Analysis of filler particle levels and sizes in dental alginates

Materials Research

Hugo Lemes Carlo²  Rodrigo Borges Fonseca¹  Luciano De Souza Gonçalves¹  Lourenço Correr-sobrinho¹  Carlos José Soares¹  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;    alginate;    scanning electron microscopy;    filler;   

DOI  :  10.1590/S1516-14392010000200022

来源: SciELO

【 摘 要 】

The aim of this study was to determine the inorganic filler fractions and sizes of commercially alginates. The inorganic particles volumetric fractions of five alginates - Jeltrate(J), Jeltrate Plus(JP), Jeltrate Chromatic Ortho(JC), Hydrogum(H) and Ezact Krom(E) were accessed by weighing a previously determined mass of each material in water before and after burning samples at 450 °C for 3 hours. Unsettled materials were soaked in acetone and chloroform and sputter-coated with gold for SEM evaluation of fillers' morphology and size. The results for the volumetric inorganic particle content were (%): J - 48.33, JP - 48.33, JC - 33.79, H - 37.55 and E - 40.55. The fillers presented a circular appearance with helical form and various perforations. Hydrogum fillers looked like cylindrical, perforated sticks. The mean values for fillers size were (μm): J - 12.91, JP - 13.67, JC - 13.44, E - 14.59 and H - 9 (diameter), 8.81 (length). The results of this study revealed differences in filler characteristics that could lead to different results when testing mechanical properties.

【 授权许可】

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