Patent ID: 8642064

Claim:
Method of producing a self-hardening bioabsorbable composite material, wherein (i) a polymerisation initiator is immobilised with the aid of a first partial amount of an interconnectingly porous bioabsorbable inorganic bone regeneration material, (ii) a polymerisation activator is immobilised with the aid of a second partial amount of the bone regeneration material according to (i) or of a different interconnectingly porous bioabsorbable inorganic bone regeneration material, (iii) the components obtained in steps (i) and (ii) are mixed with a liquid or paste-form multi-functional monomer capable of polymerisation to form a biocompatible and bioabsorbable polymer or with a liquid or paste-form mixture of multi-functional monomers capable of polymerisation to form a biocompatible and bioabsorbable polymer, wherein at least one of the constituents mixed in is a water-soluble pore-forming substance which is added to the monomer, monomer mixture and/or the mixture thereof with the bone regeneration material in particulate form, and (iv) the monomer or monomer mixture contained in the mixture produced is polymerised and the composite material is obtained; wherein calcium phosphate having a pore volume, accessible to the polymerisation initiator and/or the polymerisation activator, of 0.4 cm 3 /g or more, while retaining the integrity of the particles of the bone regeneration material and having the following characteristic data is used as the interconnectingly porous bioabsorbable inorganic bone regeneration material: pore diameters from 0.1 to 500 μm; particle sizes (d 50 values) of from 1 to 500 μm; and BET surface area of at least 0.1 m 2 /g; and where the polymerization initiator and polymerization activator are contained in the pores of the porous bioabsorbable inorganic bone regeneration material.