Bone-forming graft

A - Human Necessities – 61 – L

Patent

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Details

A61L 27/00 (2006.01) A61F 2/28 (2006.01) A61L 27/18 (2006.01) A61L 27/20 (2006.01) A61L 27/22 (2006.01) A61L 27/44 (2006.01) A61L 27/54 (2006.01) A61L 27/56 (2006.01)

Patent

CA 2200052

An osteoplastic graft comprising a bone inducer supported on a composite porous body comprising a porous structure of a bioabsorbable hydrophilic material and a surface layer of a bioabsorbable polymeric material. Preferably, the hydrophilic material comprises at least one member selected from the group consisting of gelatin, hyaluronic acid and derivatives thereof, collagen and derivatives thereof, chitosan and derivatives thereof, and triethanolammonium alginate, while the polymeric material comprises at least one member selected from the group consisting of polylactic acid, polylactic acid-polyglycolic acid copolymer, and poly[bis(p-carboxyphenoxy)propane] anhydride-sebacid acid copolymer. As the graft is excellent in moldability and operability and has an internal structure suitable for in vivo bone neogenesis, bone grafting occurs not only at the periphery of the graft but also within the graft.

L'invention concerne un greffon ostéoplastique comprenant un inducteur osseux supporté par un corps composite poreux constitué d'une structure poreuse en matière hydrophile bioabsorbable et d'une couche superficielle en matière polymère bioabsorbable. La matière hydrophile comprend, de préférence, au moins un élément choisi dans le groupe comprenant la gélatine, l'acide hyaluronique, des dérivés de celui-ci, le collagène et ses dérivés, le chitosane et ses dérivés, et l'alginate de triéthanolammonium, et la matière polymère comprend au moins un élément choisi dans le groupe acide polylactique, copolymère d'acide polylactique/acide polyglycolique et copolymère d'acide sébacique-poly[bis(p-carboxyphénoxy)propane]anhydride. Du fait que le greffon présente une moulabilité et une opérabilité excellentes ainsi qu'une structure interne convenant à la néogénèse osseuse in vivo, la greffe osseuse s'effectue non seulement à la périphérie du greffon mais également à l'intérieur de celui-ci.

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