The invention relates to a bone cement applicator for mixing and applying abonecement, with which the starting components (1, 2) of the bone cement ismixable in aclosed cartridge (3, 4) to form a bone cement dough (44), wherein thecartridge (3, 4)has a multi-part closure system comprising a discharge opening, wherein atleast twoparts (7, 8) of the closure system are movable relative to one another, drivenby amovement of the mixed bone cement dough (44), and the discharge opening isopenedthe movement of the at least two parts (7, 8) of the closure system relativeto oneanother, and wherein the movement of the mixed bone cement dough (44) isdrivableby a pressure on the bone cement dough (44).The invention also relates to methods for mixing the starting components (1,2).
