Method of surface oxidizing zirconium and zirconium alloys and resulting product

A technology of zirconium alloy and zirconia, applied in metal material coating process, shoulder joint, prosthesis, etc., can solve problems such as reducing integrity

Inactive Publication Date: 2004-12-08
SMITH & NEPHEW INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The resulting oxide coating is not always uniform in thickness, and this non-uniformity reduces the integrity of the bond between the zirconium alloy and the oxide layer, as well as the integrity of the bond within the oxide layer

Method used

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  • Method of surface oxidizing zirconium and zirconium alloys and resulting product
  • Method of surface oxidizing zirconium and zirconium alloys and resulting product
  • Method of surface oxidizing zirconium and zirconium alloys and resulting product

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Embodiment Construction

[0039] One aspect of the present invention is to provide a method for forming an oxide coating of uniform thickness on zirconium or zirconium alloys each having a single-phase crystal structure and uniform composition, and modified surface roughness Spend. Another aspect of the present invention is to provide a low friction, wear resistant uniform thickness on prosthetic surfaces such as articulating surfaces and irregular surface structures adapted to accommodate tissue ingrowth on a portion of the prosthetic body oxide coating.

[0040] Before oxidizing zirconia or zirconium alloys, the subject matter of the method of forming oxide coatings of uniform thickness can be applied to various Prosthetic components and devices. These prosthetic components and devices include, but are not limited to, cardiovascular implants, including heart valves, whole artificial heart implants, ventricular assist devices, vascular grafts, and endovascular supports; electrical signal-carrying de...

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Abstract

A coating of blue-black oxidized zirconium of uniform and controlled thickness on a zirconium or zirconium alloy material is accomplished through the use of a single phase crystalline material substrate having an altered surface roughness. An oxidized zirconium coating of uniform and controlled thickness is especially useful on orthopedic implants of zirconium or zirconium-based alloys to provide low friction, highly wear resistant surfaces on artificial joints, such as, but not limited to, hip joints, knee joints, shoulders, elbows, and spinal implants. The uniformly thick oxidized zirconium surface of controlled depth on prostheses provide a barrier against implant corrosion caused by ionization of the metal prostheses. The invention is also useful in non-articulating implant devices such as bone plates, bone screws, etc.

Description

Background of the invention [0001] This application claims priority to US Application Serial No. 09 / 909,612, filed July 20,2001. [0002] The present invention relates to metal implant devices having a load bearing surface coated with a thin, dense, low friction, highly wear resistant, uniform thickness zirconia coating. [0003] The present invention also relates to a uniform thickness of zirconia coatings on non-load bearing surfaces of orthopedic implant devices, wherein the zirconia provides a barrier between the metal prosthesis and human tissue, thereby preventing the release of metal ions and implanting the device of corrosion. [0004] The present invention also relates to a method of producing an oxide coating of uniform thickness on zirconium or zirconium alloys by controlling the surface roughness of zirconium or zirconium alloys having a single-phase crystal structure and uniform composition prior to formation of the oxide coating . [0005] The excellent corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/00A61F2/00A61F2/28A61F2/30A61F2/32A61F2/34A61F2/36A61F2/38A61F2/40A61F2/42A61F2/44A61L27/04A61L27/30C23C8/02C23C8/10C23C8/12
CPCA61F2002/30878A61F2250/0026A61F2/38A61F2/3662A61F2/36A61F2/389A61F2/4241A61L27/306A61F2002/365A61F2002/30909A61L27/047A61F2/34A61F2/30767A61F2002/30892C23C8/10A61F2310/00089A61F2/367A61F2002/30322A61F2/32A61F2/40A61F2002/3611A61F2002/30838A61F2/3094C23C8/02A61F2/44A61F2002/3625A61F2310/00634A61F2002/30332A61F2220/0033A61F2/3859A61F2/2803
Inventor G·亨特C·M·阿斯吉安G·L·希内斯
Owner SMITH & NEPHEW INC
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