US5062798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
SiC based artificial dental implant
Assignee: Niterra Co Ltd
•
Filing: 1989-04-26
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Granted: 1991-11-05
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Expires: 2009-04-26
Abstract
Abstract An artificial radix dentis comprises a prong portion buried in an alveolar bone, which is made of a SiC-based ceramic material or is covered with a SiC-based film.
Inventors
- 👤 Kazuto Tsuge
- 👤 Masateru Hattori
- 👤 Kazuo Kondo
- 👤 Yoshimasa Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0012
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
An artificial radix dentis comprising a first portion adapted to be buried in an alveolar bone and a second portion adapted to contact a gingiva, wherein at least an outermost layer of said first portion consists essentially of a SiC-based ceramic material.
Claim 2
Dependent Claim
42 words
An artificial radix dentis comprising a first portion adapted to be buried in an alveolar bone and a second portion adapted to contact a gingiva, wherein at least an outermost layer of said first portion consists essentially of a SiC-based ceramic material.
Claim 3
Dependent Claim
42 words
An artificial radix dentis according to claim 1, wherein said second portion is covered with a first layer made of a phosphate glass, and wherein said first layer is covered with a second layer made of a calcium phosphate type ceramic material.
Claim 4
Dependent Claim
30 words
An artificial radix dentis according to claim 1, wherein said SiC-based ceramic material contains SiC in an amount of at least 90% of the total weight of said ceramic material.
Claim 5
Dependent Claim
26 words
An artificial radix dentis according to claim 1, wherein said SiC-based ceramic material has an average crystal grain size of 1-5μm and a porosity of 0-10%.
Claim 6
Dependent Claim
27 words
An artificial radix dentis comprising a prong portion adapted to be buried in a bone, wherein said prong is covered with a film consisting essentially of SiC.
Claim 7
Dependent Claim
27 words
An artificial radix dentis comprising a prong portion adapted to be buried in a bone, wherein said prong is covered with a film consisting essentially of SiC.
Claim 8
Dependent Claim
20 words
An artificial radix dentis according to claim 5, wherein said SiC-based film is formed by a chemical vaporphase deposition process.
Claim 9
Dependent Claim
17 words
The artificial radix dentis of claim 5, wherein said film is at least 95% by weight SiC.
References Cited (Backward Citations)
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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) | 1994-11-04 | 1995-05-06 | 1995-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-04 | 1999-05-06 | 1999-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-04 | 2003-05-06 | 2003-11-05 | $7700.00 | Window Closed / Lapsed |