Bone cement applicator with retractable mixing rod and method for production of a bone cement

A bone cement applicator for storage and mixing of a bone cement powder and a monomer liquid as well as for applying a pasty bone cement mixed together from the bone cement powder and the monomer liquid, the bone cement applicator comprising:

• a cartridge defining a cylindrical internal space with a cylinder axis in which the bone cement is mixed, the cartridge having a front side, a cartridge head located on the front side with a dispensing opening for expulsion of the bone cement from the internal space, a rear side situated opposite from the front side, and a thread on the rear side;
• a dispensing plunger for expelling the mixed bone cement from the internal space through the dispensing opening, the dispensing plunger having a feedthrough and a rear side that faces away from the cartridge head, whereby the bone cement powder is contained between the dispensing plunger and the cartridge head in the internal space of the cartridge;
• a threaded tube having a rear side that is opposite from the dispensing plunger and being arranged at the rear side of the dispensing plunger, the threaded tube having a counter thread that matches and engages the thread on the rear side of the cartridge and projecting out of the cartridge on the rear side of the cartridge, whereby the dispensing plunger is mobile in the internal space of the cartridge along the cylinder axis of the internal space in the direction of the cartridge head by screwing the threaded tube into or onto the cartridge;
• a receptacle defining an inside, having a front side that faces the dispensing plunger, and being both plugged into the threaded tube on the rear side of the threaded tube and mobile in the threaded tube;
• a monomer liquid container arranged on the inside of the receptacle and configured to be opened on the inside of the receptacle, the monomer liquid container containing the monomer liquid;
• and
• a mixing rod detachably connected to the receptacle, having a first side that faces the cartridge head and to which a mixer is fastened and a second side opposite from the first side and to which the front side of the receptacle is connected, and being arranged in the internal space of the cartridge, the mixing rod configured to be guided through the feedthrough in the dispensing plunger and to be axially mobile in the feedthrough, such that the mixing rod and the mixer can be moved in the internal space of the cartridge for mixing the bone cement powder with the monomer liquid by a motion of the receptacle against the cartridge, wherein, when the mixing rod is detached from the receptacle and the receptacle is propelled in the direction of the cartridge head the mixing rod can be pushed into the receptacle.