BONE CEMENT APPLICATOR WITH RETRACTABLE MIXING ROD AND METHOD FOR PRODUCING A BONE CEMENT

摘要

The invention relates to a bone cement applicator comprising a cartridge (1) with an interior (11), the cartridge (1) having a cartridge head (6) on the front with a discharge opening for expelling the bone cement (48) from the interior (11) and wherein the cartridge (1) has a thread (8) on a rear side opposite the front of the cartridge (1), a discharge plunger (12), the bone cement powder (4) between the discharge plunger (12) and the cartridge head (6) in the Interior (11) of the cartridge (1) is included, a threaded tube (9) which is arranged on the rear side of the discharge plunger (12) facing away from the cartridge head (6), the threaded tube (9) being connected to the thread (8) has a mating thread (45) on the back of the cartridge (1) and the mating thread (45) of the threaded tube (9) engages in the thread (8) on the back of the cartridge (1) and the discharge piston (12) is screwed down threaded pipe s (9) in or on the cartridge (1) in the interior (11) of the cartridge (1) along the cylinder axis of the interior (11) in the direction of the cartridge head (6) is movably arranged, a receptacle (2), the receptacle (2) on a rear side of the threaded tube (9) opposite the discharge plunger (12) in the threaded tube (9) and is movable in the threaded tube (9), and a mixing rod (7), the mixing rod (7) having one attached to it attached mixer (10) is arranged in the interior (11) of the cartridge (1), the mixing rod (7) being connected on a side opposite the mixer (10) to a front side of the receptacle (2) facing the discharge piston (12) , wherein the mixing rod (7) is guided through a bushing in the discharge piston (12) and is axially movably mounted in the bushing, and wherein the mixing rod (7) is detachably connected to the receptacle (2) and that of the receptacle (2 ) loosened mixing rod (7) when driving the holder (2) in R The cartridge head (6) can be pressed into the receptacle (2). The invention also relates to a method for producing a bone cement with such a bone cement applicator.