Patent ID: 9675459
Date: 2017-06-13
CPC Classifications: A61F,A61L,C04B

Claim:
1. A bone implant consisting of pure, single-phase, nanostructural hydroxyapatite (HAp), characterized in that its density, determined by helium method, is not less than 75% of the theoretical density, the average grain size of the material forming the implant, determined on the basis of the PN-EN standard, is not larger than 50 nm, the nanohardness of this material, measured by Berkovich indenter using a load of 4 mN, is not less than 3 GPa, and its solubility, determined according to ISO 10993-4 norm, is from 5 to 35 mg/dm 3 , wherein said bone implant is manufactured using a nanopowder of synthetic hydroxyapatite (HAp) having a hexagonal structure, an average grain size in a range from 3 nm to 30 nm, and a specific surface area greater than 200 m wherein said bone implant is manufactured by a method comprising a step of shape formation of said nanopowder of synthetic hydroxyapatite (HAp) into a desired geometric shape, and subsequently a step of fixing the formed shape, wherein in the step of shape formation, the nanopowder of synthetic hydroxyapatite (HAp) is dried at a temperature not exceeding 300° C. for at least one minute and then the dried nanopowder is pressed in a mold into a desired geometric shape at a pressure in the range from 50 MPa to 2 GPa, and wherein in the step of fixing, the pressed nanopowder is at room temperature and is subjected to a pressure rising from the ambient value to a peak value selected from a range from 1 GPa to 8 GPa and to a temperature chosen from a range of 100° C. to 600° C. for a period of time selected from a range from 30 seconds to 5 minutes.