US4746532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of endosseous implants
Assignee: Matsumoto Dental College
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Filing: 1986-07-29
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Granted: 1988-05-24
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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 titanium core material which is previously subjected to a surface oxidation treatment, which can yield implants which have excellent characteristics of both of 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
- 👤 Kazuo Suzuki
- 👤 Mitsuo Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; A; A61; A61C; A61C8/00; A61C8/0012; A61C8/0013; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61L27/32; C23C4/02; C23C4/11; A61F2/3094; A61F2002/30906; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00592; A61F2310/00598; A61F2310/00604; A61F2310/00796; A61L2430/00; A61L2430/02; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
In a method for producing endosseous implants comprising thermally spraying a ceramic material onto the surface of a metallic titanium core material, the improvement which comprises subjecting the metallic titanium core material to a surface oxidation treatment by heating the core material at a temperature of 400° to 800° C. in air and then thermally spraying the ceramic material onto the surface of the metallic titanium core material, wherein the ceramic material is aluminum oxide, hydroxyapatite or a mixture thereof.
Claim 2
Dependent Claim
80 words
In a method for producing endosseous implants comprising thermally spraying a ceramic material onto the surface of a metallic titanium core material, the improvement which comprises subjecting the metallic titanium core material to a surface oxidation treatment by heating the core material at a temperature of 400° to 800° C. in air and then thermally spraying the ceramic material onto the surface of the metallic titanium core material, wherein the ceramic material is aluminum oxide, hydroxyapatite or a mixture thereof.
Claim 3
Dependent Claim
23 words
The method according to claim 1, wherein the temperature for the surface oxidation treatment is in the range of 450° to 550° C.
Claim 4
Dependent Claim
26 words
The method according to claim 1, wherein the surface of the metallic titanium core material is made rough prior to subjecting to the surface oxidation treatment.
Claim 5
Dependent Claim
15 words
An endosseous implant which is produced by the method as set forth in claim 1.
Claim 6
Dependent Claim
17 words
The method according to claim 1, wherein the thermal spraying is carried out by thermal plasma spraying.
Claim 7
Dependent Claim
18 words
The method according to claim 1, wherein the surface oxidation treatment is conducted for 1 to 100 minutes.
Claim 8
Dependent Claim
20 words
The method according to claim 1, wherein the thickness of the ceramic coating layer is from 10 to 200 μm.
Claim 9
Dependent Claim
20 words
The implant according to claim 4, wherein the thickness of the ceramic coating layer is from 10 to 200 μm.
Claim 10
Dependent Claim
31 words
The method according to claim 1, wherein a ground mixture of hydroxyapatite and aluminum oxide is thermally sprayed to form a coating layer having an average thickness of about 150 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |