US4818559A
Expired / Lapsed
US
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Method for producing endosseous implants
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-07-29
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Granted: 1989-04-04
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Expires: 2006-07-29
Abstract
Abstract An improved method for producing endosseous implants by thermally spraying a ceramic material onto the surface of a metallic core material having a rough surface, i.e. a maximum surface roughness of 15 to 100 μm, which can produce implants which have excellent characteristics in regard to the metallic material and ceramic material and do not dissolve out harmful metal ions. The endosseous implants are useful for implantation in various bones including tooth roots and joints in living bodies.
Inventors
- 👤 Masaaki Hama
- 👤 Keiichirou Watanabe
- 👤 Hiroshi Ishimaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; A; A61; A61C; A61C8/00; A61C8/0012; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61L27/32; B22F3/00; B22F3/001; C; C23; C23C; C23C4/00; C23C4/02; C23C4/04; C23C4/10; C23C4/11; A61C8/0013; A61F2/3094; A61F2002/30906; A61F2310/00; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00592; A61F2310/00598; A61F2310/00604; A61F2310/00796; A61L2430/00; A61L2430/02; Y; Y10; Y10S; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A method for producing an endosseous implant which comprises: thermally spraying titanium hydride onto a surface of a metallic core material to make the surface of the metallic core material rough to a maximum surface roughness of 15 to 100 μm; and then thermally spraying a ceramic material onto the roughened surface.
Claim 2
Independent Claim
52 words
A method for producing an endosseous implant which comprises: thermally spraying titanium hydride onto a surface of a metallic core material to make the surface of the metallic core material rough to a maximum surface roughness of 15 to 100 μm; and then thermally spraying a ceramic material onto the roughened surface.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein the metallic core material is selected from the group consisting of cobalt-chromium alloys, stainless steel, titanium, titanium alloys, tantalum and zirconium.
Claim 4
Dependent Claim
39 words
The method according to claim 1, wherein the surface of the metallic core material is made rough by subjecting the core material to blasting or etching with an acid and then thermally spraying titanium hydride onto the surface thereof.
Claim 5
Dependent Claim
21 words
The method according to claim 1, wherein the metallic core material has a maximum surface roughness of 20 to 60 μm.
Claim 6
Dependent Claim
16 words
The method according to claim 1, wherein the ceramic material for thermal spray coating comprises hydroxyapatite.
Claim 7
Dependent Claim
22 words
The method according to claim 1, wherein the ceramic material for thermal spray coating comprises a mixture of hydroxyapatite and aluminum oxide.
Claim 8
Independent Claim
116 words
A method for producing an endosseous implant which comprises: blasting a surface of a metallic core material selected from the group consisting of titanium and a titanium alloy; thermally spraying titanium hydride having a particle size of 10 to 100 μm onto the surface of the blasted metallic core material to make the surface of the core material rough to a maximum surface roughness of 15 to 100 μm; and thermally spraying a ceramic material selected from the group consisting of alumina, hydroxyapatite and a mixture of alumina and hydroxyapatite onto the surface of the resulting core material, thereby forming a layer of the ceramic material of 10 to 200 μm in thickness on the surface.
Claim 9
Independent Claim
116 words
A method for producing an endosseous implant which comprises: blasting a surface of a metallic core material selected from the group consisting of titanium and a titanium alloy; thermally spraying titanium hydride having a particle size of 10 to 100 μm onto the surface of the blasted metallic core material to make the surface of the core material rough to a maximum surface roughness of 15 to 100 μm; and thermally spraying a ceramic material selected from the group consisting of alumina, hydroxyapatite and a mixture of alumina and hydroxyapatite onto the surface of the resulting core material, thereby forming a layer of the ceramic material of 10 to 200 μm in thickness on the surface.
Claim 10
Independent Claim
62 words
A method for producing an endosseous implant which comprises: thermally spraying titanium hydride onto a surface of a metallic core material to make the surface of the metallic core material rough to a maximum surface roughness of 15 to 100 μm; and then thermally spraying a ceramic material onto the roughened surface without using any bonding agent which contains toxic metal ions.
Claim 11
Independent Claim
62 words
A method for producing an endosseous implant which comprises: thermally spraying titanium hydride onto a surface of a metallic core material to make the surface of the metallic core material rough to a maximum surface roughness of 15 to 100 μm; and then thermally spraying a ceramic material onto the roughened surface without using any bonding agent which contains toxic metal ions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |