Ceramic coated orthopaedic implants and method of making such implants

Orthopaedic implants with scratch-, wear- and corrosion-resistant ceramic coatings on metal substrates are provided, as well as methods for making such coatings. The metal substrate is advantageously HIP'd and homogenized prior to coating with the ceramic, and the HIP'd and homogenized met...

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Bibliographische Detailangaben
Hauptverfasser:	OVERHOLSER RONALD W, LANGHORN JASON B, SMITH BRYAN J
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL DISINFECTION, STERILISATION, OR DEODORISATION OF AIR HUMAN NECESSITIES HYGIENE INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	Orthopaedic implants with scratch-, wear- and corrosion-resistant ceramic coatings on metal substrates are provided, as well as methods for making such coatings. The metal substrate is advantageously HIP'd and homogenized prior to coating with the ceramic, and the HIP'd and homogenized metal substrate is preferably ground and polished prior to coating with the ceramic. The ceramic coating may include a band with multiple thin alternating layers of titanium nitride, titanium carbonitride or both titanium nitride and titanium carbonitride, and may include an alumina overcoat. The present coatings curtail the growth of microcracks that can otherwise result from surface cracks or scratches on coated substrates, and thereby provide improved wear characteristics, scratch resistance, and prevent the penetration of corrosive fluids to the substrate material.