Improved customized-shape ceramic fillers for dental...

A - Human Necessities – 61 – K

Patent

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A61K 6/083 (2006.01) C01B 13/32 (2006.01) C01B 13/36 (2006.01) C04B 14/00 (2006.01) C08K 7/00 (2006.01)

Patent

CA 2348066

Ceramic filler compositions of customized shapes (Figures 1-30) according to the present invention, include ceramic and glass-ceramic particles having a customized shape which provides mechanical locking within a resin matrix giving significantly improved fracture toughness performance for a resin/glass or ceramic composite system. The material has particular application as a tooth filling material with significantly improved wear resistance. The wide range of unique-shaped filler particles are produced using wet chemistry methods according to the invention of preparing the ceramic particles for use in a resin matrix composite material. Such composite materials have a very wide application, especially as a dental composite filling material for restoring a tooth.

La présente invention concerne des compositions de charge en céramique de formes personnalisées (Figures 1-30) comprenant des particules de céramique et de vitrocérame de formes personnalisées qui permettent d'obtenir un blocage mécanique dans une matrice de résine conférant à un système résine/verre ou composite céramique, une amélioration de la résistance à la fracture. Le matériau trouve une application particulière en tant que matériau de charge dentaire avec une résistance au cisaillement sensiblement améliorée. Selon l'invention, le large domaine de particules de charge à forme unique est produit au moyen de procédés de chimie aqueuse de préparation de particules de céramique destinées à être utilisées dans un matériau composite à matrice de résine. De tels matériaux composites présentent des applications très nombreuses, spécialement comme matériau de charge dentaire destiné à restaurer une dent.

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