C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 34/12 (2006.01) A61F 2/30 (2006.01) A61L 27/04 (2006.01) A61L 27/30 (2006.01) A61L 27/56 (2006.01) B22F 3/10 (2006.01) B22F 3/11 (2006.01) C22B 34/24 (2006.01) C23C 10/30 (2006.01) C23C 24/08 (2006.01) C23C 26/00 (2006.01) A61F 2/00 (2006.01) A61F 2/28 (2006.01) A61F 2/36 (2006.01)
Patent
CA 2438801
The invention is directed to a method of preparing porous metals, as well as to these porous metals per se. More in particular the invention is directed to the use of these porous metals in the preparation of medical items, such as implants. The invention further relates to a method of providing a porous metal coating on a substrate, in particular on the surface of a medical item, such as an implant or scaffold for tissue engineering. According to the method of the invention, a polymeric foam is impregnated with a slurry of metal particles, such as titanium, tantalum, titanium alloy or tantalum alloy particles. The impregnated foam is subsequently dried and subjected to pyrolysis and subsequent sintering. Due to the presence of metal hydrides, the formation of undesired compounds, such as metal oxides or nitrides, is avoided.
L'invention concerne un procédé de préparation de métaux poreux, ainsi que les métaux poreux eux-mêmes. Plus spécialement, l'invention concerne l'utilisation de ces métaux poreux dans la préparation d'articles médicaux, tels que des implants. L'invention concerne également un procédé destiné à fournir un revêtement métallique poreux sur un substrat, notamment sur la surface d'un article médical, tel qu'un implant ou une charpente pour le génie tissulaire. Conformément au procédé, une mousse polymère est imprégnée d'une suspension de particules métalliques, telles que du titane, du tantale, ou des particules d'alliage de titane ou de tantale. La mousse imprégnée est ensuite séchée et soumise à une pyrolyse puis à un frittage. La présence d'hybrides métalliques permet d'éviter la formation de composés indésirables, tels que des oxydes métalliques ou des nitrures.
de Groot Klaas
Layrolle Pierre Jean Francois
Li Jia Ping
Gowling Lafleur Henderson Llp
Isotis N.v.
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