Electrolytic deposition of coatings for prosthetic metals and alloys
AssigneeBoard of Regents of the University of Nebraska
InventorJody G. Redepenning
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Abstract
An article coated with an electrolytically deposited bio-compatible composite layer useful as an internal prosthetic device is disclosed. The bio-compatible composite coating that is electrolytically deposited onto the article comprises hydroxyapatite and chitosan. The introduction of chitosan into the crystal matrix of brushite/hydroxyapatite significantly improves the adhesive and chemical and mechanical stability properties of the coating.
Claims16
An article comprising a substrate, the substrate having deposited thereon a second coating, said second coating comprising a mixture of a calcium phosphate compound and chitosan and said second coating having been deposited electrolytically on said substrate, wherein said substrate is the cathode in said electrolytic deposition;
- wherein the substrate is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, tin, cobalt, aluminum, chromium, molybdenum, tungsten, titanium vanadium aluminum alloys, cobalt chromium molybdenum alloys, and combinations thereof;
- and
- wherein the substrate is coated with a first coating selected from the group consisting of carbon and nitride prior to said electrolytic deposition.
An article comprising a substrate, the substrate having deposited thereon a second coating, said second coating comprising a mixture of hydroxyapatite and chitosan and said second coating having been deposited electrolytically on said substrate, wherein said substrate is the cathode in said electrolytic deposition;
- wherein the substrate is selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, tin, cobalt, aluminum, chromium, molybdenum, tungsten, titanium vanadium aluminum alloys, cobalt chromium molybdenum alloys, and combinations thereof;
- and
- wherein the substrate is coated with a first coating selected from the group consisting of carbon and nitride prior to said electrolytic deposition.
Dependencies are inferred from the claim text.