Phosphocalcic cement composition comprising blood

A method for promoting spine fusion inside intersomatic cages, comprising the following steps:

• placing a fusion cage between two vertebral bodies, and
• injecting a bone cement paste inside said fusion cage, said bone cement paste comprising a powder component and a liquid component comprising blood;
• wherein the powder component comprises in relation to the total weight of said powder component:
• from 70% to 80% by weight of α-tricalcium phosphate (α-TCP) particles having an average size greater than or equal to 9 μm, wherein said average size is the mean equivalent diameter of said particles measured by LASER diffraction analysis,
• from 1% to 10% by weight of monocalcium phosphate monohydrate (MCPM),
• from 1% to 10% by weight of dicalcium phosphate dihydrate (DCPD),
• from 5% to 15% by weight of calcium-deficient apatite (CDA), and
• from 0.1% to 5% by weight of a cellulose ester;
• and
• wherein the liquid component (L)/powder component (P) ratio is between 0.3 and 0.7 mL/g;
• and
• wherein the bone cement paste has a setting time ranging from 10 minutes to 72 hours.