Journal article
Chemical and X-ray analyses of five brands of dental gutta-percha cone
International endodontic journal, Vol.36(4), pp.302-307
04/2003
DOI: 10.1046/j.1365-2591.2003.00653.x
PMID: 12702126
Abstract
To determine the chemical composition of five commercially available nonstandardized gutta-percha points.
The organic fraction (gutta-percha polymer and wax/resin) of nonstandardized gutta-percha points (Dentsply, Tanari, Konne, Obtura Spartan and Analytic Endodontics) was separated from the inorganic fraction (ZnO and BaSO4) by dissolution in chloroform. Gutta-percha polymer was precipitated with acetone. Zinc oxide was partially separated from barium sulphate by reaction with HCl. Energy-dispersive X-ray microanalysis and X-ray diffraction were employed to identify the chemical elements and compounds (barium sulphate and zinc oxide). The barium sulphate content was calculated by percentage of sulphur from elemental microanalysis. All analyses were repeated three times.
The means and standard deviations of the percentage by weight of gutta-percha in the points were: Dentsply (14.5 +/- 0.70%), Tanari (15.6 +/- 0.66%), Obtura (17.7 +/- 0.35%), Konne (18.9 +/- 0.32%) and Analytic (20.4 +/- 0.40%). The mean and SD of the zinc oxide content were: Dentsply (84.3 +/- 0.50%), Tanari (82.0 +/- 0.72%), Obtura (69.5 +/- 0.21%), Konne (78.0 +/- 0.05%) and Analytic (66.5 +/- 0.50%).
The method was appropriate to quantify gutta-percha and resin/wax components of gutta-percha points, but not barium sulphate and zinc oxide. An alternative procedure to determine barium sulphate and zinc oxide contents has been proposed based on elemental microanalysis of sulphur. Some brands of gutta-percha did not contain barium sulphate.
Details
- Title: Subtitle
- Chemical and X-ray analyses of five brands of dental gutta-percha cone
- Creators
- E D Gurgel-Filho - Department of Endodontics, University of Fortaleza, Fortaleza, Ceará, Brazil. gurgeleduardo@aol.comJ P Andrade FeitosaF B TeixeiraR C Monteiro de PaulaJ B Araújo SilvaF J Souza-Filho
- Resource Type
- Journal article
- Publication Details
- International endodontic journal, Vol.36(4), pp.302-307
- Publisher
- England
- DOI
- 10.1046/j.1365-2591.2003.00653.x
- PMID
- 12702126
- ISSN
- 0143-2885
- eISSN
- 1365-2591
- Language
- English
- Date published
- 04/2003
- Academic Unit
- Endodontics
- Record Identifier
- 9984065989002771
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