US4544359A
Expired / Lapsed
US
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Dental restorative material
Assignee: Jeneric Industries Inc
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Filing: 1984-12-03
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Granted: 1985-10-01
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Expires: 2004-12-03
Abstract
Abstract In a dental restorative material comprising 20-30% by weight of a visible light polymerizable methacrylic ester monomeric system, from about 65-79% by weight of an inorganic filler and from about 1-5% by weight of collidal fumed silica; said inorganic filler having an average particle size diameter ranging from about 0.5 to 5 microns and said collidal fumed silica having an average particle size ranging from about 0.01 to about 0.05 micron, the improvement comprising subjecting the filler to a series of milling steps comprising (1) wet milling in aqueous medium having a pH of 5-7; (2) surface etch milling in an aqueous etchant medium and (3) a silanizing milling in a silane solution.
Inventors
- 👤 Samuel Waknine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:05
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/77; A61K6/15; A61K6/17; A61K6/76
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
113 words
In a dental restorative material comprising 20-30% by weight of a visible light polymerizable methacrylic ester monomeric system, from about 65-79% by weight of an inorganic filler and from about 1-5% by weight of collidal fumed silica; said inorganic filler having an average particle size diameter ranging from about 0.5 to 5 microns and said collidal fumed silica having an average particle size ranging from about 0.01 to about 0.05 micron, the improvement comprising subjecting the filler to a series of milling steps comprising (1) wet milling in aqueous medium having a pH of 5-7; (2) surface etch milling in an aqueous etchant medium and (3) a silanizing milling in a silane solution.
Claim 2
Dependent Claim
113 words
In a dental restorative material comprising 20-30% by weight of a visible light polymerizable methacrylic ester monomeric system, from about 65-79% by weight of an inorganic filler and from about 1-5% by weight of collidal fumed silica; said inorganic filler having an average particle size diameter ranging from about 0.5 to 5 microns and said collidal fumed silica having an average particle size ranging from about 0.01 to about 0.05 micron, the improvement comprising subjecting the filler to a series of milling steps comprising (1) wet milling in aqueous medium having a pH of 5-7; (2) surface etch milling in an aqueous etchant medium and (3) a silanizing milling in a silane solution.
Claim 3
Dependent Claim
40 words
A dental restorative material as defined in claim 1 wherein the inorganic filler comprises a mixture of from about 5-20% by weight of borosilicate glass and from about 80-95% by weight of an alkali metal or alkaline earth metal silicate.
Claim 4
Dependent Claim
21 words
A dental restorative material as defined in claim 2 wherein the alkali metal or alkaline earth metal silicate is barium silicate.
Claim 5
Dependent Claim
36 words
A dental restorative material as defined in claim 1 wherein the inorganic filler is prepared by wet milling, milling in a buffered aqueous etchant medium at a pH ranging from about 10-13 and a silanizing milling.
Claim 6
Dependent Claim
20 words
A dental restorative material as defined in claim 1 wherein the aqueous etchant medium has a pH of about 12.
Claim 7
Dependent Claim
21 words
A dental restorative material as defined in claim 1 wherein the inorganic filler contains from about 1.5-6% weight silane coupled thereto.
Claim 8
Dependent Claim
37 words
A dental restorative material as defined in claim 1 wherein the visible light polymerizable methacrylic ester monomeric system comprises a cross-linking methacrylate monomer, a co-monomeric methacrylate diluent, a visible light activated polymerization initiator, and a polymerization accelerator.
Claim 9
Dependent Claim
23 words
A dental restorative material as defined in claim 7 wherein the visible light polymerizable methacrylic ester monomeric system additionally contains an ultraviolet absorber.
Claim 10
Dependent Claim
24 words
A dental restorative material as defined in claim 8 wherein the cross-linking methacrylate monomer is the monomeric reaction product of 4,4'-isopropylidenediphenol and glycidyl methacryalte.
Claim 11
Dependent Claim
25 words
A dental restorative material as defined in claim 8 wherein the diluent within the visible light polymerizable methacrylic ester monomeric system comprises triethylene glycol dimethacrylate.
Claim 12
Dependent Claim
27 words
A dental restorative material as defined in claim 8 wherein the visible light polymerizable methacrylic ester monomeric system contains a visible light activated polymerization initiator comprising dl-camphoroquinone.
Claim 13
Dependent Claim
24 words
A dental restorative material as defined in claim 8 wherein the visible light polymerizable methacrylic ester monomeric system contains a polymerization accelerator comprising diethylaminoethylmethacrylate.
Claim 14
Dependent Claim
23 words
A dental restorative material as defined in claim 8 wherein the visible light polymerizable methacrylic ester monomeric system contains a benzotriazole ultraviolet absorber.
Claim 15
Dependent Claim
22 words
A dental restorative material as defined in claim 8 which is additionally tinted by incorporating therein a dye, pigment or lakolene preparation.
Claim 16
Dependent Claim
29 words
A dental restorative material as defined in claim 1 wherein the aqueous etchant medium is an aqueous solution of a base maintained at a pH ranging from about 10-13.
Claim 17
Dependent Claim
44 words
A dental restorative material as defined in claim 1 wherein the inorganic filler comprises a mixture of about 89% barium silicate and about 11% borosilicate glass having about 2.5% silane coupled thereto, said inorganic filler having an average particle size of about 2.3 microns.
Claim 18
Dependent Claim
47 words
A dental restorative material as defined in claim 16 wherein 74% by weight of said inorganic filler and 2% by weight of colloidal fumed silica having an average particle size of about 0.04 microns are admixed with 24% by weight of a monomeric matrix composition comprising about
Claim 19
Dependent Claim
31 words
32 wt. % of the monomeric reaction product of 4,4'-isopropylidendiphenol and glycidyl methacrylate 44.30 wt. % triethylene glycol dimethacrylate 0.99 wt. % benzotriazole 0.16 wt. % dl-camphorquinone 0.23 wt. % diethylamino-ethylmethacrylate.
Claim 20
Dependent Claim
31 words
32 wt. % of the monomeric reaction product of 4,4'-isopropylidendiphenol and glycidyl methacrylate 44.30 wt. % triethylene glycol dimethacrylate 0.99 wt. % benzotriazole 0.16 wt. % dl-camphorquinone 0.23 wt. % diethylamino-ethylmethacrylate.
Claim 21
Dependent Claim
42 words
A dental restorative material as defined in claim 1 wherein the inorganic filler comprises a mixture of 80-85% barium silicate and 15-20% borosilicate glass having about 2.0-2.5% silane coupled threto, said inorganic filler having an average particle size of about 0.90 microns.
Claim 22
Dependent Claim
78 words
A dental restorative material as defined in claim 18 wherein 75% by weight of said inorganic filler and 2% by weight of colloidal fumed silica having an average particle size of about 0.04 micron are admixed with 23% by weight of a monomeric matrix composition comprising about 54.27 wt. % of the monomeric reaction product of 4,4'-isopropylidenediphenol and glycidyl methacrylate 44.30 wt. % triethylene glycol dimethacrylate 0.99 wt. % benzotriazole 0.16 wt. % dl-camphorquinone 0.28 wt. % diethylamino-ethylmethacrylate.
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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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |