Instytut Wysokich Cisnien Polskiej Akademii Nauk

Aleksandra Kędzierska

Tadeusz Chudoba

Dariusz Smoleń

Aharon Gedanken

Wojciech Swięszkowski

Witold Lojkowski

Wojciech Święszkowski

Bartosz Woźniak

Jacek Wojnarowicz

Julia Rogowska-Tylman

Janis Locs

Vita Zalite

Mara Pilmane

Elżbieta Pietrzykowska

Krzysztof Kurzydłowski

Ilze Salma

Sylwia Kuśnieruk

Elzbieta Pietrzykowska

Witold Łojkowski

Wojciech Swieszkowski

Dariusz Smolen

Sylwia Kusnieruk

The method of making an implant consists on coating of a supporting structure () with synthetic hydroxyapatite by immersing the supporting structure () in a suspension () and triggering of a cavitation in a portion of the suspension () being in contact with the supporting structure (). The suspension () is formed by a liquid external phase, advantageously water, and internal phase, i.e. particles of synthetic hydroxyapatite having an average particle size not exceeding 100 nm and containing structural water in an amount from 2 to 6% by weight. The implant is coated with the above described hydroxyapatite subjected to cavitation and a thickness of 50 nm to 1000 nm, advantageously 50 nm to 300 nm.

Method for manufacturing bone implants and bone implant

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 m/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&#xb0; C. to 600&#xb0; 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.

Growing community of inventors

Kolonia Zawada, Poland

Aleksandra Kędzierska