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Type: Artigo de periódico
Title: Chemical Composition And Thermal Behavior Of Five Brands Of Thermoplasticized Gutta-percha.
Author: Maniglia-Ferreira, Claudio
Gurgel-Filho, Eduardo Diogo
de Araújo Silva, João Batista
de Paula, Regina Célia Monteiro
de Andrade Feitosa, Judith Pessoa
de Sousa-Filho, Francisco José
Abstract: The aim of this study was determine the chemical composition and thermal behavior of Thermafil (TH), Microseal Cone (MC), Microseal Microflow (MF), Obtura (OB) and Obtura Flow (OF). In addition, their thermal behavior in response to temperature variations was studied by differential scanning calorimetry (DSC) to determine the temperature at which gutta-percha switches from the beta to alpha form, and from the alpha to the amorphous phase. The organic and inorganic fractions were separated by dissolution in chloroform. Gutta-percha (GP) was precipitated with acetone. The inorganic fraction was analyzed via Elemental Microanalysis. Energy Dispersive X-ray Microanalysis and X-ray Diffraction were used to identify the chemical elements and compounds (BaSO4 and ZnO). Thermal analysis was conducted using DSC. The organic and inorganic fractions ranged from 21.3% and 26.9% of weights, respectively. MC and MF showed the highest percentages of organic compounds (P = 0.0125). All specimens exhibited two crystalline transformations when heated from ambient temperature to 130°C. MC presented the highest percentage of GP. No correlation was observed between chemical composition and thermal behavior. Each of the products showed thermal behavior that is typical of beta-phase gutta-percha.
Subject: Chemical Composition
Root Canal Filling Materials
Thermal Behavior
Thermoplastic Obturation
Citation: European Journal Of Dentistry. v. 7, n. 2, p. 201-6, 2013-Apr.
Rights: aberto
Identifier DOI: 10.4103/1305-7456.110173
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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