Patent US5084491A successfully refreshed from Google Patents.
US5084491A
Expired / Lapsed
US
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Reinforcing glass ionomer dental filling material with stainless steel, or metals thereof
Assignee: Ohio University
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Filing: 1989-03-16
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Granted: 1992-01-28
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Expires: 2009-03-16
Abstract
Abstract The invention relates to dental filling materials comprising stainless steel filler, a polymeric binder, and glass filler. Tensile strength, compressive strength, dentinal bonding and enamel bonding of the dental filling materials are improved relative to commercial glass ionomer cements without stainless steel.
Inventors
- 👤 Ronald E. Kerby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:15
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/50; A61K6/58; A61K6/30; A61K6/80; A61K6/84; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
74 words
A method of preparing a dental filling material comprising (a) treating stainless steel powder of spheroidal particle size ranging from about 5 microns to about 45 microns with an acid, or aqueous solution thereof; and (b) combining the stainless steel powder and glass powder of a particle size less than about 200 microns and an acidic polymeric binder consisting of one or more curable organic polymeric materials, whereby a dental filling material is obtained.
Claim 2
Independent Claim
74 words
A method of preparing a dental filling material comprising (a) treating stainless steel powder of spheroidal particle size ranging from about 5 microns to about 45 microns with an acid, or aqueous solution thereof; and (b) combining the stainless steel powder and glass powder of a particle size less than about 200 microns and an acidic polymeric binder consisting of one or more curable organic polymeric materials, whereby a dental filling material is obtained.
Claim 3
Dependent Claim
33 words
The method of claim 1 further comprising the steps of filtering the acid treated stainless steel powder to separate the stainless steel powder from the acid, and washing the filtered stainless steel powder.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein the acid used to treat the stainless steel powder is selected from the group consisting of hydrochloric acid, sulfuric acid, acetic acid, propionic acid, phosphoric acid, hydrofluoric acid, perchloric acid, and nitric acid.
Claim 5
Dependent Claim
38 words
The method of claim 1 wherein the stainless steel is treated with the acid in step a) for a period of time sufficient to activate the surface of the stainless steel toward increased bonding with the polymeric binder.
Claim 6
Dependent Claim
13 words
The method of claim 2, wherein the stainless steel is washed with water.
Claim 7
Dependent Claim
14 words
The method of claim 2 wherein the stainless steel is washed with anhydrous alcohol.
Claim 8
Dependent Claim
11 words
The method of claim 6 wherein the anhydrous alcohol is methanol.
Claim 9
Dependent Claim
89 words
A dental filling material comprising: an acidic polymeric binder, glass filler, stainless steel powder filler, and one or more additives selected from the group consisting of cure enhancers, pigments, synthetic enamel, organic acids, inorganic acids, amines, adhesion promoters, oxidation inhibitors, photocurable resins, photoinitiators, camphoroquinone, diketones, benzoyl peroxide, ethanolamine, triethanolamine, tannic acid, ferric chloride, acrylamide, acrylonitrile, vinyl chloride, allyl chloride, vinyl acetate, 2-hydroxyethyl methacrylate, sodium tripolyphosphate, mineralizing agents, dodicin, calcium hydroxyapatite, gold alloys, silver alloys, precious metals, non-precious metals, porcelain materials, and materials for coating the stainless steel powder filler.
Claim 10
Dependent Claim
89 words
A dental filling material comprising: an acidic polymeric binder, glass filler, stainless steel powder filler, and one or more additives selected from the group consisting of cure enhancers, pigments, synthetic enamel, organic acids, inorganic acids, amines, adhesion promoters, oxidation inhibitors, photocurable resins, photoinitiators, camphoroquinone, diketones, benzoyl peroxide, ethanolamine, triethanolamine, tannic acid, ferric chloride, acrylamide, acrylonitrile, vinyl chloride, allyl chloride, vinyl acetate, 2-hydroxyethyl methacrylate, sodium tripolyphosphate, mineralizing agents, dodicin, calcium hydroxyapatite, gold alloys, silver alloys, precious metals, non-precious metals, porcelain materials, and materials for coating the stainless steel powder filler.
Claim 11
Dependent Claim
25 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is surface treated.
Claim 12
Dependent Claim
25 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is surface treated.
Claim 13
Dependent Claim
46 words
The dental filling material of claim 9 wherein the surface treatment is chemical or thermal treatment of the stainless steel powder whereby the bonding of the stainless steel to the polymeric binder is increased relative to the bonding achieved in the absence of said surface treatment.
Claim 14
Dependent Claim
32 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler comprises base metal particles which have been stainless steel coated.
Claim 15
Dependent Claim
32 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler comprises base metal particles which have been stainless steel coated.
Claim 16
Dependent Claim
31 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler comprises base metal particles which have been chromium plated.
Claim 17
Dependent Claim
31 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler comprises base metal particles which have been chromium plated.
Claim 18
Dependent Claim
44 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, further comprising one or more additives selected from the group consisting of precious metals, non-precious metals, and porcelain materials wherein the stainless steel is sintered with the additive.
Claim 19
Dependent Claim
44 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, further comprising one or more additives selected from the group consisting of precious metals, non-precious metals, and porcelain materials wherein the stainless steel is sintered with the additive.
Claim 20
Dependent Claim
28 words
A dental filing material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is mixed with a precious metal.
Claim 21
Dependent Claim
28 words
A dental filing material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is mixed with a precious metal.
Claim 22
Dependent Claim
28 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is mixed with a non-precious metal.
Claim 23
Dependent Claim
28 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is mixed with a non-precious metal.
Claim 24
Dependent Claim
48 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is sintered with glass ionomer powder, or combined with a sintered or non-sintered mixture of sintered and non-sintered glass ionomer powder and stainless steel powder filler.
Claim 25
Dependent Claim
48 words
A dental filling material comprising an organic polymeric binder, glass filler, and stainless steel powder filler, wherein the stainless steel powder filler is sintered with glass ionomer powder, or combined with a sintered or non-sintered mixture of sintered and non-sintered glass ionomer powder and stainless steel powder filler.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |