BIOACTIVE VITREOUS COMPOSITION FOR BONE IMPLANTS, FILAMENTS MADE THEREFROM AND METHOD

• Main Authors: LOCARDI, BRUNO, TRANQUILLI LEALI, PAOLO, VITA FINZI ZALMAN, EMILIO, GABBI, CARLO
• Format: Patent
• Language: English; French; German
• Published: 25.11.1992
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GLASS; HUMAN NECESSITIES; HYGIENE; JOINING GLASS TO GLASS OR OTHER MATERIALS; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; MINERAL OR SLAG WOOL; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TREATMENT OR PROTECTION OF EYES OR EARS

L'invention se rapporte à une composition vitrée bioactive destinée aux implantations osseuses comprenant les pourcentages en poids approximatifs des oxydes suivants: SiO2 de 40 to 55 %; P2O5 de 5 à 8 %, Cao (MgO) de 20 à 40 %; Na2 (K2O) de 20 à 30 %. La composition peut être réduite en filaments sans devenir céramique par adjonction d'un total ne dépassant pas 9 % en poids de K2O et Al2O3, le pourcentage de Al2O3 étant de 0,5 % à 2,5 %. Les filaments ainsi obtenus peuvent être utilisés pour la préparation de produits d'implantations osseuses sous forme de faisceaux de filaments, de gaze, de filets ou autres tissus, des feutres, des cotons hydrophiles et similaires, On peut réduire les filaments en particules de poudre pour application, entre autres, d'une couche de recouvrement de la composition vitrée sur une prothèse métallique permanente. The invention relates to a bioactive vitreous composition for bone implantation which includes the following approximate percentages by weight of the following oxides: SiO2 from 40 to 55 %; P2O5 from 5 to 8 %; Cao (MgO) from 20 to 40 %; Na2 (K2O) from 20 to 30 %. The composition can be reduced to filaments without becoming ceramic by virtue of the addition of a total of not more than 9 % by weight of K2O and Al2O3, the percentage of Al2O3 being from 0.5 % to 2.5 %. The filaments thus obtained can be used to prepare products for bone implantation in the form of bundles of filaments, gauzes, nets or other fabrics, felts, "cotton-wools" and the like. The filaments can be reduced to particles of powders for the application, inter alia, of a coating layer of the vitreous composition to a permanent metal prosthesis.