Composite material for prosthetic purposes, a method for its preparation and use of the composite material or. Use of the manufacturing process for the coating of prostheses

摘要

The composite material for prosthetic purposes consists of a metallic component (2), for example titanium and of a bioactive material (3), for example bioglass ceramic. The bioactive material (3) has a particle size of between 5 and 1000 mu m in the metal phase (2). The composite material is produced in an encapsulated reaction chamber (5) in such a manner that an initial thoroughly-mixed powder or particulate mixture (4) is subjected to an isostatic compression process, possibly with the use of an elevated temperature. The process parameters of pressure, temperature and time can be selected in a freely-variable manner with large limits. The reaction chamber (5) is made of a capsule-type receptacle (6), which is evacuated in advance via a capsule opening (6a) and then hermetically closed. Special requirements have to be imposed on the choice of the glass used for the glass receptacle (6). For specific purposes a metal encapsulation can also be provided. Metal prostheses can be provided in their surface region with recesses in which the composite material (1) as described in the invention is inserted with a precise fit. The prosthesis thus equipped can then be again inserted in a capsule-type receptacle made of metal or glass and subjected to an isostatic compression process. In this way, the inserted bioactive composite material elements are firmly welded. The process is suitable also for the coating of a metal or ceramic implant. For this purpose, the implant is inserted into a capsule which is then enclosed with the initial powder mixture (4) and after that is evacuated. As a result of isostatic compression the composite material adheres as a coating material.