US4126937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material and method for introducing ionic silver to dental pulp
Assignee: MDT Corp
•
Filing: 1977-03-23
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Granted: 1978-11-28
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Expires: 1997-03-23
Abstract
Abstract A pulp cap mixture is prepared from silver particles and a dental cement such as polycarboxylate cement. Provision is made to apply low intensity direct current through the material placed in proximity to the pulp tissue. Ionic silver is released which provides anti-bacterial action.
Inventors
- 👤 Franklin H. Ellis
- 👤 Edward A. Thibodeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/60; A61K6/69; A61K6/80; A61K6/84; A61K6/844; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
The method of applying ionic silver to a tooth undergoing dental restoration comprising the steps of: preparing a cavity by removing infected dentin; applying a layer of a soft and moldable carrier mixed with silver particles, within said cavity and in proximity to the pulp chamber of said tooth said carrier being hardenable, allowing the carrier to harden; and causing positive direct in the range of 1 to 40 microamperes to flow through the layer into adjacent tissue for a time period.
Claim 2
Independent Claim
82 words
The method of applying ionic silver to a tooth undergoing dental restoration comprising the steps of: preparing a cavity by removing infected dentin; applying a layer of a soft and moldable carrier mixed with silver particles, within said cavity and in proximity to the pulp chamber of said tooth said carrier being hardenable, allowing the carrier to harden; and causing positive direct in the range of 1 to 40 microamperes to flow through the layer into adjacent tissue for a time period.
Claim 3
Dependent Claim
46 words
The method of claim 1 which includes the further steps of inserting a silver wire into the layer before the carrier hardens, said wire providing electrical connection to the layer; and cutting the wire flush to the layer after completion of the application of direct current.
References Cited (Backward Citations)
US2069112A
Cited
US4027393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |