Reinforced bone graft substitutes

Details Reinforced bone graft substitutes Reinforced bone graft substitutes

A - Human Necessities

61

F

A61F 2/44 (2006.01) A61L 27/04 (2006.01) A61L 27/36 (2006.01)

Patent

CA 2293758

One embodiment of a spinal spacer (10) includes a body (11) sized and configured for engagement between adjacent vertebrae (V). The body (11) includes two opposite faces (12, 14) and an outer surface (13) between the two faces (12, 14). In one embodiment, the body (11) includes deactivated bone material in synergistic combination with a bone growth factor. A sleeve (15) is disposed around the outer surface (13) of the body (11). The sleeve (15) is composed of a second material which is relatively stronger under compressive loads than the biocompatible material of the body (11). Also provided is a plurality of apertures (16) through the sleeve (15) in communication with the outer surface (13) of the body (11) for bone ingrowth. Means for attaching the sleeve to the endplates of adjoining vertebral bodies are also provided.

Un mode de réalisation d'un écarteur spinal (10) comprend un corps (11) dimensionné et configuré pour venir s'engager entre deux vertèbres adjacentes (V). Ce corps (11) comporte deux faces opposées (12, 14) et une surface externe (13) située entre ces deux faces (12, 14). Dans un mode de réalisation, ce corps (11) contient la matière osseuse désactivée en combinaison synergique avec un facteur de croissance osseuse. Un manchon (15) est disposé autour de la surface externe (13) du corps (11). Ce manchon (15) se compose d'une seconde matière qui est relativement plus résistante aux charges compressives que la matière biocompatible du corps (11). Plusieurs ouvertures (16) sont également prévues à travers le manchon (15) en communication avec la surface externe (13) du corps (11) pour permettre une croissance osseuse interne. Des moyens pour fixer le manchon aux plateaux terminaux des deux corps vertébraux adjacents sont également prévus.

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