Inorganic particle analysis of dental impression elastomers

Brazilian Dental Journal

Hugo Lemes Carlo²  Rodrigo Borges Fonseca¹  Carlos José Soares¹  Américo Bortolazzo Correr¹  Lourenço Correr-sobrinho¹  Mário Alexandre Coelho Sinhoreti¹ 

[1] ,Federal University of Paraíba Health Sciences Center Department of Restorative DentistryJoão Pessoa PB ,Brazil

关键词: Dental impression materials;    scanning electron microscopy;    filler;   

DOI  :  10.1590/S0103-64402010000600007

来源: SciELO

【 摘 要 】

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, spherical-like, 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.

【 授权许可】

CC BY   
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