Spinal fusion procedure using an injectable bone substitute

A - Human Necessities – 61 – F

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A61F 2/44 (2006.01)

Patent

CA 2545185

Methods for performing spinal fusions using an injectable calcium phosphate- based bone substitute are provided. The injectable bone substitute is injected into the anterior portion of an interbody space and allowed to solidify in vivo. The injectable bone substitute has a minimum compression strength of 10 MPa after setting for about 30 minutes and preferably solidifies to a compression strength of 25 MPa within 24 hours of injection. Optionally, the posterior portion of the interbody space is fixed using a metallic implant selected from rods and pedicle screws or plates and pedicle screws by attachment thereof to adjacent vertebrae.

L'invention porte sur des procédés de fusion vertébrale au moyen d'un substitut osseux à base de phosphate de calcium pouvant être injecté. Ce substitut osseux pouvant être injecté est injecté dans la partie avant d'un espace intercorporel et peut ainsi se solidifier in vivo. Ce substitut osseux pouvant être injecté présente une force de compression minimale de 10 MPa après sa mise en place, pendant environ 30 minutes, et se solidifie de préférence à une force de compression de 25 MPa dans les 24 heures qui suivent l'injection. Facultativement, la partie arrière de l'espace intercoporel est fixée au moyen d'un implant métallique choisi parmi des éléments tels des tiges et des vis de pédicule ou des plaques et des vis de pédicule par fixation de ceux-ci aux vertèbres adjacentes.

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