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Visibly transparent & radiopaque inorganic organic composites from flame-made mixed-oxide fillers

Mädler, Lutz ; Krumeich, Frank ; Burtscher, Peter ; Moszner, Norbert

In: Journal of Nanoparticle Research, 2006, vol. 8, no. 3-4, p. 323-333

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    Titel
    • Visibly transparent & radiopaque inorganic organic composites from flame-made mixed-oxide fillers
    Autor
    • Mädler, Lutz. Department of Mechanical and Process Engineering, Particle Technology Laboratory, CH-8092, ETH Zürich, Switzerland
    • Krumeich, Frank. Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, CH-8093, ETH Zürich, Switzerland
    • Burtscher, Peter. Ivoclar Vivadent AG, FL-9494, Schaan, Liechtenstein
    • Moszner, Norbert. Ivoclar Vivadent AG, FL-9494, Schaan, Liechtenstein
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Journal of Nanoparticle Research, 2006, vol. 8, no. 3-4, p. 323-333. Kluwer Academic Publishers
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:316755
    Summary
    Radiopaque composites have been produced from flame-made ytterbium/silica mixed oxide within a crosslinked methacrylate resin matrix. The refractive index of the filler powder increased with ytterbium oxide loading. A high transparency was achieved for a matching refractive index of the filler powder and the polymer in comparison to commercial materials with 52wt% ceramic filling. It was demonstrated that powder homogeneity with regard to particle morphology and distribution of the individual metal atoms is essential to obtain a highly transparent composite. In contrast, segregation of crystalline single-oxide phases drastically decreased the composite transparency despite similar specific surface areas, refractive indices and overall composition. The superior physical strength, transparency and radiopacity compared to composites made from conventional silica based-fillers makes the flame-made mixed-oxide fillers especially attractive for dental restoration materials