Patent US4904534A successfully refreshed from Google Patents.
US4904534A
Expired / Lapsed
US
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Implant material
Assignee: Kureha Corp
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Filing: 1989-06-23
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Granted: 1990-02-27
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Expires: 2009-06-23
Abstract
Abstract Disclosed herein is a novel implant material excellent in biocompatibility, stability in living body and mechanical properties, comprising a metallic material and a layer of a thermosetting resin or a layer of a composition comprising the thermosetting resin and hydroxyapatite, the layer of the thermosetting resin or the layer of the composition being formed around the metallic material.
Inventors
- 👤 Hirosi Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:35
CPC Classifications
A; A61; A61F; A61F2/00; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61C; A61C8/00; A61C8/0012; A61C8/0013; A61C8/0016; A61L27/28; A61L27/34; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
An implant material comprising a metallic material and a layer of a thermosetting resin thereon or a layer of a composition comprising a mixture of a thermosetting resin with hydroxyapatite particles therein, the thermosetting resin having excellent stability in a living body and being bicompatible, the layer of the thermosetting resin or the layer of the composition being formed around and adhered to the metallic material.
Claim 2
Dependent Claim
66 words
An implant material comprising a metallic material and a layer of a thermosetting resin thereon or a layer of a composition comprising a mixture of a thermosetting resin with hydroxyapatite particles therein, the thermosetting resin having excellent stability in a living body and being bicompatible, the layer of the thermosetting resin or the layer of the composition being formed around and adhered to the metallic material.
Claim 3
Dependent Claim
26 words
An implant material according to claim 1, wherein the weight ratio of said thermosetting resin to hydroxyapatite is in the range of from 65/35 to 15/85.
Claim 4
Dependent Claim
43 words
An implant material according to claim 1, wherein said thermosetting resin is a polymer of a monomer selected from the group consisting of bisphenol A diglycidyl methacrylate, 1,3-butanediol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate and triethylene glycol dimethacrylate and a mixture thereof.
Claim 5
Dependent Claim
18 words
An implant material according to claim 3, wherein said thermosetting resin is a polymer of triethylene glycol dimethacrylate.
Claim 6
Dependent Claim
20 words
An implant material according to claim 1, wherein the mean diameter of said hydroxyapatite particles is less than 1000 μm.
Claim 7
Dependent Claim
32 words
An implant material according to claim 1, wherein said thermosetting resin is prepared by mixing from 5-95 wt. % particles of the polymer into the corresponding monomer prior to hardening the resin.
Claim 8
Dependent Claim
21 words
An implant material according to claim 6, wherein the diameter of said polymer particles mixed into the monomer is 2-500 μm.
Claim 9
Dependent Claim
43 words
A biocompatible implant comprising a metallic core material having attached thereto as an outer coating a layer of a thermosetting resin composition, optionally with hydroxyapatite particles distributed therein, the thermosetting resin being stable in a living body and biocompatible with adjacent body tissue.
Claim 10
Dependent Claim
43 words
A biocompatible implant comprising a metallic core material having attached thereto as an outer coating a layer of a thermosetting resin composition, optionally with hydroxyapatite particles distributed therein, the thermosetting resin being stable in a living body and biocompatible with adjacent body tissue.
Claim 11
Dependent Claim
25 words
The biocompatible implant of claim 8, wherein the thermosetting resin composition, prior to thermoset, contained particles of the thermosetting resin distributed throughout the corresponding monomer.
Claim 12
Dependent Claim
24 words
The biocompatible implant of claim 9, wherein the interface between the metallic core and the thermosetting resin composition is uniform and devoid of cracks.
Claim 13
Dependent Claim
26 words
The implant of claim 8, wherein the metallic core has a plurality of grooved anchoring means on its outer surface for dispersing external stress after implantation.
Claim 14
Dependent Claim
38 words
A biocompatible artificial tooth of a metallic core and an outer coating of thermosetting resin composition having an elastic modulus and hardness similar to a natural bone, the thermosetting resin composition containing a polymer of triethylene glycol dimethacrylate.
Claim 15
Dependent Claim
38 words
A biocompatible artificial tooth of a metallic core and an outer coating of thermosetting resin composition having an elastic modulus and hardness similar to a natural bone, the thermosetting resin composition containing a polymer of triethylene glycol dimethacrylate.
Claim 16
Dependent Claim
61 words
An biocompatible implantable artificial tooth of a metallic core and an outer coating of a thermosetting resin composition having an elastic modulus and hardness similar to a natural bone, the thermosetting resin composition containing a polymer of triethylene glycol dimethacrylate with particles of hydroxyapatite distributed therein, the weight ratio of thermosetting resin to hydroxyapatite in the range of 65:35 to 15:85.
Claim 17
Dependent Claim
61 words
An biocompatible implantable artificial tooth of a metallic core and an outer coating of a thermosetting resin composition having an elastic modulus and hardness similar to a natural bone, the thermosetting resin composition containing a polymer of triethylene glycol dimethacrylate with particles of hydroxyapatite distributed therein, the weight ratio of thermosetting resin to hydroxyapatite in the range of 65:35 to 15:85.
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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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |