Inorganic particle analysis of dental impression elastomers
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Data
2010
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Resumo
The aim of this study was to determine quantitatively and qualitatively the inorganic particle fraction of commercially available dental
elastomers. The inorganic volumetric fraction of two addition silicones (Reprosil Putty/Fluid and Flexitime Easy Putty/Fluid), three
condensation silicones (Clonage Putty/Fluid, Optosil Confort/Xantopren VL and Silon APS Putty/Fluid), one polyether (Impregum Soft
Light Body) and one polysulfide (Permlastic Light Body) was accessed by weighing a previously determined mass of each material
in water before and after burning samples at 600ºC, during 3 h. Unsettled material samples were soaked in acetone and chloroform
for removal of tthe organic portion. The remaining filler particles were sputter-coated with gold evaluation of their morphology and
size, under scanning electron microscopy (SEM). Flexitime Easy Putty was the material with the highest results for volumetric particle
fraction, while Impregum Soft had the lowest values. Silon 2 APS Fluid presented the lowest mean filler size values, while Clonage
Putty had the highest values. SEM micrographs of the inorganic particles showed several morphologies - lathe-cut, spherical, sphericallike,
sticks, and sticks mixed to lathe-cut powder. The results of this study revealed differences in particle characteristics among the
elastometic materials that could lead to different results when testing mechanical properties.
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Palavras-chave
Dental impression materials, Scanning electron microscopy, Filler
Citação
CARLO, Hugo Lemes et al. Inorganic particle analysis of dental impression elastomers. Brazilian Dental Journalm, Ribeirão Preto, v. 21, n. 6, p. 520-527, 2010.