Abstract: The device for spraying on a dental impression compound consists of a cylindrical handpiece (1) with a cartridge (5), situated inside it, for the provision of the impression compound, a curved and conically tapering headpiece (3), which can be mounted on the handpiece (1) by means of a bayonet joint or screw joint (2) and has a likewise conically tapering tubular cross-section (4), and a spray nozzle which is arranged on the headpiece (3) and designed as a two-phase nozzle (9, 10, 14). The supply of the impression compound to the spray nozzle takes place by means of an elastic hosepiece (7), at the front (distal) end of which a conical or pyramidal nozzle member (9) is arranged, which has air escape openings (11). At the same time the diameter of the nozzle member (9) must be greater than the smallest diameter of the conical tubular cross-section (4).

Abstract: An injection spray gun with a holder comprising: a sheathing adapted to receive a cylindrical ampule; a handle fastened to the gun; an actuating lever pivotally attached to the handle; a plunger guided in the holder and connected with the actuating lever; a piston located in the cylindrical ampule wherein movement of the plunger causes forward thrust of the piston; and a pressure limiting device being provided for acting on at least one of the actuating lever and/or the plunger.