Patent US4631185A successfully refreshed from Google Patents.
US4631185A
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Method of desensitizing hypersensitive dentin employing compositions containing potassium salts
Assignee: Columbia University
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Filing: 1984-03-13
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Granted: 1986-12-23
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Expires: 2004-03-13
Abstract
Abstract A method for reducing sensory nerve activity in a hypersensitive tooth and for desensitizing hypersensitive dentin involves applying to the surface of exposed dentin of a subject's tooth a potassium salt selected from the group consisting of potassium bicarbonate and potassium chloride in an amount effective to reduce sensory nerve activity and to desensitize hypersensitive dentin of hypersensitive teeth. In the presently preferred embodiment of the invention, potassium bicarbonate is the potassium salt and is applied in a formulation, for example, an aqueous solution containing from about 1.0 to about 360.0 mg of potassium bicarbonate per ml of solution.
Inventors
- 👤 Syngcuk Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:51
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61P; A61P1/00; A61P1/02; A61P25/00; A61P25/02; A61Q; A61Q11/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
43 words
A method for reducing sensory nerve activity in a hypersensitive tooth of a subject which comprises applying to the surface of exposed dentin of the hypersensitive tooth potassium bicarbonate in an amount effective to reduce the sensory nerve activity of the hypersensitive tooth.
Claim 2
Independent Claim
43 words
A method for reducing sensory nerve activity in a hypersensitive tooth of a subject which comprises applying to the surface of exposed dentin of the hypersensitive tooth potassium bicarbonate in an amount effective to reduce the sensory nerve activity of the hypersensitive tooth.
Claim 3
Dependent Claim
13 words
A method according to claim 1, wherein the subject is a human being.
Claim 4
Dependent Claim
17 words
A method according to claim 1, wherein the potassium bicarbonate is applied as part of a formulation.
Claim 5
Dependent Claim
20 words
A method according to claim 3, wherein the potassium bicarbonate is applied in a dentrifrice, mouthwash or chewing gum formulation.
Claim 6
Dependent Claim
33 words
A method according to claim 3, wherein the potassium bicarbonate formulation is an aqueous solution and the amount of potassium bicarbonate is from about 1.0 mg/ml to about 360 mg/ml of the formulation.
Claim 7
Dependent Claim
21 words
A method according to claim 5, wherein the amount is from about 5 mg/ml to about 250 mg/ml of the formulation.
Claim 8
Independent Claim
32 words
A method for desensitizing hypersensitive dentin which comprises applying to the surface of the exposed dentin potassium bicarbonate in an amount effective to reduce the sensory nerve activity of the hypersensitive dentin.
Claim 9
Independent Claim
32 words
A method for desensitizing hypersensitive dentin which comprises applying to the surface of the exposed dentin potassium bicarbonate in an amount effective to reduce the sensory nerve activity of the hypersensitive dentin.
Claim 10
Dependent Claim
13 words
A method according to claim 7, wherein the subject is a human being.
Claim 11
Dependent Claim
17 words
A method according to claim 7, wherein the potassium bicarbonate is applied as part of a formulation.
Claim 12
Dependent Claim
20 words
A method according to claim 9, wherein the potassium bicarbonate is applied in a dentifrice, mouthwash or chewing gum formulation.
Claim 13
Dependent Claim
33 words
A method according to claim 7, wherein the potassium bicarbonate formulation is an aqueous solution and the amount of potassium bicarbonate is from about 1.0 mg/ml to about 360 mg/ml of the formulation.
Claim 14
Dependent Claim
21 words
A method according to claim 11, wherein the amount is from about 5 mg/ml to about 250 mg/ml of the formulation.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |