Body for providing ingrowth and growth of bone tissue and/or...

A - Human Necessities – 61 – L

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A61L 27/06 (2006.01) A61F 2/28 (2006.01) A61F 2/44 (2006.01) A61L 27/52 (2006.01) A61L 27/56 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2370724

A body, such as a grain, for providing ingrowth and growth of bone tissue and/or connective tissue. The body consists of a plastic or non-essentially elastic biocompatible material, preferably metal or metal alloy. It is also porous, having the following porosity characteristics: (a) the porosity is continuous and (b) the opening of cavities/indentations/pockets and the ducts connecting them has the width of > about 50 µm for bone tissue and > about 10 µm for connective tissue. In a method of making such a body, the body has been produced by blowing gas into a melt of metal. An advantageous use of bodies according to the invention is enclosing thereof in a casing, formed with openings, for making an implant, such as a spinal implant.

L'invention concerne un corps, tel qu'un grain, destiné à permettre l'interposition et la croissance de tissu osseux et/ou de tissu conjonctif. Le corps est constitué d'une matière plastique ou d'une matière biocompatible non essentiellement élastique, de préférence un métal ou un alliage métallique. Le corps est en outre poreux, possédant les caractéristiques de porosité suivantes : a) la porosité est continue et b) la largeur de l'ouverture des cavités, des indentations ou des poches et des veines les reliant est supérieure à environ 50µm pour le tissu osseux et à environ 10 µm pour le tissu conjonctif. Dans un mode de fabrication, on fabrique le corps par insufflation de gaz dans un bain de métal. Le corps de la présente invention trouve une utilisation avantageuse lorsqu'il est incorporé dans un boîtier pourvu d'ouvertures, de façon à produire un implant, tel qu'un implant rachidien.

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