Calcium phosphate cement, use and preparation thereof

C - Chemistry – Metallurgy – 04 – B

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C04B 12/02 (2006.01) A61L 24/02 (2006.01)

Patent

CA 2520367

Monophasic TTCP particles having surfaces covered with whiskers or fine crystals with a width ranging from 2 to 500 nm and a length ranging from 5 to 5000 nm are provided and methods for their preparation. In another embodiment, methods are provided for using such monophasic TTCP particles to prepare a calcium phosphate cement having the consistency of paste that sets to form a substance with a compressive strength of about 10 MPa after setting for about 30 minutes and a compressive strength of about 25 MPa within 24 hours of exposure to in vivo conditions. The paste can be used directly to treat a defect in a bone or a tooth in a patient or the paste can be shaped and implanted into the defect.

Particules de phosphate tricalcique monophasique dont les surfaces sont couvertes de barbes ou de fins cristaux d'une largeur allant de 2 à 500 nm et d'une longueur allant de 5 à 5000 nm, et procédé de préparation desdites particules. Dans un autre mode de réalisation, des procédés concernent l'utilisation de ces particules de phosphate tricalcique monophasique pour préparer un ciment à base de phosphate de calcium ayant la consistance d'une pâte qui durcit pour former une substance ayant une résistance à la compression d'environ 10 MPa après durcissement pendant environ 30 minutes et une résistance à la compression d'environ 25 MPa au bout de 24 heures d'une exposition à des conditions in vivo. Ladite pâte peut être utilisée directement pour traiter un défaut dans un os ou une dent d'un patient, ou peut être façonnée et implantée dans ledit défaut.

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