Bioreactive material for a prosthesis or composite implants

US5236458A · kind A · utility

Assignee

• S.A. FBFC International · BE

Inventors

• Paul Ducheyne · Via Enrico Fermi, US
• Louis Van Hove · Mol, BE
• Evert Schepers · Leuven, BE
• Raymond Kempenners · Mol, BE
• Marcel De Clercq, deceased · Virton, BE

Key dates

• Filing date: Aug 24, 1992
• Grant date: Aug 17, 1993
• Expiry date: Aug 24, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2214/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A sintered, shaped long-life dental implant or osseous prosthesis adapted for implantation into a human or animal body with chemical bonding to bone tissue. The implant or prosthesis is the result of sintering of a shaped mass of bioglass particles at or above a temperature softening the bioglass particles to form a bioreactive material having a composition comprising, by weight, 5-14% Na.sub.2 O, 0-12% P.sub.2 O.sub.5, 49-57% SiO.sub.2, and balance, no more than 33% CaO+CaF.sub.2, with the bioreactive material containing 0.5-7% CaF.sub.2. The implant or prosthesis has limited reactivity with bone tissue and a coefficient of expansion less than 10.sup.-5 K.sup.-1 from 0.degree. to 100.degree. C.