Matériau céramique frittable et/ou fusible, sa fabrication et son utilisation

Sinter- und/oder schmelzfähige keramische masse, deren herstellung und verwendung

Sinterable and/or fusible ceramic mass, production and use thereof

Abstract

Es wird eine sinter- und/oder schmelzfähige keramische Masse, umfassend einen langzeitstabilen Verbund kristalliner Phasen von Apatit, Wollastonit, Titanit und optional Cristobalit vorgeschlagen, der durch eine Glasphase stabilisiert ist und ein Herstellungsverfahren dafür. Die keramische Masse ist durch Sintern eines Gemischs erhältlich, umfassend zumindest die Bestandteile SiO 2 , CaO, P 2 O 5 , MgO, CaF 2 und TiO 2 allein oder in Kombination mit zumindest einem Alkalioxid, wobei das Alkalioxid ausgewählt ist unter Na 2 O und K 2 O. Weitere Ansprüche betreffen Verwendungen des gesinterten Materials in Form von Formkörpern zum Verfestigen, Reinigen, Aufrauen oder Polieren von Oberflächen medizinischer Implantate oder als Endoprothese.
The invention relates to a sinterable and/or fusible ceramic mass, comprising a long-term stable compound of crystalline phases of apatite, wollastonite, titanite and optionally cristobalite, which is stabilized by a glass phase, and a production process therefor. The ceramic mass can be obtained by sintering a mixture comprising at least the constituents SiO 2 , CaO, P 2 O 5 , MgO, CaF 2 and TiO 2 , on their own or in combination with at least one alkali oxide, the alkali oxide being chosen from NaO 2 and K 2 O. The invention further relates to uses of the sintered material in the form of moldings for strengthening, cleaning, roughening or polishing surfaces of medical implants or as a final prosthesis.
L'invention concerne un matériau céramique frittable et/ou fusible, comprenant un composite stable à long terme de phases cristallines d'apatite, de wollastonite, de titanite et éventuellement de cristobalite qui est stabilisé par une phase vitreuse et un procédé de fabrication de celui-ci. Le matériau céramique peut être obtenu par frittage d'un mélange comprenant au moins les constituants SiO 2 , CaO, P 2 O 5 , MgO, CaF 2 et TiO 2 seuls ou en combinaison avec au moins un oxyde alcalin, ce dernier étant sélectionné parmi Na 2 O et K 2 O. D'autres revendications concernent des utilisations du matériau fritté sous forme de corps moulés pour consolider, nettoyer, rugosifier ou polir des surfaces d'implants médicaux ou comme endoprothèse.

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