US5478237A
Expired / Lapsed
US
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Implant and method of making the same
Assignee: Nikon Corp
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Filing: 1993-06-25
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Granted: 1995-12-26
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Expires: 2013-06-25
Abstract
Abstract An implant comprises and implant base body, at least a surface of which is composed of titanium or titanium alloy, and an anodic oxidation film formed on the surface, the film containing Ca and P. The implant may further comprise a calcium phosphate compound such as hydroxyapatite precipitated on the anodic oxidation film. The implant may be prepared by subjecting the base body to anodic oxidation in an electrolyte containing Ca compound and P compound, thereby forming an anodic oxidation film containing Ca and P. In addition, the film may be subjected to a hydrothermal treatment, thereby forming a film of a calcium phosphate compound such as hydroxyapatite on the anodic oxide film.
Inventors
- 👤 Hitoshi Ishizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:42
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0012; A61C8/0013; A61C8/0015; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/32; A61F; A61F2310/00; A61F2310/00389; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
46 words
An implant comprising: an implant base body, at least a surface portion of which is composed of one of titanium and titanium alloy; and an anodic oxidation film formed on said surface portion of the implant base body, said film containing mainly ionic Ca and P.
Claim 2
Dependent Claim
46 words
An implant comprising: an implant base body, at least a surface portion of which is composed of one of titanium and titanium alloy; and an anodic oxidation film formed on said surface portion of the implant base body, said film containing mainly ionic Ca and P.
Claim 3
Dependent Claim
18 words
An implant according to claim 1, wherein a calcium phosphate compound is precipitated on said anodic oxidation film.
Claim 4
Independent Claim
79 words
A method of making an implant, comprising: subjecting an implant base body, at least a surface portion of which is composed of one of titanium and titanium alloy, to anodic oxidation in an electrolytic solution containing Ca ion and P ion or phosphoric ion to form an anodic oxidation film on the body; and subjecting the anodic oxidized body to a hydrothermal treatment in a high pressure steam, thereby precipitating a calcium phosphate compound on the anodic oxidation film.
Claim 5
Independent Claim
79 words
A method of making an implant, comprising: subjecting an implant base body, at least a surface portion of which is composed of one of titanium and titanium alloy, to anodic oxidation in an electrolytic solution containing Ca ion and P ion or phosphoric ion to form an anodic oxidation film on the body; and subjecting the anodic oxidized body to a hydrothermal treatment in a high pressure steam, thereby precipitating a calcium phosphate compound on the anodic oxidation film.
Claim 6
Dependent Claim
10 words
An implant prepared according to the method of claim 3.
Claim 7
Dependent Claim
18 words
An electrolyte for the preparation of an implant comprising, as main components, glycerophosphate and a salt of calcium.
Claim 8
Dependent Claim
18 words
An electrolyte for the preparation of an implant comprising, as main components, glycerophosphate and a salt of calcium.
Claim 9
Independent Claim
44 words
A method of making an implant, comprising: subjecting an implant base body, at least a surface portion of which is composed of one of titanium and titanium alloy, to anodic oxidation in an electrolytic solution containing glycerophosphate and calcium salt as main electrolyte ingredients.
Claim 10
Independent Claim
44 words
A method of making an implant, comprising: subjecting an implant base body, at least a surface portion of which is composed of one of titanium and titanium alloy, to anodic oxidation in an electrolytic solution containing glycerophosphate and calcium salt as main electrolyte ingredients.
Claim 11
Dependent Claim
10 words
An implant prepared according to the method of claim 6.
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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) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |