Method of Forming a Bioactive Coating
AssigneePlasma Coatings Limited
InventorAleksey Yerokhin
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Abstract
A method for the plasma electrolytic oxidation of a bioactive coating onto implant (4) is provided. The implant is placed in an electrolyte solution (3) providing Ca and P ions and then connected to a power supply (1). A counter electrode is also provided in the electrolyte solution. A sequence of voltage pulses having alternating polarity are then applied across the implant and counter electrode to deposit a bioactive coating onto the implant. A intra-bone implant formed by the method is also provided having a coating with a thickness of 10 to 30 microns, a porosity comprised by pores with sizes of 0.5 to 10 microns, and comprising 10 to 30 wt % of hydroxyapatites.
Claims22
A method for plasma electrolytic oxidation of a bioactive coating onto an implant, comprising:
- providing the implant to be coated in an electrolyte solution, said electrolyte solution for providing Ca and P ions;
- connecting said implant to a power supply;
- providing a counter electrode in said electrolyte solution;
- and
- applying a sequence of voltage pulses across said implant and counter electrode, said sequence of voltage pulses having alternating polarity.
An intra-bone implant comprising a substrate and a coating, said coating characterised by a thickness of 10-30 microns, a porosity comprised by pores with sizes of 0.5-10 microns, and comprising 10-30 wt % of hydroxyapatites.
An aqueous electrolyte solution for use in the formation of a bioactive coating, said solution comprising 0.05-0.2 mol of calcium acetate and 0.025-0.1 mol of tri-sodium orthophosphate per litre of water.
22-24. (canceled)
Dependencies are inferred from the claim text.