Patent US4379694A successfully refreshed from Google Patents.
US4379694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental implant
Assignee: NEODONTICS Inc A CORP OF NV
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Filing: 1978-11-09
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Granted: 1983-04-12
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Expires: 1998-11-09
Abstract
Abstract A dental implant having a core member formed of a gingiva-compatible metal for mounting a dental superstructure in the shape of a tooth crown; a fastening element for dental bridges or the like, wherein the core member is connected with a tissue-compatible biostable polymer matrix which contains reabsorbable, bioreactive sintered calcium phosphate. The core member is constructed from a metal plate flat in cross-section and conformed with the implant shape and which is provided with apertures, wherein the polymer matrix is a covering encompassing the metal plate on all sides thereof and is constituted of a biostable polymer material and reabsorbable finely-divided, sintered calcium phosphate, and in which the apertures are filled with reabsorbable sintered calcium phosphate.
Inventors
- 👤 Guido Riess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0018; A61C8/0031; A61C8/0037; A61C8/0039
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
In a dental implant including a gingiva-compatible metal core member for mounting a dental superstructure in the form of a tooth crown, a fastening element for dental bridges or the like in which the member is connected with a tissue-compatible, biostable polymer matrix having reabsorbable, bioreactive, sintered calcium phosphate, the improvement comprising: said core member being a flat metal plate (1, 11) conformed in shape to said implant and being provided with through-apertures (2, 12) and the polymer matrix is a coating (4, 14) encompassing the metal plate (1, 11) on all sides thereof, and said through-apertures (2, 12) are filled with reabsorbable, sintered calcium phosphate (6, 16).
Claim 2
Dependent Claim
108 words
In a dental implant including a gingiva-compatible metal core member for mounting a dental superstructure in the form of a tooth crown, a fastening element for dental bridges or the like in which the member is connected with a tissue-compatible, biostable polymer matrix having reabsorbable, bioreactive, sintered calcium phosphate, the improvement comprising: said core member being a flat metal plate (1, 11) conformed in shape to said implant and being provided with through-apertures (2, 12) and the polymer matrix is a coating (4, 14) encompassing the metal plate (1, 11) on all sides thereof, and said through-apertures (2, 12) are filled with reabsorbable, sintered calcium phosphate (6, 16).
Claim 3
Dependent Claim
37 words
Implant as claimed in claim 1, said apertured metal plate having a saddle-shaped configuration; and means on the upper surface of said metal plate extending through said coating for the mounting and fastening of the dental superstructure.
Claim 4
Dependent Claim
42 words
Implant as claimed in claim 1, said apertured metal plate being tubularly shaped and having an upper closed end; means on the upper closed end of said metal plate extending through said coating for the mounting and fastening of the dental superstructure.
Claim 5
Dependent Claim
40 words
Implant as claimed in claim 1, said metal plate being constituted of titanium, and said coating being constituted of about 20% to 30% polymethylmethacrylate (PMMA) and about 70% to 80% of powder ground, sintered and finely dispersedly distributed tricalcium phosphate.
Claim 6
Dependent Claim
36 words
Implant as claimed in claim 4, the surface of said metal plate being cleaned by sandblasting and provided with an adhesive medium, said coating being applied to said surface through dipping, spraying, painting or the like.
Claim 7
Dependent Claim
27 words
Implant as claimed in claim 1, said reabsorbable sintered calcium phosphate being prepared in tablets corresponding in size to said apertures and being positioned within said apertures.
References Cited (Backward Citations)
US3789029A
Cited
US3919773A
Cited
US4131597A
Cited
US4073999A
Cited
FR2317904A1
Cited
DE2546824A1
Cited
US4121340A
Cited
US4178686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |