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US 4,202,055 AGranted
Anchorage for highly stressed endoprostheses
AssigneeBattelle-Institut e.V.
InventorsRoland Reiner, Helmut Heide, Kari Koster
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AssigneeBattelle-Institut e.V.
InventorsRoland Reiner, Helmut Heide, Kari Koster
Estimating the term…
An implantable prosthesis anchorage which contains a non-porous outer coating in the regions which is positioned in contact with bone. The non-porous outer coating consists of (i) at least one bioactive resorbable ceramic material which is a calcium phosphate and (ii) at least one polymer which is mechanically and chemically stable in the body. The ceramic material is in particulate form having particle diameters between 0.5 and 1 mm. The ceramic material particles is incorporated in the polymer in such a way that resorption of the ceramic material leads to a polymer structure with continuous pores filled with living bone tissue. Bioactivating bonding residues of the ceramic material are left on the inner surfaces of the filled pores which were created by the resorption of the ceramic material.
An implantable prosthesis anchorage which contains a non-porous outer coating in the regions which will be positioned in contact with bone, the non-porous outer coating consisting of (i) at least one bioactive resorbable ceramic material which is a calcium phosphate and (ii) at least one polymer which is mechanically and chemically stable in the body, the ceramic material being in particulate form having particle diameters between 0.5 and 1 mm, and the ceramic material particles being incorporated in the polymer in such a way that resorption of the ceramic material leads to a polymer structure with continuous pores filled with living bone tissue, bioactivating bonding residues of the ceramic material being left on the inner surfaces of the filled pores which have been created by the resorption of the ceramic material.
An implantable prosthesis anchorage which contains a non-porous outer coating in the regions which will be positioned in contact with bone, the non-porous outer coating consisting of (i) at least one bioactive resorbable ceramic material which is a calcium phosphate and (ii) at least one polymer which is mechanically and chemically stable in the body, the ceramic material being in particulate form having particle diameters between 0.5 and 1 mm, the ceramic material particles being incorporated in the polymer in such a way that resorption of the ceramic material leads to a polymer structure with continuous pores filled with living bone tissue, bioactivating bonding residues of the ceramic material being left on the inner surfaces of the filled pores which have been created by the resorption of the ceramic material, and, prior to incorporation in the polymer, the ceramic particles have been charged on the surface with polymer-affine molecules which induced a firm chemical bond of the calciun phosphate to the polymer in the region of the ceramic/polymer interface.
Dependencies are inferred from the claim text.