| abstract |
The invention relates to a device for mixing a polymethyl methacrylate bone cement formed of two starting components (1, 2) and for storing the starting components (1, 2) of the bone cement, said device having a tubular cartridge (3, 4) with a cylindrical interior, wherein a powder (1) is contained as first starting component in a front part of the interior of the cartridge (3, 4) and a container (9) containing a monomer liquid (2) as second starting component is arranged in a rear part of the interior of the cartridge (3, 4), wherein a discharge piston (6) is arranged between the container (9) and the powder (1), and wherein a conveying piston (5) is arranged on the side of the container (9) opposite the discharge piston (6), wherein the discharge piston (6) and the conveying piston (5) are arranged in the interior of the cartridge (3, 4) movably in the longitudinal direction, wherein a conduit means (22) is provided, which connects the front part and the rear part of the interior of the cartridge (3, 4) to one another in a manner permeable for the monomer liquid (2) and for gases and which is impermeable for the powder (1). The invention also relates to methods for mixing the starting components (1, 2) and to a method for producing a prepacked PMMA cement cartridge system suitable for mixing and applying a PMMA bone cement dough (44). |