US4408990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endodontic dental implant
Assignee: Individual
•
Filing: 1982-04-26
•
Granted: 1983-10-11
•
Expires: 2002-04-26
Abstract
Abstract An endodontic implant for insertion into the jawbone of a patient through a bore formed in a tooth to stabilize the tooth. The implant comprises an elongated post having sides tapering inward from a larger diameter first end to a smaller diameter second end. A plurality of external threads are formed on the post and extend along the length of the post from the first and second ends for a predetermined distance. An intermediate, tapered, smooth-sided section is formed on the post between the first and second threaded portions.
Inventors
- 👤 Carl E. Misch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:31
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0003; A61C8/0004
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
An endodontic implant for insertion through a tooth into the jaw bone of a user comprising: an elongated post having first and second opposed ends; the sides of the post tapering inward along the length of the post from a larger diameter first end to a smaller diameter second end; a plurality of external threads formed on the post adjacent the first end and extending a predetermined distance along the post from the first end to define a first threaded section; a plurality of external threads formed on the post adjacent the second end and extending a predetermined distance along the post from the second end to define a second threaded section; and the first and second threaded sections being spaced apart to define an intermediate, tapered, smooth-sided section on the post; the lengths of the first and second threaded sections being selected so as to locate the intermediate smooth-sided section within the narrow apex region of the tooth.
Claim 2
Dependent Claim
159 words
An endodontic implant for insertion through a tooth into the jaw bone of a user comprising: an elongated post having first and second opposed ends; the sides of the post tapering inward along the length of the post from a larger diameter first end to a smaller diameter second end; a plurality of external threads formed on the post adjacent the first end and extending a predetermined distance along the post from the first end to define a first threaded section; a plurality of external threads formed on the post adjacent the second end and extending a predetermined distance along the post from the second end to define a second threaded section; and the first and second threaded sections being spaced apart to define an intermediate, tapered, smooth-sided section on the post; the lengths of the first and second threaded sections being selected so as to locate the intermediate smooth-sided section within the narrow apex region of the tooth.
Claim 3
Dependent Claim
52 words
The endodontic implant of claim 1 wherein: the first threaded section extends for approximately 10 mm. along the length of the post; the intermediate section extends for approximately 12 mm. along the length of the post; and the second threaded section extends for approximately 10 mm. along the length of the post.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |