Bone substitute materials

A - Human Necessities – 61 – L

Patent

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Details

A61L 27/00 (2006.01) A61F 2/28 (2006.01) A61F 2/30 (2006.01) A61L 27/42 (2006.01) A61L 27/56 (2006.01) A61F 2/00 (2006.01) A61F 2/36 (2006.01) A61F 2/38 (2006.01)

Patent

CA 2305431

A strong, porous article useful as a bone substitute material and having an outer surface defining a shape having a bulk volume and having open interconnecting interstices extending throughout said volume and opening through said surface. The article comprises a continuous strong framework structure having interstices which interconnect throughout the bulk volume and a second continuous material occupying at least a portion of the same bulk volume as the framework structure. The second material comprises an osteoinductive and/or osteoconductive composition. This composition may be present in one of several forms. One of these is as a coating on the surface of the framework structure. A second form is in the form of a composite, intimately mixed with the framework material within the framework struts. The third form is as a porous mass within the interstices of the framework structure, having pores which are interconnecting with themselves, and with the interstices of the framework structure. Desirably, the porous osteoinductive or osteoconductive composition extends throughout said bulk volume. In a preferred embodiment, the framework structure is formed of a ceramic material. In a further embodiment, the framework structure may be further structurally reinforced with a dense material component integrally affixed thereto.

L'invention concerne un article résistant, poreux servant de matériau de substitut osseux et dont la surface externe définit une forme présentant un volume apparent, et comportant des interstices d'interconnexion ouverts traversant ce volume et débouchant sur ladite surface. Cet article comprend une structure d'ossature solide et continue présentant des interstices interconnectés à travers tout le volume apparent et un second matériau continu occupant au moins une partie du même volume apparent que la structure d'ossature. Le second matériau comprend une composition ostéoinductrice et/ou ostéoconductrice. Cette composition peut se présenter sous plusieurs formes différentes. Une de ces formes est un revêtement posé sur la surface de la structure d'ossature. Une seconde forme comprend un composite mélangé intimement au matériau d'ossature à l'intérieur des éléments d'ossature. La troisième forme est une masse poreuse dans les interstices de la structure d'ossature, présentant des pores interconnectées entre elles et avec les interstices de la structure d'ossature. Il est souhaitable que cette composition poreuse ostéoinductrice ou ostéoconductrice remplisse tout le volume apparent. Dans un mode de réalisation préféré, la structure d'ossature peut être encore davantage renforcée structurellement par un composant de matériau dense intégré à l'ossature.

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