Composite bone graft substitute cement and articles produced...

A - Human Necessities – 61 – L

Patent

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Details

A61L 27/12 (2006.01) A61L 27/42 (2006.01)

Patent

CA 2619469

The invention provides a particulate composition adapted for forming a bone graft substitute cement upon mixing with an aqueous solution, including i) a calcium sulfate hemihydrate powder having a bimodal particle distribution and a median particle size of about 5 to about 20 microns, wherein the calcium sulfate hemihydrate is present at a concentration of at least about 70 weight percent based on the total weight of the particulate composition; ii) a monocalcium phosphate monohydrate powder; and iii) a .beta.-tricalcium phosphate powder having a median particle size of less than about 20 microns. Bone graft substitute cements made therefrom, a bone graft substitute kit comprising the particulate composition, methods of making and using the particulate composition, and articles made from the bone graft substitute cement are also provided.

L'invention concerne une composition particulaire conçue pour former un ciment de substitution de greffe osseuse lorsqu'on la mélange avec une solution aqueuse, comprenant i) une poudre de semi-hydrate de sulfate de calcium présentant une répartition particulaire bimodale et une granulométrie médiane d'environ 5 à 20 microns, le semi-hydrate de sulfate de calcium étant présent à une concentration d'au moins 70 % en poids sur la base du poids total de ladite composition particulaire; ii) une poudre de monohydrate de phosphate de monocalcium, et iii) une poudre de phosphate de ß-tricalcium présentant une granulométrie médiane inférieure à environ 20 microns. L'invention concerne également les ciments de substitution de greffe osseuse ainsi produits, un kit de substitution de greffe osseuse comprenant la composition particulaire, des procédés de production et d'utilisation de cette composition particulaire, et des articles produits à partir dudit ciment de substitution de greffe osseuse.

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