US4375967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental composition containing X-ray opaque material
Assignee: Kulzer GmbH
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Filing: 1981-08-24
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Granted: 1983-03-08
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Expires: 2001-08-24
Abstract
Abstract An improved dental composition which is opaque to X-rays comprising a polymerizable matrix and inorganic filler. The inorganic filler are formed of particles of zeolitic alumino-silicate of at least one metal selected from the group consisting of calcium, strontium, barium, lanthanum, rare earth metal having an atomic number of 58-71, tantalum and hafnium. The invention also provides dental prosthetic appliances found from said dental compositions.
Inventors
- 👤 Roland Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:49
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
118 words
A dental composition which when polymerized is (i) opaque to X-ray radiation and which (ii) can be polished to a high gloss comprising a polymerizable binder which polymerizes to form a polymerized dental composition and contains fine particles of an inorganic filler which imparts X-ray opacity to said composition, said inorganic filler comprising a zeolitic alumino silicate of at least one metal selected from the group consisting of calcium, strontium, barium, lanthanum, rare earth metals having atomic numbers from 58-71, tantalum, and hafnium, said polymerizable binder is at least one binder selected from the group consisting of the esters of acrylic acid with mono- and polyhydric alcohols, urethane-acrylates, urethane-methacrylates and the reaction product of glycidyl-methacrylate and bisphenol A.
Claim 2
Dependent Claim
118 words
A dental composition which when polymerized is (i) opaque to X-ray radiation and which (ii) can be polished to a high gloss comprising a polymerizable binder which polymerizes to form a polymerized dental composition and contains fine particles of an inorganic filler which imparts X-ray opacity to said composition, said inorganic filler comprising a zeolitic alumino silicate of at least one metal selected from the group consisting of calcium, strontium, barium, lanthanum, rare earth metals having atomic numbers from 58-71, tantalum, and hafnium, said polymerizable binder is at least one binder selected from the group consisting of the esters of acrylic acid with mono- and polyhydric alcohols, urethane-acrylates, urethane-methacrylates and the reaction product of glycidyl-methacrylate and bisphenol A.
Claim 3
Dependent Claim
18 words
The composition of claim 1 containing said zeolitic alumino-silicate in an amount between 30% and 85% by weight.
Claim 4
Dependent Claim
25 words
The composition of claim 2 wherein said zeolitic alumino-silicate is in the form of particles having a size of between about 0.05 and 200 μm.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein said zeolitic alumino-silicate has been treated with an organic silane.
Claim 6
Dependent Claim
16 words
The composition of claim 3 wherein said zeolitic alumino-silicate has been treated with an organic silane.
Claim 7
Dependent Claim
21 words
The composition of any one of claims 1, 2, 3, 4, or 5 wherein said zeolitic alumino-silicate is a cerium alumino-silicate.
Claim 8
Dependent Claim
27 words
A prosthetic dental appliance comprising a shaped body portion which is opaque to X-rays which is produced by shaping and curing the dental composition of claim 1.
Claim 9
Dependent Claim
27 words
A prosthetic dental appliance comprising a shaped body portion which is opaque to X-rays which is produced by shaping and curing the dental composition of claim 6.
Claim 10
Dependent Claim
33 words
The composition of claim 6, wherein said polymerizable binder is at least one binder selected from the group consisting of the esters of acrylic acid with mono- and polyhydric alcohols, urethane-acrylates, and urethane-methacrylates.
Claim 11
Dependent Claim
19 words
The composition of claim 6, wherein said polymerizable binder is the urethane-methacrylate obtained by reacting 2,4,4-trimethylhexamethylenediisocyanate, hydroxyethylmethacrylate, and triethyleneglycoldimethacrylate.
Claim 12
Dependent Claim
18 words
The composition of claim 6, wherein said polymerizable binder is the reaction product of glycidylmethacrylate and bisphenol A.
Claim 13
Dependent Claim
27 words
A prosthetic dental appliance comprising a shaped body portion which is opaque to X-rays which is produced by shaping and curing the dental composition of claim 9.
Claim 14
Dependent Claim
27 words
A prosthetic dental appliance comprising a shaped body portion which is opaque to X-rays which is produced by shaping and curing the dental composition of claim 10.
Claim 15
Dependent Claim
27 words
A prosthetic dental appliance comprising a shaped body portion which is opaque to X-rays which is produced by shaping and curing the dental composition of claim 11.
Claim 16
Dependent Claim
26 words
The composition of claim 10 wherein said polymerizable binder is a mixture of 60% by weight of said urethane-methacrylate and 40% by weight of said triethyleneglycoldimethacrylate.
References Cited (Backward Citations)
US2882243A
Cited
US3036980A
Cited
US3036984A
Cited
US3066112A
Cited
US3539526A
Cited
US3799905A
Cited
US3721644A
Cited
US4028325A
Cited
US4029632A
Cited
US3959212A
Cited
US4220582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-07 | 1986-09-06 | 1987-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-07 | 1990-09-06 | 1991-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-07 | 1994-09-06 | 1995-03-08 | $7700.00 | Window Closed / Lapsed |