Packable ceramic beads for bone repair

A - Human Necessities – 61 – L

Patent

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Details

A61L 27/10 (2006.01) A61F 2/28 (2006.01) A61L 27/12 (2006.01) A61L 27/34 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/30 (2006.01) A61F 2/44 (2006.01)

Patent

CA 2407340

Adherent packed beds of ceramic beads, each comprising a ceramic body coated with a biodegradable polymer, and fabric bags containing such beads in a packed, self-supporting configuration. The polymeric coating provides some resilience to a packed bed of the ceramic beads, and prevents the beads from moving with respect to each other when placed under stress, leading to reduced breakage. The ceramic beads desirably are osteoconductive, and preferably are formed of a ceramic material that is resorbed during bone growth, such as hydroxyapatite, tricalcium phosphate, or mixtures of these materials. The beads may contain, either internally or on their surfaces or both, a bone morphogenic protein, and the latter may also be included in the biodegradable polymer coatings on the beads.

L'invention concerne des lits de perles en céramique en paquets adhésifs, chacun comprenant un corps en céramique revêtu d'un polymère biodégradable, et des sacs en tissu contenant ces perles en configuration autoportante et en paquets. Le revêtement polymère donne une certaine résilience à un lit en paquet des perles en céramique, et empêche ces perles de bouger les unes par rapport aux autres lorsqu'elles sont sous contrainte, ce qui réduit les risques de cassure. Les perles en céramique sont, de préférence, ostéoconductives et, de préférence, en matériau céramique se résorbant durant la croissance osseuse, par exemple de l'hydroxyapatite, du phosphate tricalcique, ou des mélanges de ces matériaux. Les perles peuvent contenir, soit à l'intérieur, soit à surface, soit aux deux, une protéine morphogénique osseuse, laquelle peut être intégrée dans les revêtements polymères biodégradables des perles.

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