Composite and its use
OwnerHeimo Ylänen, Hannu Aro +2inventors
InventorsHeimo Ylänen, Hannu Aro, Kaj Karlsson, Antti Yli-Urpo
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Abstract
A porous composite suitable for filling a recess or a through-passing hole in an implant. The composite includes particles A prepared from a bioactive material and particles B prepared from a non-bioactive material or weakly bioactive material, which is sintratable with the bioactive material, such that particles A and particles B have been sintered together to a porous composite. Particles A and particles B are essentially homogeneous in size. Also disclosed is an implant which contains a core and the composite.
Claims14
A porous composite, which is intended to be filled into a recess or a through-passing hole of an implant, and which comprises:
- particles A prepared from a bioactive material which will react in the physiological conditions within the body so that an outermost layer of a block of said bioactive material forms a chemical bond with surrounding host tissue, and
- particles B, which are prepared from a non-bioactive material or from a weakly bioactive material which under physiological conditions does not dissolve within the first few months, wherein the particles A and the particles B are partially melted together to form a porous composite having a three dimensional structure in which individual particles are connected to at least one adjacent particle but retain a substantially spherical individual shape, characterized in that the particles A and B are essentially homogeneous in size, and wherein said particles A and particles B are approximately the same size compared to one another, and have a diameter of at least 250 microns.
An implant comprising a core having a recess or a through-passing hole and a bioactive structural component contained within said recess or through-passing hole and which extends to the surface of the implant, wherein said bioactive structural component comprises a layer of a porous composite which comprises:
- particles A prepared from a bioactive material which will react in the physiological conditions within the body so that the outermost layer of a block manufactured from said bioactive material forms a chemical bond with surrounding host tissue, and
- particles B, which are prepared from a non-bioactive material or from a weakly bioactive material which under physiological conditions does not dissolve within the first few months, wherein the particles A and the particles B are partially melted together to form a porous composite having a three dimensional structure in which individual particles are connected to one at least one adjacent particle but retain a substantially spherical individual shape, characterized in that the particles A and B are essentially homogeneous in size, and wherein said particles A and particles B are approximately the same size compared to each other, and have a diameter of at least 250 microns.
Dependencies are inferred from the claim text.