POWDER BLAST APPARATUS

A powder-blasting device for cleaning the surfaces of teeth via application with a powder-gas mixture, including a stationary unit having a connection region for a mixing chamber for producing the powder-gas mixture, a hand part having a nozzle device for blasting the powder-gas mixture onto a surface of a tooth, and a joining unit for joining the hand part to the stationary unit wherein the joining unit has at least one joining guide between the stationary unit and the hand part, and wherein a tube section that can be blocked via elastic deformation is arranged in a powder-gas line between the mixing chamber and the nozzle device, wherein the joining unit is detachably joined to the stationary unit and the lockable tube section is arranged in the detachable joining unit.