CIMENT ORTHOPEDIQUE DE POLYMETHYLMETHACRYLATE A VISCOSITE INITIALE AJUSTABLE ET UNE METHODE DE PRODUCTION D'UNE PATE DE CIMENT ORTHOPEDIQUE A VISCOSITE INITIALE VARIABLE
The subject matter of the invention is a polymerisable polymethylmethacrylate bone cement, in which the initial viscosity of the cement dough can be controlled. The polymerisable bone cement corresponds to a composition comprising a monomer for radical polymerisation, a powdered polymethylmethacrylate-co-polymer that is soluble in the monomer or a mixture comprising polymethylmethacrylate-co-polymers, a polymerisation initiator, a radiopaquer, whereby the powdered polymethylmethacrylate-co-polymer comprises at least one particulate polymethylmethacrylate-co-polymer having a molar mass of more than or equal to 200,000 g/mol, and the polymethylmethacrylate-co-polymer can be obtained by polymerisation of a mixture of more than or equal to 90.0% by weight methylmethacrylate and less than or equal to 10.0% by weight of one or more comonomers, whereby the weight ratio of component A comprising polymethylmethacrylate-co-polymer, one radiopaquer, and one polymerisation initiator, in particular dibenzoylperoxide, and component B comprising a monomer for radical polymerisation, a stabiliser, and a polymerisation accelerator, in particular an aromatic amine, is approximately 2.0 to 3.4 to 1.0, for controlling the initial viscosity of the bone cement dough that is formed by mixing the above-mentioned components A and B.
