US4836781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental tool with dual restoration material retainers
Assignee: Newtech Products Inc
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Filing: 1988-01-27
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Granted: 1989-06-06
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Expires: 2008-01-27
Abstract
Abstract A dental tool for assisting in cavity repair in two adjacent teeth by facilitating removal of matrix bands therefrom after installation of filler restoration material. The tool includes a shank terminating in a bifurcated end portion, each branch of the bifurcated end portion terminating in a working surface having an inner edge. The inner edges of the working surfaces are separated by a gap having a width sufficiently large to accommodate a dental matrix band and sufficiently narrow to enable the working surfaces to maintain tight common interproximal contact with the filler restoration material in adjacent teeth.
Inventors
- 👤 Charles I. Meinershagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:05
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/80; A61C5/85
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
A dental tool for assisting in cavity repair in two adjacent teeth by facilitating removal of matrix bands therefrom after installation of filler restoration material, said tool comprising a shank terminating in a bifurcated end portion, each branch of said bifurcated end portion terminating in a working surface having an inner edge, the inner edges of the working surfaces being separated by a gap having a width sufficiently large to accommodate a dental matrix band and sufficiently narrow to enable the working surfaces to maintain tight common interproximal contact with the filler restoration material in adjacent teeth.
Claim 2
Dependent Claim
97 words
A dental tool for assisting in cavity repair in two adjacent teeth by facilitating removal of matrix bands therefrom after installation of filler restoration material, said tool comprising a shank terminating in a bifurcated end portion, each branch of said bifurcated end portion terminating in a working surface having an inner edge, the inner edges of the working surfaces being separated by a gap having a width sufficiently large to accommodate a dental matrix band and sufficiently narrow to enable the working surfaces to maintain tight common interproximal contact with the filler restoration material in adjacent teeth.
Claim 3
Dependent Claim
31 words
The invention of claim 1 wherein each branch has an inner surface terminating in said inner edge, and wherein the angle between said inner surface and said working surface is acute.
Claim 4
Dependent Claim
16 words
The invention of claim 1 wherein the working surface of each end portion is generally convex.
Claim 5
Dependent Claim
30 words
The invention of claim 1 wherein the dimensions of the working surface of one of said branches are different from the dimensions of the working surface of the other branch.
References Cited (Backward Citations)
US2245291A
Cited
US4060897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |