Glassy-crystalline material with low solubility and process of preparing the same

US6767854B2 · kind B2 · utility

Assignee

• BAM Bundesanstalt fuer Materialforschung und-pruefung · DE

Inventors

• Georg Berger · Panketal, DE
• Ute Ploska · Berlin, DE

Key dates

• Filing date: Jun 13, 2002
• Grant date: Jul 27, 2004
• Expiry date: Jun 26, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C10/16
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention refers to a material which is chemically long-term stable in a neutral or slightly acid environment and which can be used both as bioactive bone replacement material, e.g. in the form of a coating applied onto metallic prosthesis sticks by thermal spraying, and as substrate material in biotechnology, e.g. in the form of a ceramic sheet. According to the invention, said material comprises 15-45% by weight CaO, 40-45% by weight P2O5, 10-40% by weight ZrO2 and fluoride, said material further comprises two crystalline phases being apatite and calcium zirconium phosphate, and a secondary glass phase. Said material has a very high chemical long-term stability, compared to known materials which can also be produced by means of a melting process.