Modified phosphocalcic compound, injectable composition...

A - Human Necessities – 61 – L

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A61L 27/12 (2006.01) A61L 27/54 (2006.01)

Patent

CA 2477756

The invention concerns a phosphocalcic compound modified by a gem-bisphosphonic acid or one of its salts, a method for preparing same, as well as its use for preparing an injectable composition. The modified phosphocalcic compound is obtained by adding a gem-bisphosphonic acid or one of its alkali metal or alkaline earth salts to a suspension of a precursor phosphocalcic compound in ultra-pure water, while stirring the reaction medium at room temperature, then in recovering by centrifuging the formed compound. Said compound is useful for making an injectable composition, for use in the treatment of bone remodeling equilibrium.

L'invention concerne un composé phosphocalcique modifié par un acide gem- biphosphonique ou l'un de ses sels, un procédé pour sa préparation, ainsi que son utilisation pour l'élaboration d'une composition injectable. Le composé phosphocalcique modifié est obtenu en ajoutant un acide gem-biphosphonique ou l'un de ses sels de métal alcalin ou alcalino-terreux à une suspension d'un composé phosphocalcique précurseur dans l'eau ultra-pure, en agitant le milieu réactionnel à température ambiante, puis en récupérant par centrifugation le composé formé. Ce composé est utile pour l'élaboration d'une composition injectable, utilisable pour le traitement de déséquilibre du remodelage osseux.

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