US4850872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restoration
Assignee: Individual
•
Filing: 1988-04-13
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Granted: 1989-07-25
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Expires: 2008-04-13
Abstract
Abstract The present invention relates to compositions and methods of use of materials in dental restoration, more specifically to the combined use of ethylenediaminotetraacetic acid (EDTA) and sodium hypochlorite to prepare a mechanically prepared tooth for crown replacement or for filling a cavity.
Inventors
- 👤 Melvin Goldman
- 👤 Daniel Nathanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/30; A61C5/00; A61C5/30; A61C5/35; A61C5/40
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
112 words
Method for restoring a tooth comprising: preparing the tooth to accept a prosthesis, preparing the tooth to accept a filling, flushing said prepared area with a chelating agent selected from the group consisting of citric acid and ethylenediaminetetraacetic acid, then flushing said prepared area with a solvent selected from the group consisting of sodum hypochlorite, surface active agents and emulsifiers, which solvent dissolves, dispenses or otherwise chemically removes organic debris, placing a low-viscosity luting agent in said prepared area, placing said filling in said prepared area, contacting said filling and the dentin of the tooth with a low-viscosity luting agent, forming finish structure around the exposed filling, and installing the finish structure.
Claim 2
Dependent Claim
112 words
Method for restoring a tooth comprising: preparing the tooth to accept a prosthesis, preparing the tooth to accept a filling, flushing said prepared area with a chelating agent selected from the group consisting of citric acid and ethylenediaminetetraacetic acid, then flushing said prepared area with a solvent selected from the group consisting of sodum hypochlorite, surface active agents and emulsifiers, which solvent dissolves, dispenses or otherwise chemically removes organic debris, placing a low-viscosity luting agent in said prepared area, placing said filling in said prepared area, contacting said filling and the dentin of the tooth with a low-viscosity luting agent, forming finish structure around the exposed filling, and installing the finish structure.
Claim 3
Dependent Claim
11 words
Method of claim 1 wherein said chelating agent is ethylenediaminetetraacetic acid.
Claim 4
Dependent Claim
11 words
Method of claim 1 wherein said organic solvent is sodium hypochlorite.
Claim 5
Dependent Claim
18 words
Method of claim 2 wherein said chelating agent comprises about 1 to 50% by weight of ethylenediaminetetraacetic acid.
Claim 6
Dependent Claim
18 words
Method of claim 2 wherein the chelating agent comprises about 10 to 16% by weight of ethylenediaminetetraacetic acid.
Claim 7
Dependent Claim
17 words
Method of claim 3 wherein said (organic) solvent is about 1 to 20% by weight sodium hydrochlorite.
Claim 8
Dependent Claim
16 words
Method of claim 3 wherein said (organic) solvent is about 4-6% by weight of sodium hypocholrite.
Claim 9
Dependent Claim
10 words
Method of claim 1 wherein said filling comprises insulating material.
Claim 10
Dependent Claim
11 words
Method of claim 1 wherein said luting agent is Bis-GMA resin.
Claim 11
Dependent Claim
15 words
Method of claim 1 wherein said preparation is accompanied by flushing with an irrigation solution.
Claim 12
Dependent Claim
12 words
Method of claim 10 wherein said irrigation solution is an organic solvent.
Claim 13
Dependent Claim
69 words
Method of using a restoration filler material that comprises preparing the area of a tooth, flushing said prepared area with a chelating agent selected from the group consisting of citric acid and ethylenediaminetetraacetic acid followed by a solvent selected from the group consisting of sodium hypochlorite surface, active agents and emulsifiers which dissolves, dispenses or otherwise chemically removes organic debris, and placing said filler material in said flushed area.
Claim 14
Dependent Claim
69 words
Method of using a restoration filler material that comprises preparing the area of a tooth, flushing said prepared area with a chelating agent selected from the group consisting of citric acid and ethylenediaminetetraacetic acid followed by a solvent selected from the group consisting of sodium hypochlorite surface, active agents and emulsifiers which dissolves, dispenses or otherwise chemically removes organic debris, and placing said filler material in said flushed area.
Claim 15
Dependent Claim
40 words
Method of restoring a tooth having a caries cavity, comprising: (a) mechanically cleaning the surface of the cavity (b) flushing said cleaned surface with a chelating agent followed by an organic solvent, and placing filler material in said flushed area.
Claim 16
Dependent Claim
40 words
Method of restoring a tooth having a caries cavity, comprising: (a) mechanically cleaning the surface of the cavity (b) flushing said cleaned surface with a chelating agent followed by an organic solvent, and placing filler material in said flushed area.
Claim 17
Dependent Claim
10 words
Method of claim 13, wherein said filler material is Bis-GMA.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |