Patent US5397362A successfully refreshed from Google Patents.
US5397362A
Expired / Lapsed
US
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Implant prosthesis and method for producing same
Assignee: Kyocera Corp
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Filing: 1993-09-27
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Granted: 1995-03-14
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Expires: 2013-09-27
Abstract
Abstract An implant prosthesis comprising implant substrate of ceramic material, a thin glass layer coated over the adhering interface of the substrate relative at least to a bone, and a thermally sprayed layer of calcium phosphate based material formed over the glass layer. The implant provides excellent adhesion of the thermally sprayed layer of calcium phosphate based material to the substrate, with ensuring advantages of stabilized implantation in a living body in that the thin glass layer between the substrate and the calcium phosphate based material removes fear of the sprayed material coming off and/or falling off the substrate or possibility of bringing about reduced strength of the substrate.
Inventors
- 👤 Iwao Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:49
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; A; A61; A61L; A61L27/00; A61L27/02; A61L27/10; A61L27/28; A61L27/30; A61L27/32; B; B24; B24C; B24C1/00; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; C23; C23C; C23C4/00; C23C4/02; C23C4/04; C23C4/10; A61F; A61F2310/00; A61F2310/00389; A61F2310/00592; A61F2310/00796; C04B2111/00; C04B2111/00474; C04B2111/00836
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
An implant prosthesis produced by the steps of: (a) providing a substrate of ceramic material; (b) coating the substrate with a thin glass layer, the thin glass layer defining a surface remote from the substrate; (c) roughening the surface of the thin glass layer remote from the substrate; (d) thermally spraying a layer of calcium phosphate-based material on the roughened surface of said glass layer; and (e) firing said layer of calcium phosphate based material at a temperature in the range of 600° to 1100° C.
Claim 2
Dependent Claim
86 words
An implant prosthesis produced by the steps of: (a) providing a substrate of ceramic material; (b) coating the substrate with a thin glass layer, the thin glass layer defining a surface remote from the substrate; (c) roughening the surface of the thin glass layer remote from the substrate; (d) thermally spraying a layer of calcium phosphate-based material on the roughened surface of said glass layer; and (e) firing said layer of calcium phosphate based material at a temperature in the range of 600° to 1100° C.
Claim 3
Dependent Claim
37 words
An implant prosthesis according to claim 1, wherein said ceramic material is selected from the group consisting of monocrystalline alumina ceramics, polycrystalline alumina ceramics, zirconium dioxide ceramic, and said calcium phosphate-based material is hydroxyapatite or tricalcium phosphate.
Claim 4
Dependent Claim
29 words
An implant prosthesis according to claim 1, wherein the step of roughening the surface of the glass layer comprises the step of sandblasting the surface of the glass layer.
Claim 5
Dependent Claim
31 words
An implant prosthesis according to claim 3, further including, prior to step (d), the step of firing said glass layer at a temperature in the range of 900° to 1300° C.
Claim 6
Dependent Claim
37 words
An implant prosthesis according to claim 4, wherein said glass layer obtained in step (b) has a thermal expansion coefficient of from 4.0×10 -6 /° C. to 9.0×10 -6 /° C. and said ceramic material is alumina.
Claim 7
Dependent Claim
31 words
An implant prosthesis according to claim 1, further including, prior to step (d), the step of firing said glass layer at a temperature in the range of 900° to 130° C.
Claim 8
Dependent Claim
31 words
An implant prosthesis according to claim 1, wherein said glass layer obtained in step (b) has a thermal expansion coefficient of from 3.0×10 -6 /° C. to 12.0×10 -6/ ° C.
Claim 9
Dependent Claim
26 words
An implant prosthesis according to claim 1, wherein said glass layer is 0,001-2 mm in thickness and said thermally sprayed layer is 0,005-1 mm in thickness.
References Cited (Backward Citations)
FR2378733A1
Cited
US4259072A
Cited
US4366253A
Cited
US4483678A
Cited
EP0264917A2
Cited
EP0324143A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |