Back to results
US 4,721,390 AGranted
Method for producing bone cement for fixing prostheses and device for carrying out said method
AssigneeMit
InventorLars A. A. Lidgren
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMit
InventorLars A. A. Lidgren
Estimating the term…
The present invention relates to a method for producing bone cement for fixing protheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix prostheses at surrounding bone tissue. In order to prevent large amounts of air from being stirring into the mixture, mixing of said various substances occurs under vacuum. The invention also relates to a device for carrying out the method for producing bone cement for fixing prostheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix protheses at surrounding bone tissue, and whereby the mixture is applied to the bone tissue by means of a feed device (20) from which the mixture (19) may be pressed out. In order to avoid transfer of the mixture from a special mixing container to the feed device, the present device comprises an agitator (8) which is connectable to the feed device (20) and a vacuum source (17) which is connectable to the feed device for mixing said substances in said feed device under vacuum.
Method for producing bone cement for fixing prostheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix prostheses at surrounding bone tissue, characterized by mixing said various substances under vacuum of 0.05-0.5 bar absolute pressure and at temperatures within the range of 0.degree.-21.degree. C. in a mixing space (2) intended for the mixture in order to minimize addition of air into the mixture.
Method for producing bone cement for fixing prostheses, whereby the bone cement is manufactured by mixing various substances with each other to provide a setting mass which in set condition is adapted to fix prostheses at surrounding bone tissue, and whereby the various substances are mixed under vacuum in a feed device (20) and the mixture is applied to the bone tissue by pressing out said mixture by means of a piston (23), characterized by generating generally equal vacuums inside the feed device (20) and in a space (35) outside the piston (23).
A method for producing bone cement, comprising the steps:
A device for producing bone cement, comprising:
Dependencies are inferred from the claim text.