title: Characterization of morphology and composition of inorganic fillers in dental alginates.
abstract: Energy dispersive X-ray spectroscopy microanalysis (EDX), scanning electron microscopy (SEM), and Archimedes' Principle were used to determine the characteristics of inorganic filler particles in five dental alginates, including Cavex ColorChange (C), Hydrogum 5 (H5), Hydrogum (H), Orthoprint (O), and Jeltrate Plus (JP). The different alginate powders (0.5 mg) were fixed on plastic stubs (n = 5) and sputter coated with carbon for EDX analysis, then coated with gold, and observed using SEM. Volume fractions were determined by weighing a sample of each material in water before and after calcining at 450(°)C for 3 h. The alginate materials were mainly composed of silicon (Si) by weight (C-81.59%, H-79.89%, O-78.87%, H5-77.95%, JP-66.88%, wt). The filler fractions in volume (vt) were as follows: H5-84.85%, JP-74.76%, H-70.03%, O-68.31%, and C-56.10%. The tested materials demonstrated important differences in the inorganic elemental composition, filler fraction, and particle morphology.
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Ricardo Danil
authors.initials: RD
authors.lastname: Guiraldo
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Sandrine Bittencourt
authors.initials: SB
authors.lastname: Berger
authors.affiliation: Department of Prosthodontics and Periodontics, Piracicaba Dental School, State University of Campinas (UNICAMP), Avenida Limeira 901, 13414-903 Piracicaba, SP, Brazil.
authors.forename: Rafael Leonardo Xediek
authors.initials: RL
authors.lastname: Consani
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas (UNICAMP), Avenida Limeira 901, 13414-903 Piracicaba, SP, Brazil.
authors.forename: Simonides
authors.initials: S
authors.lastname: Consani
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Rodrigo Varella
authors.initials: RV
authors.lastname: de Carvalho
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Murilo Baena
authors.initials: MB
authors.lastname: Lopes
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Luciana Lira
authors.initials: LL
authors.lastname: Meneghel
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Fabiane Borges
authors.initials: FB
authors.lastname: da Silva
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas (UNICAMP), Avenida Limeira 901, 13414-903 Piracicaba, SP, Brazil.
authors.forename: Mário Alexandre Coelho
authors.initials: MA
authors.lastname: Sinhoreti
mesh_terms: D000464:Alginates / Q000737:chemistry / Q000648:ultrastructure*; D002244:Carbon / Q000737:chemistry; D003793:Dental Restoration, Permanent; D006801:Humans; D007287:Inorganic Chemicals / Q000737:chemistry*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D012825:Silicon / Q000737:chemistry; D013052:Spectrometry, X-Ray Emission; D013499:Surface Properties
chemical_list: D000464:Alginates; C098917:Hydrogum; D007287:Inorganic Chemicals; C050135:cavex; D002244:Carbon; D012825:Silicon