METHOD FOR MANUFACTURING BONE IMPLANTS AND BONE IMPLANT

摘要

To manufacture the implant a nanopowder of synthetic hydroxyapatite (Hap) is used having a hexagonal structure, average grain size in a range from 3 to 30 nm and the specific surface area greater than 200 m2/g. First the nanopowder is formed to the desired geometric shape, and then the shape is fixed. In the step of shape information the dried nanopowder is pressed in the mold under the pressure ranging from 50 Mpa to 2 GPa. In the step of fixing the pressed nanopowder at room temperature is subjected to the pressure rising from the ambient value to the peak value selected from a range of 1 to 8 GPa and to a temperature selected from a range of 100° C. to 600° C. for a period of time selected from a range from 30 seconds to 5 minutes. The density of thus produced implant, determined by helium method, is not less than 75% of the theoretical density.

主权项

1. A method for manufacturing bone implants using hydroxyapatite (HAp),
comprising a step of formation of HAp powder into a desired geometric shape, and a step of fixing the formed shape, characterized in that for the implant manufacturing a powdered synthetic hydroxyapatite is used having hexagonal structure, average grain size in a range from 3 to 30 nm and specific surface area greater than 200 m2/g, wherein during the step of formation the nanopowder is dried at a temperature not exceeding 300° C. for at least one minute and then the drained nanopowder is compressed in a mold of desired geometric shape at a pressure ranging from 50 MPa to 2 GPa, while in the step of fixing the pressed nanopowder at a room temperature is subjected to a pressure rising from the ambient value to the peak value selected from a range from 1 to 8 GPa and to a temperature selected from a range of 100° C. to 600° C. for a period selected from a range of 30 seconds to 5 minutes.