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US 4,671,263 AGranted
Device and process for mixing and applying bone cement
OwnerKlaus Draenertinventor
Life of this patent
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Abstract
The invention relates to a device and process for mixing and applying bone cement. The device comprises a sealable container (8) wherein the bone cement, prior to its application, is prepressurized at an adjustable pressure and from which it is subsequently applied at a controllable pressure. The device and the process of the invention allow bubble formation in the bone cement to be suppressed and to achieve the desired stratification of the bone cement around the prosthesis during application.
Claims19
A device for mixing and applying bone cement, comprising
- a cylindrical container (8) to receive the bone cement prior to its application,
- an ejector means (6;
- 82) which is movable within the container (8) and fits cement-tight in said container (8),
- a removable closure cap (10;
- 58) whereby the container (8) can be closed tightly at its distal end,
- a pressure generating unit (42;
- 86) for prepressurizing the bone cement in the container (8) at an adjustable pressure and for applying the bone cement at controllable pressure, and
- vent means for letting the air above the bone cement escape while the ejector means (6;
- 82) moves in the container (8) in the forward direction.
6 more elements
A process for mixing and applying bone cement comprising the steps of:
- partially mixing bone cement powder and a liquid monomer to prepare the bone cement, filling the bone cement into a container, prepressurizing the bone cement in the container without air inclusion under a pressure sufficient to further mix the bone cement, decompressing the bone cement and applying the bone cement at a lower, precisely controllable pressure.
Dependencies are inferred from the claim text.