US3815243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge for dental matrix bands
Assignee: Individual
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Filing: 1973-06-18
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Granted: 1974-06-11
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Expires: 1993-06-18
Abstract
Abstract A wedge structure adapted to be used in association with dental matrix bands of the type utilized when inserting filling material in tooth cavities. The wedge structure is adapted to be inserted between a tooth carrying a band and an adjacent tooth whereby the wedge will serve to tightly hold the band against the tooth. The wedge preferably defines a triangular cross section and a serrated fin appendage on the stem whereby the wedge is particularly suited for insertion at the base of adjacent teeth in the area where undesirable movement of filling material is most prevalent.
Inventors
- 👤 W Eames
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:04
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/80; A61C5/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
In the application of a dental matrix band for use in the filling of a tooth wherein the band is positioned around the tooth during insertion of filling material, the improvement in means for holding the band tightly in position around the tooth comprising at least one wedge inserted between said tooth and an adjacent tooth, said wedge being formed of a soft plastic material whereby the wedge is deformed when pressed between teeth, said wedge comprising an elongated tapered stem portion, said stem portion having a triangular cross section including a base spanning the gap between the teeth and positioned in contact with the gingival, said base including outwardly extending serrated fins formed along both side edges thereof assisting in holding the wedge in position, the top edge of the stem comprising a substantially straight edge and wherein the base tapers sharply toward the top edge adjacent the end of the wedge, and an enlarged head portion for facilitating insertion of the wedge between the teeth, the wedge thereby holding the band tightly around the tooth, said head portion including an annular recess defined at approximately the midsection of the head portion for facilitating gripping of the head.
Claim 2
Dependent Claim
199 words
In the application of a dental matrix band for use in the filling of a tooth wherein the band is positioned around the tooth during insertion of filling material, the improvement in means for holding the band tightly in position around the tooth comprising at least one wedge inserted between said tooth and an adjacent tooth, said wedge being formed of a soft plastic material whereby the wedge is deformed when pressed between teeth, said wedge comprising an elongated tapered stem portion, said stem portion having a triangular cross section including a base spanning the gap between the teeth and positioned in contact with the gingival, said base including outwardly extending serrated fins formed along both side edges thereof assisting in holding the wedge in position, the top edge of the stem comprising a substantially straight edge and wherein the base tapers sharply toward the top edge adjacent the end of the wedge, and an enlarged head portion for facilitating insertion of the wedge between the teeth, the wedge thereby holding the band tightly around the tooth, said head portion including an annular recess defined at approximately the midsection of the head portion for facilitating gripping of the head.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |