US4346750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making dental bridge using a prefabricated non-precious pontic
Assignee: Individual
•
Filing: 1980-11-05
•
Granted: 1982-08-31
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Expires: 2000-11-05
Abstract
Abstract Disclosed is a prefabricated pontic framework formed of a non-precious material and method to be used in making dental bridges. The prefabricated pontic framework comprises a plurality of pontic supports with a connecting bar mounted on opposed sides of each pontic support, such pontic framework being selected and cut to size for a particular bridgework situation.
Inventors
- 👤 Mike Z. Nemethy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:24
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/275; A61C13/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A method of making dental bridges wherein at least a pair of opposed wax copings, formed by at least a pair of opposed abutment dies, are subsequently invested and cast into precious alloy copings, the improvement comprising the steps of: providing a prefabricated pontic framework of non-precious metal having at least one pontic support with a pair of connecting bars extending therefrom; cutting the connecting bars to a desired length to fit between the abutment dies of said pair of opposed abutment dies; attaching one of the connecting bars to each of the wax copings of said pair of opposed wax copings; investing the pair of opposed wax copings with the prefabricated pontic framework disposed therebetween.
Claim 2
Independent Claim
116 words
A method of making dental bridges wherein at least a pair of opposed wax copings, formed by at least a pair of opposed abutment dies, are subsequently invested and cast into precious alloy copings, the improvement comprising the steps of: providing a prefabricated pontic framework of non-precious metal having at least one pontic support with a pair of connecting bars extending therefrom; cutting the connecting bars to a desired length to fit between the abutment dies of said pair of opposed abutment dies; attaching one of the connecting bars to each of the wax copings of said pair of opposed wax copings; investing the pair of opposed wax copings with the prefabricated pontic framework disposed therebetween.
Claim 3
Dependent Claim
16 words
In the method of claim 1, providing a prefabricated pontic framework formed of a non-precious alloy.
Claim 4
Dependent Claim
63 words
In the method of claim 1, providing a plurality of pontic supports rigidly connected to each other with the connecting bars; providing the prefabricated pontic framework with a pair of connecting bars extending from each end of the prefabricated pontic framework; cutting the prefabricated pontic framework across one of connecting bars to obtain the desired number of pontic supports of the desired size.
Claim 5
Dependent Claim
38 words
In the method of claim 1, mounting the pair of opposed copings, having the prefabricated pontic framework therebetween, on a prong-like sprue; casting the pair of opposed wax coping and union to the framework in a precious alloy.
References Cited (Backward Citations)
US3661198A
Cited
US4176706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |