US4617024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auditory ossicle prosthesis and process for its manufacture
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1983-11-28
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Granted: 1986-10-14
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Expires: 2003-11-28
Abstract
Abstract An auditory ossicle prosthesis is described comprising a plate (1) with a groove (7) applied to its upper side and a shaft (2) eccentrically applied to its lower side. The prosthesis consists of a bioactive material and contains additionally at least in one partial area an insoluble bioinert material, which is applied mainly as a coating material in the form of an additive layer (S(+)) or a subtractive layer (S(-)). Suitable coating processes and substances are disclosed. If S(-) layers are applied, they may be exposed subsequently to a sealing and/or silanizing treatment.
Inventors
- 👤 Heinz Broemer
- 👤 Klaus Deutscher
- 👤 Henning Franek
- 👤 Ralf Reck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:20
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/18; A61L; A61L27/00; A61L27/28; A61L27/30; A61F2002/183; A61L2430/00; A61L2430/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
184 words
An auditory ossicle prosthesis, comprising: a generally planar plate; a shaft attached eccentrically to the underside of said plate; and a groove provided in the top side of the plate, wherein the plate and attached shaft have a mirror symmetrical configuration with respect to at least one symmetry plane perpendicular to the plane of the plate and passing through the shaft; the shaft is attached so that its contact surface with the plate is located on the symmetry plane of the plate, but is removed by at least one-half of the diameter of the shaft from the boundary area of the plate; the groove is arranged on the top side of the plate in its front half and is aligned perpendicular to the symmetry plane of the prosthesis; and wherein at least one of said plate and said shaft is comprised of a bioactive material and the prosthesis comprising at least one partial area of said bioactive material which has been selectively rendered bioinactive and which comprises an insoluble bioinert material for preventing ion exchange in vivo between the bioactive material and body fluids.
Claim 2
Dependent Claim
184 words
An auditory ossicle prosthesis, comprising: a generally planar plate; a shaft attached eccentrically to the underside of said plate; and a groove provided in the top side of the plate, wherein the plate and attached shaft have a mirror symmetrical configuration with respect to at least one symmetry plane perpendicular to the plane of the plate and passing through the shaft; the shaft is attached so that its contact surface with the plate is located on the symmetry plane of the plate, but is removed by at least one-half of the diameter of the shaft from the boundary area of the plate; the groove is arranged on the top side of the plate in its front half and is aligned perpendicular to the symmetry plane of the prosthesis; and wherein at least one of said plate and said shaft is comprised of a bioactive material and the prosthesis comprising at least one partial area of said bioactive material which has been selectively rendered bioinactive and which comprises an insoluble bioinert material for preventing ion exchange in vivo between the bioactive material and body fluids.
Claim 3
Dependent Claim
20 words
An auditory ossicle prosthesis according to claim 1, comprising in at least one partial surface area an insoluble, bioinert material.
Claim 4
Dependent Claim
20 words
An auditory ossicle prosthesis according to claim 1, wherein said partial area comprises a coating of an insoluble, bioinert material.
Claim 5
Dependent Claim
28 words
An auditory ossicle prosthesis according to claim 3, wherein the coating comprises at least one additively applied protective layer with a thickness between about 0.25 and 10 microns.
Claim 6
Dependent Claim
28 words
An auditory ossicle prosthesis according to claim 3, wherein the coating comprises at least one subtractively produced conversion layer with a thickness between about 0.25 and 5 microns.
Claim 7
Dependent Claim
34 words
An auditory ossicle prosthesis according to claim 3, wherein the coating comprises at least one conversion layer produced on the prosthesis and at least one additively applied protective layer applied on said conversion layer.
Claim 8
Dependent Claim
23 words
An auditory ossicle prosthesis according to claim 1, wherein the prosthesis shaft comprises at least in its mantle area in insoluble bioinert material.
Claim 9
Dependent Claim
24 words
An auditory ossicle prosthesis according to claim 1, wherein only the plate, at least on its upper side, is comprised of a bioactive material.
Claim 10
Dependent Claim
24 words
An auditory ossicle prosthesis according to claim 1, wherein the plate comprises a bioactive solid material and the shaft comprises a bioinert solid material.
Claim 11
Dependent Claim
36 words
An auditory ossicle prosthesis according to claim 1, wherein the plate comprises at least in its upper surface area a bioactive material and the shaft comprises at least in its mantle area an insoluble bioinert material.
Claim 12
Dependent Claim
126 words
An auditory ossicle prosthesis according to claim 1, wherein the bioinert material or the bioinert layer comprises at least one of the following substances: (a) a metal comprising gold, platinum or titanium, or a metal alloy; (b) carbon in the form of pyrolytic carbon (graphite); or a carbon compound comprising silicon carbide (SiC), titanium carbide (TiC) or boron carbide (B 4 C); (c) a ceramic material comprising hexagonal boron nitride (BN), titanium nitride (TiN) or silicon nitride (Si 3 N 4 ); (d) a partially crystalline inorganic composite system comprising an enamel; (e) an inorganic single component glass or a multiple component glass; or (f) an oxide comprising titanium dioxide (TiO 2 ), zirconium dioxide (ZrO 2 ) or aluminum oxide (Al 2 O 3 ).
Claim 13
Dependent Claim
31 words
An auditory ossicle prosthesis according to claim 1, wherein the bioinert material or the bioinert layer comprises an apatite-free residual-bioglass ceramic or residual-bioceramic or residual-bioglass, with or without a silane layer.
Claim 14
Dependent Claim
18 words
An auditory ossicle prosthesis according to claim 1, wherein the bioactive material comprises a bioglass or a bioglass-ceramic.
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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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |