Synthetic collagen orthopaedic structures such as grafts,...

A - Human Necessities – 61 – L

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A61L 27/00 (2006.01) A61L 27/24 (2006.01) A61L 27/48 (2006.01) D01F 4/00 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2204753

An improved biodegradable and biocompatible reconstituted monofilament collagen fiber having increased strength and elasticity is disclosed. The method of manufacture of the fiber, comprising a water bath step following a dehydration step, is also disclosed. Several embodiments of the collagen fiber are disclosed, including grafts, prosthetic devices, bundles of the fibers where the fibers of the bundle are tensioned and fail substantially in unison, and methods thereof. The fibers of the invention, or the embodiments of the fibers, may be coated or embedded in a polymer to protect the fibers and to bind them together. Additionally, proteoglycans may be incorporated into the fibers to enhance the ultimate tensile strength of the fibers.

L'invention se rapporte à une fibre de collagène monofilament améliorée, reconstituée, biodégradable et biocompatible, présentant une résistance et une élasticité améliorées. Le procédé de fabrication de la fibre, qui comprend une étape de passage dans un bain d'eau et une étape de déshydratation, est également décrit. L'invention porte en outre sur plusieurs modes de réalisation de la fibre de collagène, permettant d'obtenir des greffons, des dispositifs prothétiques et des faisceaux de fibres dans lesquels les fibres sont tendues ensemble de manière à présenter pratiquement le même seuil de rupture, ainsi que sur les procédés associés. Les fibres selon l'invention, ou leurs variantes, peuvent être enrobées d'un polymère ou noyées dans un polymère qui les protège et les relie entre elles. En outre, on peut incorporer des protéoglycanes dans les fibres afin d'en augmenter la résistance finale à la traction.

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