US3874082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth treatment method
Assignee: Individual
•
Filing: 1973-06-04
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Granted: 1975-04-01
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Expires: 1993-06-04
Abstract
Abstract After access and debridement of pulp from an infected tooth a piece of permeable, resilient, and physiologically inactive material, e.g., polyurethane, is compressed and inserted in the resulting cavity. When the material is released in the cavity it expands and engages the wall of the cavity, thereby permitting pus and other fluids to flow from the tooth while the material prevents the flow of food particles into the cavity. This decreases the time required for the resolution of the infection in the tooth. Thereafter, the material is removed and the cavity is sealed.
Inventors
- 👤 Lewis Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/891; A61K6/893
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A method of treating a tooth in a mouth, the tooth having a cavity extending into the tooth from its surface, comprising the step of lodging a permeable, resilient, and physiologically inactive material in the cavity, whereby fluid can flow from the cavity through the material and the material prevents food particles in the mouth from flowing in the opposite direction.
Claim 2
Independent Claim
61 words
A method of treating a tooth in a mouth, the tooth having a cavity extending into the tooth from its surface, comprising the step of lodging a permeable, resilient, and physiologically inactive material in the cavity, whereby fluid can flow from the cavity through the material and the material prevents food particles in the mouth from flowing in the opposite direction.
Claim 3
Dependent Claim
47 words
A method as defined in claim 1 wherein said lodging is accomplished by compressing the material, inserting the compressed material into the cavity, and releasing the material, thereby permitting the material to expand into engagement with at least an annular section of the wall of the cavity.
Claim 4
Dependent Claim
13 words
A method as defined in claim 2 wherein said material is polyurethane foam.
Claim 5
Dependent Claim
35 words
A method as defined in claim 3 wherein said polyurethane foam is of the type having a density which is substantially 6 pounds per cubic foot and has pores with average diameters of 0.2 millimeters.
Claim 6
Dependent Claim
20 words
A method as defined in claim 2 further including the steps of removing the material and permanently Sealing the cavity.
Claim 7
Dependent Claim
13 words
A method as defined in claim 5, wherein said material is polyurethane foam.
References Cited (Backward Citations)
US2884925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |