Temporary adhesive for metal-metal and metal-ceramic bonds

US7223808B2 · kind B2 · utility

Assignees

• Humboldt-Universitaet Berlin, Charite Universitaetsklinikum · DE
• BAM Bundesanstalt fuer Materialforschung und-pruefung · DE
• Vita Zahnfabrik H. Rauter GmbH & Co. KG · DE

Inventors

• Wolf-Dieter Muller
• Georg Berger · Panketal, DE
• Emil Nagel · Annaberg-Buchholz, DE
• Klaus-Peter Lange · Eppstein, DE

Key dates

• Filing date: Jun 14, 2002
• Grant date: May 29, 2007
• Expiry date: Jan 16, 2024

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L27/446
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to a method for the production of an adhesive and an adhesive kit for joining similar or different metal surfaces or ceramics, especially in the field of biomedicine. The objective of the invention is to avoid polymerization-linked by-products and disadvantageous effects, in addition to enabling a temporary biocompatible bond between metal and metal or metal and ceramics. The inventive method consist in using a monomer-free polymethylmethacrylate which is mixed with a suitable, non-toxic solvent and a bioactive vitreous-crystalline material with a particle size ranging from 0.05–20μ, consisting of 15–45 wt. % CaO, 40–45 wt. % P2O5, 10–40 wt. % ZrO2 and 0.7–3.5 wt. % fluoride, having apatite and calcium zircon phosphate as main crystal phases and a glass phase as an auxiliary component until a flowable mixture is obtained. The invention also relates to an adhesive kit consisting of said components. Sufficient amounts of resistance are obtained for a temporary bond, enabling the bond to be neutralized when desired.