US4303389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for the clinical application of fillings for dental cavities
Assignee: Individual
•
Filing: 1980-06-12
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Granted: 1981-12-01
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Expires: 2000-06-12
Abstract
Abstract An instrument for the clinical application of fillings for dental cavities comprises a matrix retainer and a proximal central matrix provided with a detachable element for ensuring that the tooth considered is in contact with the adjacent tooth after filling of the cavity. The detachable contact element is provided with an anchoring member and inserted in a cutout formed in the matrix. After setting of the filling material within the dental cavity, the detachable element remains incorporated in the material by means of the anchoring member.
Inventors
- 👤 Angelo Salsarulo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/80; A61C5/85
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
An instrument for the clinical application of fillings for dental cavities, comprising a matrix retainer and a matrix having a cutout that is entirely surrounded by the material of the matrix, a detachable element disposed in said cutout formed in the matrix and being adapted to remain incorporated in filling material for said dental cavity after setting of the filling material by means of an internal anchoring member embedded in said material, and means detachably securing the detachable element to the rest of the matrix while filling of the dental cavity is in progress.
Claim 2
Dependent Claim
94 words
An instrument for the clinical application of fillings for dental cavities, comprising a matrix retainer and a matrix having a cutout that is entirely surrounded by the material of the matrix, a detachable element disposed in said cutout formed in the matrix and being adapted to remain incorporated in filling material for said dental cavity after setting of the filling material by means of an internal anchoring member embedded in said material, and means detachably securing the detachable element to the rest of the matrix while filling of the dental cavity is in progress.
Claim 3
Dependent Claim
25 words
An instrument according to claim 1, wherein the detachable element has an external surface that is flush with the adjacent external surface of the matrix.
Claim 4
Dependent Claim
42 words
An instrument according to claim 1, wherein the detachable element is secured to the rest of the matrix while filling of the dental cavity is in progress, by applying an adhesive tape or adhesive wax on the outer face of said matrix.
Claim 5
Dependent Claim
25 words
An instrument according to claim 1 wherein the detachable element is an adhesive clinical retaining element consisting for example of epoxy resin, cyanoacrylate or silicone.
Claim 6
Dependent Claim
41 words
An instrument according to claim 1, wherein the matrix comprises an upper portion representing an anatomical face and sculptured so as to reproduce an occlusal sculpture of the tooth in the filling material by means of a compressing or condensing operation.
Claim 7
Dependent Claim
96 words
An instrument according to claim 1, wherein the matrix retainer is a metallic ring shaped in such a manner as to clamp the matrix aganst the tooth, said ring being open on one side and provided at each end with a lateral coil located at the level of the proximal face opposite to that of the filling so as to bear on said proximal face and thus have the effect of curving the matrix against the cervical edge of the dental cavity under the action of a force applied in a direction opposite to said cavity.
References Cited (Backward Citations)
US2538486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |