The applicator (1) has a cylinder (3) for bone cement with a piston (5) sliding longitudinally in a screwing motion in the cylinder, to push the cement through an exit opening (8) under high pressure. The applicator can be adjusted to slide the piston with a screwing motion or to slide the piston longitudinally without any screwing motion. The piston has an engagement section (10) with a screw thread that engages a toothed rack, so that rotating the engagement section slides the piston. An independent claim is included for a cannula for the applicator.
