Patent EP0573694A2 successfully refreshed from Google Patents.
EP0573694A2
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EP
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Prothesis with biologically inert wear resistant surface
Assignee: Individual
•
Filing: 1992-09-17
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Granted: —
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Expires: 2012-09-17
Abstract
Abstract A prosthesis is provided having at least a smooth non-articulating load bearing surface disposed adjacent a bone. The prosthesis includes a substrate formed from a metallic alloy. At least the regions of the substrate defining the load bearing surface are coated with a biologically inert abrasion resistant material harder than the substrate for preventing leaching of ions from the substrate into adjacent body tissue and for preventing wear. The coating may be titanium nitride or zirconium or other such material exhibiting biological inertness and acceptable hardness. The coating preferably defines a thickness of 8-10 microns.
Inventors
- 👤 Michael J. Pappas
- 👤 Frederick F. Buechel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/30767; A61F2/3601; A61F2/3603; A61L; A61L27/00; A61L27/02; A61L27/04; A61L27/06; A61L27/28; A61L27/30; A61L27/303; A61L27/306; A61F2/3662; A61F2/367; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30016; A61F2002/3006; A61F2002/30084; A61F2002/30107; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30316; A61F2002/30317; A61F2002/30322; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30667; A61F2002/30682; A61F2002/30685; A61F2/30771; A61F2002/30836; A61F2002/30878; A61F2/30907; A61F2002/30909; A61F2002/30922; A61F2002/30929; A61F2002/30934; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2002/365; A61F2210/00; A61F2210/0009; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2250/00; A61F2250/0014; A61F2250/0019; A61F2250/0026; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00413; A61F2310/00419; A61F2310/00485; A61F2310/00574; A61F2310/0058; A61F2310/00592; A61F2310/00598; A61F2310/00604; A61F2310/00634; A61F2310/0067; A61F2310/00682; A61F2310/0073; A61F2310/00748; A61F2310/00856; A61F2310/0088
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
99 words
An orthopedic prosthesis (10; 40) formed from a metallic alloy and having at least one load bearing surface (12, 17, 22; 42, 48, 58) moveably disposed adjacent to an opposed surface, said prosthesis (10; 40) comprising a substrate (20) formed from at least one selected metallic alloy and an abrasion resistant, biologically inert coating (26; 66) formed from a ceramic material harder than the substrate (20), said coating (26; 66) being applied to the substrate (20) on portions of the prosthesis defining the load bearing surface (12, 17, 22; 42, 48, 58) and defining a thickness of 5-15 microns.
Claim 2
Dependent Claim
19 words
An orthopedic prosthesis as in claim 1, wherein the coating (26; 66) defines a thickness of approximately 8-10 microns.
Claim 3
Dependent Claim
18 words
An orthopedic prosthesis as in claim 1 or 2, wherein the coating (26; 66) defines a crystalline structure.
Claim 4
Dependent Claim
42 words
An orthopedic prosthesis as in any of claims 1-3, wherein at least a portion (12, 14, 16, 17) of the substrate (20) is formed from a titanium alloy, and wherein the coating (26; 66) is formed from a ceramic comprising titanium nitride.
Claim 5
Dependent Claim
73 words
An orthodopedic prosthesis as in claim 4, wherein at least a portion (18) of the prosthesis is formed from a cobalt-chromium alloy, the portion (18) of the prosthesis (10) comprising the cobalt-chromium alloy being engaged with a portion (17) of the prosthesis (10) having the titanium alloy substrate (20) with the coating (26) thereon, the portion (18) of the prosthesis (10) formed from the cobalt-chromium alloy is not coated with the ceramic material.
Claim 6
Dependent Claim
35 words
An orthopedic prosthesis as in any of claims 1-5, wherein the load bearing surface comprises a non-articulating substantially smooth load bearing surface (12; 58) disposed for load bearing micromovement adjacent to a bone (13; 46).
Claim 7
Dependent Claim
29 words
An orthopedic prosthesis as in claim 6, wherein the load bearing surface comprises an articulating surface (18; 42) disposed for load bearing articulation with respect to another prostetic component.
Claim 8
Dependent Claim
89 words
A prosthetic device as in claim 7, wherein the prosthetic device (10) comprises a first component (12, 14, 16, 17) having the smooth load bearing surface thereon and a second component (18) having the smooth articulating surface thereon, the first and second components (12, 14, 16, 17, 18) having engagement surfaces (17, 19) defining an interface therebetween, said first component (12, 14, 16, 17) having the coating on the engagement surface (17), the second component (18) being substantially free of the coating (26) on the engagement surface (19) thereof.
Claim 9
Dependent Claim
52 words
An orthopedic prosthesis as in claim 8, wherein the substrate (20) comprises at least one bone ingrowth surface area (22, 24; 48) having a non-smooth surface configuration for increasing surface area and promoting bone ingrowth, said coating (26) being applied to the bone ingrowth surface area (22, 24; 48) of the substrate.
Claim 10
Dependent Claim
102 words
A prosthetic device as in claim 9, wherein the prostethic device is a femoral stem-type prosthetic device (10) having a stem (12) defining a portion of the prosthetic device (10) having said bone ingrowth surface area (22), a neck (16) extending from said stem (12) and a head (18) having a cavity (19) therein engaging a proximal portion (17) of said neck (16), the head (18) comprising the articulating surface of the prosthetic device (10), the proximal portion (17) of the neck (16), having the coating (26) thereon and the cavity (19) in the head (18) being substantially free of the coating.
Claim 11
Independent Claim
92 words
A method for making an orthopedic prosthesis (10; 40), said prosthesis (10; 40) comprising at least one load bearing surface area (12, 17, 22; 42, 48, 58) disposed for movement relative to another surface, said method comprising the steps of: providing a substrate (20) formed from a titanium alloy; ionically bonding a ceramic coating (26; 66) to at least the load bearing surface (12, 17, 22; 42, 48, 58) to define a thickness thereon of between 5-15 microns; and polishing the ceramic coating (26; 66) to a smoothness of approximately 1.0 microinch.
Claim 12
Dependent Claim
22 words
A method as in claim 11, wherein the ceramic coating (26; 66) is applied to define a thickness of approximately 8-10 microns.
Claim 13
Dependent Claim
20 words
A method as in claim 11 or 12, wherein the coating (26; 66) is formed from a ceramic comprising titanium.
Claim 14
Independent Claim
63 words
A method as in any of claims 11-13 further comprising the step of applying to selected portions (22; 48) of the substrate (20) a porous coating for promoting bone ingrowth, and wherein the step of ionically bonding the ceramic coating (26; 66) includes applying the ceramic coating (26; 66) to areas (22; 48) of the prosthesis (10; 40) having the porous material thereon.
References Cited (Backward Citations)
No citation records indexed.
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