Patent US4490116A successfully refreshed from Google Patents.
US4490116A
Expired / Lapsed
US
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Dental post and wrench therefor and method of restoring bulk to a tooth root therewith
Assignee: Individual
•
Filing: 1984-07-18
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Granted: 1984-12-25
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Expires: 2004-07-18
Abstract
Abstract An improved unitary bulk restoring dental post having a stem of substantially parallel threaded sides divided along its length into separate legs for threaded insertion into a tooth root canal by a wrench that applies a predetermined torque to the dental post to thread it into the tooth root for crown restoration.
Inventors
- 👤 Allan S. Deutsch
- 👤 Barry L. Musikant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:47
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
In the method of restoring bulk to a tooth root with a dental post having relatively movable walls with cutting and forming threads thereon to cut threads into the tooth root, cutting and forming threads into the tooth by threading the dental post thereinto, spacing the walls of the dental post to enable the walls to move relative to each other to absorb fracture producing forces on the tooth root during the cutting and the forming of the threads in the tooth root, and venting the tooth root to the atmosphere to prevent the build-up of fracture producing forces in the tooth root.
Claim 2
Dependent Claim
103 words
In the method of restoring bulk to a tooth root with a dental post having relatively movable walls with cutting and forming threads thereon to cut threads into the tooth root, cutting and forming threads into the tooth by threading the dental post thereinto, spacing the walls of the dental post to enable the walls to move relative to each other to absorb fracture producing forces on the tooth root during the cutting and the forming of the threads in the tooth root, and venting the tooth root to the atmosphere to prevent the build-up of fracture producing forces in the tooth root.
Claim 3
Dependent Claim
18 words
In the method as in claim 1, cementing the walls of the dental post to the tooth root.
Claim 4
Dependent Claim
30 words
In the method as in claim 1, exposing a portion of the dental post beyond the tooth root to provide an anchor for a dental crown to be applied thereto.
Claim 5
Dependent Claim
19 words
In the method as in claim 3, anchoring a dental crown to the exposed portion of the dental post.
Claim 6
Dependent Claim
41 words
In the method as in claim 1, providing the space between the walls of the dental post to present wall edges that wedge into engagement with the tooth root to prevent accidental unthreading of the dental post from the tooth root.
References Cited (Backward Citations)
US1524409A
Cited
US2705837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |