US5034433A
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US
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Composite dental cement composition containing titanium
Assignee: Essential Dental Systems Inc
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Filing: 1990-04-10
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Granted: 1991-07-23
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Expires: 2010-04-10
Abstract
Abstract A composite dental cement composition that is suitable for application with dental posts for either post insertion in a tooth or during core formation is provided. The cement composition includes a polymer matrix in an amount between about 15 and 50 weight percent, a filler in an amount between about 35 and 80 weight percent, and titanium in an amount between about 1 and 15 weight percent. The titanium ingredient chemically interacts with the polymer matrix in order to increase compressive strength of the cement composition. A fluoride compound may be added in order to substantially eliminate caries and further tooth decay.
Inventors
- 👤 Brett I. Cohen
- 👤 Allan S. Leutsch
- 👤 Brahma D. Sharma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:27
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/884; A61K6/887; A61K6/891
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
62 words
A composite dental cement composition comprising: a polymer matrix in an amount between about 10 and 50 weight percent; a filler in an amount between about 35 and 80 weight percent; and titanium powder in an amount between about 2 and 5 weight percent, wherein the titanium powder includes silinated titanium powder comprising at least 2% by weight of the cement composition.
Claim 2
Dependent Claim
62 words
A composite dental cement composition comprising: a polymer matrix in an amount between about 10 and 50 weight percent; a filler in an amount between about 35 and 80 weight percent; and titanium powder in an amount between about 2 and 5 weight percent, wherein the titanium powder includes silinated titanium powder comprising at least 2% by weight of the cement composition.
Claim 3
Dependent Claim
13 words
The composition of claim 1, wherein the polymer matrix comprises an epoxy matrix.
Claim 4
Dependent Claim
13 words
The composition of claim 2, wherein the epoxy matrix comprises an acrylic matrix.
Claim 5
Dependent Claim
15 words
The composition of claim 3, wherein the acrylic matrix is formed from monomers of methacrylate.
Claim 6
Dependent Claim
52 words
The composition of claim 4, wherein the monomers of methacrylate are selected from the group of monomers of dimethacrylate including bisphenol A-glycidyl methacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, ethylene glycol dimethacrylate, diethyleneglycol dimethacrylate, butanediol dimethacrylate, isobisphenol A-glycidyl methacrylate, trimethylolpropane dimethacrylate, hexanediolethylene dimethacrylate, neopentyl glycol dimethacrylate, bisphenol A-ethoxylated dimethacrylate and bisphenol A-dimethacrylate.
Claim 7
Dependent Claim
32 words
The composition of claim 5, wherein the monomer of dimethacrylate is bisphenol A-glycidyl methacrylate in an amount between about 5 and 50 weight percent based on the total weight of the cement.
Claim 8
Dependent Claim
47 words
The composition of claim 1, wherein the filler is selected from the group including quartz, silicon dioxide, fumed silicon dioxide, aluminum dioxide, titanium dioxide, zirconium dioxide, silicas, glass, graphite fibers, boron fibers, barium glass, alumina silicates, boro silicate glass, glass powders, hydroxy apatite, wood, micas and asbestos.
Claim 9
Dependent Claim
16 words
The composition of claim 1, wherein at least some of the titanium is not chemically treated.
Claim 10
Dependent Claim
34 words
The composition of claim 1, wherein the silanated titanium powder is prepared from a silane selected from the group including gamma-methacryloxy propyltrimethoxysilane, gamma-methacryloxy propyl-tris-(2-methoxyethyoxy) silane, vinyl trichlorosilane, vinyl triethyoxysilane, vinyl trimethoxysilane and vinyl triacetoxysilane.
Claim 11
Dependent Claim
20 words
The composition of claim 1, wherein the titanium powder has a particle size of between about 1 and 30 microns.
Claim 12
Dependent Claim
17 words
The composition of claim 3, wherein the titanium powder has a purity of at least a 98%.
Claim 13
Dependent Claim
19 words
The composition of claim 1, further including a fluoride in an amount between about 0.5 and 6 weight percent.
Claim 14
Dependent Claim
28 words
The composition of claim 12, wherein the fluoride is selected from the group including sodium fluoride, tin fluoride, ytterbium fluoride, an amine fluoride and an acidulated phosphate fluoride.
Claim 15
Independent Claim
166 words
A system for preparing a composite dental cement composition comprising: a catalyst component including a catalyst in an amount between about 0.2 and 2.0 weight percent, at least one epoxy monomer in an amount between about 15 and 50 weight percent and a filler in an amount between about 40 and 80 weight percent; a base component comprising a base in an amount between about 0.2 and 1.5 weight percent, at least one epoxy monomer in an amount between about 20 and 50 weight percent and a filler in an amount between about 45 and 85 weight percent; and titanium powder in an amount between about 2 and 5 weight percent based on the combined amount of catalyst, base and titanium powder; wherein the titanium powder includes silinated titanium powder comprising at least 2% by weight of the combined amount of catalyst, base and titanium powder; wherein the catalyst component, base component and titanium powder are combined in order to form the composite dental cement composition.
Claim 16
Independent Claim
166 words
A system for preparing a composite dental cement composition comprising: a catalyst component including a catalyst in an amount between about 0.2 and 2.0 weight percent, at least one epoxy monomer in an amount between about 15 and 50 weight percent and a filler in an amount between about 40 and 80 weight percent; a base component comprising a base in an amount between about 0.2 and 1.5 weight percent, at least one epoxy monomer in an amount between about 20 and 50 weight percent and a filler in an amount between about 45 and 85 weight percent; and titanium powder in an amount between about 2 and 5 weight percent based on the combined amount of catalyst, base and titanium powder; wherein the titanium powder includes silinated titanium powder comprising at least 2% by weight of the combined amount of catalyst, base and titanium powder; wherein the catalyst component, base component and titanium powder are combined in order to form the composite dental cement composition.
Claim 17
Dependent Claim
17 words
The system of claim 14, wherein the catalyst of the catalyst component comprises a free radical source.
Claim 18
Dependent Claim
14 words
The system of claim 15, wherein the free radical source comprises an organic peroxide.
Claim 19
Dependent Claim
41 words
The system of claim 16, wherein the organic peroxide is selected from the group including benzoyl peroxide, acetyl peroxide, parachlorobenzoyl peroxide, cumyl peroxide, t-butyl peroxide, lauroyl peroxide, t-butyl hydroperoxide, methylethyl ketone peroxides, t-butyl peroxy-benzoate, 2,5 dimethylhexane-2,5 dihydroxy peroxide and t-cumyl hydroperoxide.
Claim 20
Dependent Claim
12 words
The system of claim 17, wherein the organic peroxide is benzoyl peroxide.
Claim 21
Dependent Claim
19 words
The system of claim 14, wherein said at least one epoxy monomer comprises at least one monomer of methacrylate.
Claim 22
Dependent Claim
17 words
The system of claim 18, wherein the at least one monomer of methacrylate is bisphenol A-glycidyl methacrylate.
Claim 23
Dependent Claim
12 words
The system of claim 14, wherein the base comprises an amine compound.
Claim 24
Dependent Claim
58 words
The system of claim 21, wherein the amine compound is selected from the group including toludine compounds, propylamine, butyl N-butyl amine, pentylaamine, hexylamine, dimethylamine, diethyleneamine, dipropylamine, di-n-butylamine, dipentylamine, trimethylamine, triethylamine, tripropylamine, tri-n-butyl amine, trimethyl amine, long chain fatty amine, tri-n-butylamine, tripentylamine, 4-methylaniline, N-N-bis-(2-hydroxyethyl)-3,5-dimethylaniline, N-methyl-N(2-hydroxyethyl)-4-methylaniline, long chain fatty amines, diamine, trimethylene diamine, tetramethylene diamine, pentamethylene diamine and hexamethylene diamine.
Claim 25
Dependent Claim
13 words
The system of claim 22, wherein the amine compound comprises a toluidine compound.
Claim 26
Dependent Claim
13 words
The system of claim 23, wherein said toluidine compound comprises NN' dihydroxyethyl toluidine.
Claim 27
Dependent Claim
34 words
The system of claim 14, wherein the silanated titanium powder is prepared from a silane selected from the group including gamma-methacryloxy propyltrimethoxysilane, gamma-methacryloxy propyl-tris-(2-methoxyethyoxy) silane, vinyl trichlorosilane, vinyl triethyoxysilane, vinyl trimethoxysilane and vinyl triacetoxysilane.
Claim 28
Dependent Claim
20 words
The system of claim 14, wherein the titanium powder has a particle size of between about 1 and 30 microns.
Claim 29
Dependent Claim
16 words
The system of claim 26, wherein the titanium powder has a purity of at least 98%.
Claim 30
Dependent Claim
25 words
The system of claim 14, wherein the titanium powder is added to the catalyst component prior to combining the catalyst component with the base component.
Claim 31
Dependent Claim
25 words
The system of claim 14, wherein the titanium powder is added to the base component prior to combining the catalyst component with the base component.
Claim 32
Dependent Claim
51 words
A composite dental cement composition comprising: a polymer matrix in an amount between about 15 and 50 weight percent; a filler in an amount between about 35 and 80 weight percent; and titanium powder that has been chemically treated by silination in an amount between about 2 and 5 weight percent.
Claim 33
Dependent Claim
51 words
A composite dental cement composition comprising: a polymer matrix in an amount between about 15 and 50 weight percent; a filler in an amount between about 35 and 80 weight percent; and titanium powder that has been chemically treated by silination in an amount between about 2 and 5 weight percent.
References Cited (Backward Citations)
US3066112A
Cited
US3539533A
Cited
US3926906A
Cited
US3997504A
Cited
US3882600A
Cited
US3801344A
Cited
US3808170A
Cited
US4107845A
Cited
US4051598A
Cited
US3991008A
Cited
US4150012A
Cited
US4141144A
Cited
US4117595A
Cited
US4197234A
Cited
US4188317A
Cited
US4327014A
Cited
US4440878A
Cited
US4454258A
Cited
US4261879A
Cited
US4695251A
Cited
US4347174A
Cited
US4386912A
Cited
US4383826A
Cited
US4407984A
Cited
US4801528A
Cited
US4772325A
Cited
US4437836A
Cited
US4431421A
Cited
US4449938A
Cited
US4542539A
Cited
US4552906A
Cited
US4610631A
Cited
US4648845A
Cited
US4918136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |