Calcium phosphate composition and method of preparing same

Details Calcium phosphate composition and method of preparing same Calcium phosphate composition and method of preparing same

A - Human Necessities

61

L

A61L 27/12 (2006.01) A61L 24/02 (2006.01)

Patent

CA 2430728

A method for controlling the formation of a hydroxyapatite bone filler from dry calcium phosphate precursors in an aqueous solution uses coated sodium phosphate powder. The sodium phosphate powder is coated with a water soluble cellulose. Until the calcium dissolves in the aqueous solution setting of the cellulose phosphate cements proceeds slowly but when the exposed sodium phosphate particles start to solubilize in the aqueous solution the setting rate increases.

L'invention concerne un procédé permettant de réguler le remplissage osseux avec de l'hydroxyapatite provenant de précurseurs de phosphate de calcium sec dans une solution aqueuse et utilisant une poudre de phosphate de sodium enrobée. Ladite poudre est revêtue d'une cellulose hydrosoluble. Tant que le calcium se dissout dans la solution aqueuse, le durcissement du ciment à base de phosphate de cellulose s'effectue lentement, en revanche lorsque les particules de phosphate de sodium exposées commencent à se solubiliser dans la solution aqueuse, la vitesse de durcissement augmente.

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