Storage and mixing systems for pasty two-component polymethyl methacrylate bone cements comprise a tubular cartridge having a cylindrical inner chamber, a cartridge head, which closes one end of the tubular cartridge at the front side, a partition that is disposed axially in the cylindrical inner chamber of the cartridge. The partition divides the cylindrical inner chamber of the cartridge bounded by the cartridge head into two cavities that are spatially separated from one another, wherein a first pasty cement component is present in the first cavity and a second pasty cement component is present in the separate second cavity. The systems further comprising two dispensing plungers axially displaceable in the two cavities of the cartridge, wherein the dispensing plungers close the two cavities on the back side of the cavities situated opposite the cartridge head, a bending device for deforming the partition, wherein the bending device is axially movable in the cartridge and is disposed, or is to be disposed, behind the dispensing plungers, as seen from the cartridge head, wherein the bending device has a deflection surface that is inclined with respect to the axis of the cartridge and pushes the partition laterally in the direction of the inside wall of the cartridge when the bending device is pushed into the cartridge.

An apparatus and method for mixing and dispensing bone cement is provided. The apparatus includes a mixing vessel for mixing bone cement attached to a syringe body. The syringe body having a lumen that is connected to the mixing vessel by a passageway between the mixing vessel and the lumen of the syringe body. A separator is provided between the mixing vessel and the syringe body and includes an orifice therein so that when the opening in the separator is misaligned with the lumen the passageway is blocked and when aligned the passageway is continuous with the lumen so that bone cement can pass into the syringe body. A plunger is provided and is slideably movable along the longitudinal axis of the syringe body so as to advance the bone cement out of the distal end of the syringe.

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.

The invention relates to the field of dentistry and is used for reinforcing composite materials to eliminate various defects of dental hard tissues of carious and non-carious origin in the process of direct/indirect and reinforced/non-reinforced composite restorations. The claimed method includes vibrational mechanical activation of composite materials by vibrationally acting upon portions of composite material shaped by manual mechanical activation (e.g., roll/ball) and applied layer-by-layer to the region of a defect. A device for vibrational mechanical activation of a composite material includes at least one working portion for applying a composite material to the region of a defect, the working portion fixedly attached to a handle, which is connected by a framework to a micromotor that creates vibrations which are transferred via the working portion to a layer of composite material by distributing the same across the entire surface of the defect and achieving the simultaneous surface plastic deformation thereof.

A storage and mixing system for pasty two-component polymethyl methacrylate bone cements comprises a tubular cartridge having a cylindrical inner chamber, a dispensing plunger that is axially displaceable in the inner chamber of the cartridge, a partition disposed axially in the tubular cartridge, and a cartridge head which closes one end of the tubular cartridge. The cartridge head has a slot-shaped opening, wherein the partition protrudes from the inner chamber of the cartridge through the slot-shaped opening of the cartridge head, wherein the partition divides the cylindrical inner chamber of the cartridge bounded by the dispensing plunger and the cartridge head into two cavities that are spatially separated from one another. A first pasty cement component is present in the first cavity and a second pasty cement component is present in the separate second cavity, wherein the partition is removable through the slot-shaped opening of the cartridge head so that the two separate cavities are connected to one another after the partition is removed.

A fluid pressurizing and displacement device which is configured for both macro movement and micro movement of a plunger. In order to execute micro movement of the plunger, a user need only rotate the plunger; to execute macro movement of the plunger, a user need only push or pull the plunger. This simplicity in use is possible because a half-nut (or other suitable structure within the device) remains engaged with the plunger, except when the plunger is being pushed or pulled by its operator. All user motions are simple and intuitive.

Medical devices for injecting materials into patients are disclosed. The devices can include a body having a handle and a lever. The devices can also include a delivery tube comprising a passageway along a longitudinal axis and a nozzle with an opening, the delivery tube configured to couple with a distal end of the body. A driving rod can be inserted into the body and extend into the passageway, such that the lever can move the driving rod distally when the lever is actuated toward the handle. Methods of using the material delivery device are also disclosed.

The invention provides a bone cement mixing assembly including a mixer, a syringe barrel and a movable plug cover. The mixer includes a stirring rod and a stirring barrel. The stirring rod has holding end, a rod body and a stirring end. The stirring barrel has a barrel cover, a first barrel open, a first barrel body, a first barrel bottom, and a stirring space located in the first barrel body. The syringe barrel has a second barrel open, a second barrel body, a second barrel bottom, and an injection space located in the second barrel body. In this way, the complete-stirred bone cement in the stirring barrel can be directly collected and pushed into the syringe barrel through the movement of the movable plug cover to achieve the effect of completing the preparation of the bone cement quickly and efficiently.

A bone fragment and osteomedullary tissue harvesting system that includes a harvesting device, a collection vessel and tubing. The harvesting device includes a needle portion and a handle portion. The needle portion that has a needle bore that extends through at least part of the needle portion. The handle portion is operably attached to the needle portion. The handle portion includes a connection port and a vacuum control mechanism that are in communication with a handle bore that extends through the handle portion. The needle bore is in communication with the handle bore. The vacuum control mechanism includes a vacuum aperture that extends through a surface of the handle portion and is in communication with the handle bore. The collection vessel is capable of receiving aspirated bone fragments and tissue. The tubing operably connects the connection port and the collection vessel.