94. In the qualitative experiment KE disintegration was far more evident than that suffered by other materials. The quantitative results had no correlation with the qualitative observations probably due to the difference in the moment when the materials were immersed.
authors.affiliation: Department of Dental Materials, School of Dentistry, University of Buenos Aires, Argentina.
authors.forename: A E
authors.initials: AE
authors.lastname: Kaplan
authors.forename: F
authors.initials: F
authors.lastname: Goldberg
authors.forename: L P
authors.initials: LP
authors.lastname: Artaza
authors.forename: A
authors.initials: A
authors.lastname: de Silvio
authors.forename: R L
authors.initials: RL
authors.lastname: Macchi
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004338:Drug Combinations; D004355:Drug Stability; D004853:Epoxy Resins; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D008709:Methenamine / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D012995:Solubility; D018709:Statistics, Nonparametric; D014025:Titanium / Q000737:chemistry*; D014867:Water; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D004338:Drug Combinations; D004853:Epoxy Resins; D005899:Glass Ionomer Cements; C074934:Ketac Endo; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D014867:Water; D012834:Silver; C028044:epoxy resin AH-26; C048769:tubliseal; D014025:Titanium; D008709:Methenamine; D001729:Bismuth