Patent ID: 8741982

Claim:
A bone cement that cures by radical polymerization, the bone cement consisting of: a radically polymerizing bone cement base material of a powder component of polymethylmethacrylate or polymethylmethacrylate copolymers with an initiator for effecting radical polymerization, an opacifier, and optionally a colorant; and a liquid component of methymethacrylate monomers with an activator or a co-initiator for effecting radical polymerization, a stabilizer, and optionally a colorant; an additive 1 consisting of monomers, wherein the monomers have free dissociatable or hydrolyzable anionic groups and at least one polymerizable unit, and optionally co-oligomers or copolymers of said monomers; optionally an additive 2 of water soluble calcium salts, wherein the solubility of the calcium salts in water is greater than 1 g/l; an additive 3 of biocompatible buffering substances having a highest buffering capacity in the neutral to slightly basic range; and optionally further additives selected from an x-ray contrast medium, antibiotics, antimicrobial agents, and anti-inflammatory agents; wherein said additives 1, 2, and 3 cause mineralization of the cement surface in the form of mineralized layers and the mineralized layers contain calcium phosphate phases.