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AssigneeLaboratorium fur experimentelle Chirurgie Forschungsinstitut
InventorSlobodan Tepic
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A method of preparing a self-curing two-component cement, which is particularly useful for the preparation of bone cement used in orthopedics, from a powder component and a liquid component. The method includes providing the powder component in a first at least partially evacuated inflexible container, providing the liquid component in a second inflexible container, and adding the liquid component to the evacuated powder component, such that the liquid floods the evacuated interspaces between the powder particles. An apparatus for carrying out this process is a syringe with a slidable piston, the syringe being sealed at its dispensing end by a removable plug. Preferably, the syringe is fitted with an axially collapsible spiral mixing device, one end of which is an elongated shaft which extends through the removable plug at the dispensing end. The elongated shaft can be rotated to homogenize the contents of the syringe, but during dispensing the mixing device collapses as the piston advances.
A method of preparing a self-curing cement from a powder component containing a polymerization catalyst and a liquid component containing a polymerizable monomer, comonomer, prepolymer or mixtures thereof, said method comprising:
The method of claim 15 further comprising mechanically mixing said polymerizable cement mass, said mechanical mixing step comprising:
The method of claim 14 wherein said pressurizing comprises opening said second inflexible container to atmospheric pressure, and wherein said propelling is effected by the force of said atmospheric pressure.
Dependencies are inferred from the claim text.