One aspect relates to a device to produce a bone cement paste from a monomer liquid and a cement powder as starting components of the bone cement paste, and to dispense the mixed bone cement paste. The device includes a cartridge with a cylindrical interior, a dispensing plunger movable towards the front of the cartridge; a receptacle extending along a longitudinal direction, a front of the receptacle connected with the rear of the cartridge; a pumping plunger arranged and in the receptacle movable towards the front of the receptacle; a breakable ampoule containing the monomer liquid, the ampoule with ampoule body arranged in the receptacle between the pumping plunger and the dispensing plunger with at least some sections of the ampoule body in contact with the receptacle; and a spacer arranged in the receptacle between the dispensing plunger and the ampoule body, the spacer extending in the longitudinal direction of the receptacle and the spacer being separated from the inner wall of the receptacle by a distance at least as large as the wall thickness of the ampoule body.

A vacuum mixing system for the mixing of polymethylmethacrylate bone cement comprising at least one cartridge (4) having an evacuatable internal space (5) for the mixing of the bone cement, the internal space (5) of which comprises a cylindrical swept volume, a mixing element (12) that is arranged in the internal space (5) of the cartridge (4) such as to be mobile and can be operated from outside the vacuum mixing system in order to mix the content in the internal space (5) of the cartridge (4), and a dispensing plunger (2) having a cylindrical external circumference whose first base surface borders a base surface of the internal space (5) of the cartridge (4) and which can be or is locked to the cartridge (4) in detachable manner and which, in the detached state, is mobile in the cylindrical region of the internal space (5) of the cartridge (4).

Devices and methods mix a bone cement and comprise at least one cartridge, wherein the cartridge comprises in its interior a cylindrical mixing chamber, a discharge piston movable in the cylindrical mixing chamber in the longitudinal direction and sealable against the walls of the mixing chamber, a mixing device for thoroughly mixing the content of the mixing chamber, which is arranged in the interior of the mixing chamber. The mixing device is operable externally via a mixing rod and the mixing rod is guided through a passage in the discharge piston such that it can be rotated and displaced in the longitudinal direction by the discharge piston. The cartridge comprises a discharge opening opposite the discharge piston, wherein, in the mixing chamber, a first component is contained between the discharge piston and the discharge opening, wherein a monomer fluid as a second component is introducable through the discharge opening into the mixing chamber. The device further comprises a locking element with which the mixing rod is affixable to the discharge piston such that the discharge piston is movable by means of the mixing rod in the mixing chamber in the longitudinal direction.

A device for mixing bone cement comprises a first hollow body which encloses a first cavity for receiving a powder and has a first opening, and a second hollow body which encloses a second cavity for receiving an ampoule and has a second opening. The first hollow body and the second hollow body are connectable to one another in such a way that the first opening and the second opening are fluidically connected to one another. The first hollow body is elastic so that a content of the first hollow body can be mixed from the outside by kneading.

A manual mixer serves to facilitate mixing and agitating materials for use during surgery. The manual mixer includes a mixing assembly and an actuation assembly for actuating the mixing assembly. The mixing assembly includes at least a paddle portion and a plunger portion. The plunger portion is simultaneously capable of rotational movement with the paddle portion and movement upwardly or downwardly along the paddle portion. Rotation of the paddle portion serves to facilitate mixing and agitating of the materials, and downward movement of the plunger portion serves to facilitate dispensing of the materials from the manual mixer.

A mixing element for a static mixer for installation into a tubular mixer housing has a longitudinal axis along which at least one first and one second installation body are arranged behind one another. An inlet element is provided which is arranged upstream of the first installation body, wherein the inlet element and the first installation body are connected to one another via a connection element. The inlet element has a body which can be sealingly taken up at the peripheral side in the mixer housing. The body has a first inlet passage and a second inlet passage, wherein the first inlet passage has a first entry opening and a first exit opening, wherein the second inlet passage has a second entry opening and a second exit opening so that the corresponding component can be conducted through the corresponding inlet passage.

A cartridge for mixing and injecting bone cement includes a body including a cylindrical member, a first coupler and a second coupler at a first open end and a second open end of the cylindrical member, respectively, a first opening/closing member detachably coupled with the first coupler, a second opening/closing member detachably coupled with the second coupler, and a mixing ball in an internal space of the body. A bone cement mixing and transferring system includes the cartridge having powder and liquid components of bone cement inserted and mixing the powder and liquid components, an injection tube coupled with the cartridge after removing the first opening/closing member from the cartridge, and a cement gun mounted to a rear side of the second opening/closing member, the cement gun applying pressure for injecting bone cement mixed in the cartridge into an area to be treated via the injection tube.

A storage and mixing system, for pasty two-component polymethyl methacrylate bone cements, comprises a cartridge with a cylindrical interior, a cartridge head that closes an end of said cartridge, a partition wall axially disposed in the cylindrical interior of the cartridge, wherein said partition wall is connected to the circumferential surface of the cylindrical interior of the cartridge and divides the cylindrical interior of the cartridge delimited by the cartridge head into two spatially separate cavities. The first cavity includes a first pasty cement component and the separate second cavity includes a second pasty cement component, two delivery plungers close the two cavities on the side of the cavities opposite the cartridge head. At least two cutting edges are disposed on the front side of the sleeve-shaped connecting means facing the cartridge head, such that the at least two cutting edges cut off the partition wall from the cylindrical inner wall of the cartridge as at least one cut-off strip when the delivery plungers are advanced towards the cartridge head in the cavities with the connecting means, and wherein the sleeve-shaped connecting means comprises a deflecting surface which is inclined to the axis of the connecting means which, on advancing the connecting means, presses the at least one cut-off strip of the partition wall towards the inner wall of the cartridge.

A storage and mixing system for pasty two-component polymethyl methacrylate bone cements comprises a tubular cartridge with a cylindrical interior, a cartridge head that closes one end of the tubular cartridge, a partition wall axially disposed in the cylindrical interior and dividing the cylindrical interior into two spatially separate cavities, the first cavity including a first pasty cement component and the second cavity including a second pasty cement component, two delivery plungers disposed movably in the two cavities and connected via a connecting means, wherein a wedge or cone having a cutting edge on the front side thereof facing the cartridge head is disposed on the connecting means, such that said cutting edge cuts open the partition wall when the delivery pistons are advanced towards the cartridge head and the wedge or cone presses the cut open parts of the partition wall towards the inner wall of the cartridge.

A manual mixer serves to facilitate mixing and agitating materials for use during surgery. For example, the manual mixer includes a body portion defining an interior area, a mixing assembly provided in the interior area of the body portion, a crank assembly for actuating the mixing assembly, and a valve assembly. The mixing assembly serves to mix and agitate the materials provided in the interior through rotation of a plunger portion and a spring attached thereto, and through upwards and downwards movement of the plunger portion in the interior area. Rotation of the crank assembly serves to rotate the plunger portion and the spring attached thereto, and effectuate upwards and downwards movement of the plunger portion. The valve assembly can be opened to facilitate dispensing of the materials from the interior area.