Device and method for preparing bone cement paste

A device for preparing a bone cement paste from two starting components, comprising:

• a mixing unit comprising a hollow cylindrical cartridge with an interior, wherein a bone cement powder as a first starting component is stored in the interior, and a cartridge head which seals the interior in terms of fluid conduction at a proximal cartridge end, and
• a reservoir for a monomer liquid as a second starting component, comprising a conduit connecting the interior of the mixing unit to the reservoir in terms of fluid conduction, wherein the conduit extends through a cartridge head duct of the cartridge head of the mixing unit, and the conduit and the cartridge head duct form a first form closure,
• wherein
• the reservoir comprises a reservoir container, in which at least one closed, in terms of fluid conduction, ampoule with an ampoule body and an ampoule head is arranged and the monomer liquid is stored in the ampoule, and a cavity in the region of the ampoule head,
• wherein the cavity is connected to the conduit in terms of fluid conduction and comprises a connection to the ampoule, wherein the ampoule head is arranged at least in regions within the connection, and the reservoir container comprises a deformable region at least in portions so that tilting of the ampoule about a pivot point against the connection is enabled,
• wherein the connection has a connection diameter which is adapted to the dimensions of the ampoule head such that the ampoule head can be opened, in terms of fluid conduction, when the ampoule is tilted about the pivot point against the connection, and
• wherein the reservoir comprises a connecting element to connect the reservoir to the mixing unit via a second form closure.