US4563153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental composition containing pigment and methods of using the same
Assignee: Kulzer GmbH
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Filing: 1983-11-29
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Granted: 1986-01-07
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Expires: 2003-11-29
Abstract
Abstract A dental opaquing composition comprising (a) at least one polymerizable ester selected from esters of acrylic acid and methacrylic acid; (b) a photopolymerization catalyst; and (c) 30 to 90 percent by weight, based on the weight of said composition, of a pigment mixture consisting essentially of 50 to 66.6% by weight zirconium dioxide and 33.33 to 50% by weight of titanium dioxide. The present composition is useful in the making of metal-based crowns and bridges and to coat natural and false teeth.
Inventors
- 👤 Roland Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:52
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
61 words
A dental opaquing composition comprising (a) at least one polymerizable ester selected from esters of acrylic acid and methacrylic acid; (b) a photopolymerization catalyst; and (c) 30 to 90 percent by weight, based on the weight of said composition, of a pigment mixture consisting essentially of 50 to 66.67% by weight zirconium dioxide and 33.33 to 50% by weight titanium dioxide.
Claim 2
Dependent Claim
61 words
A dental opaquing composition comprising (a) at least one polymerizable ester selected from esters of acrylic acid and methacrylic acid; (b) a photopolymerization catalyst; and (c) 30 to 90 percent by weight, based on the weight of said composition, of a pigment mixture consisting essentially of 50 to 66.67% by weight zirconium dioxide and 33.33 to 50% by weight titanium dioxide.
Claim 3
Dependent Claim
29 words
The dental composition of claim 1, wherein at least one of said polymerizable esters is the reaction product of one of said acids and a mono or polyhydroxy compound.
Claim 4
Dependent Claim
25 words
The dental composition of claim 1, wherein said pigment mixture is present in an amount of 45 to 75 percent by weight of said composition.
Claim 5
Dependent Claim
17 words
The dental composition of claim 3, wherein the ratio of zirconium dioxide to titanium dioxide is 2:1.
Claim 6
Dependent Claim
17 words
The dental composition of claim 3, wherein the ratio of zirconium dioxide to titanium dioxide is 1:1.
Claim 7
Dependent Claim
22 words
The dental composition of claim 5, wherein zirconium dioxide and titanium dioxide are each present in an amount of 25% by weight.
Claim 8
Dependent Claim
18 words
The dental composition of claim 1, wherein the photopolymerization catalyst comprises a ketone or diketone and an amine.
Claim 9
Dependent Claim
12 words
The dental composition of claim 7, wherein said diketone is camphor quinone.
Claim 10
Dependent Claim
12 words
The dental composition of claim 8, wherein said amine is p-dimethylaminoethyl benzoate.
Claim 11
Dependent Claim
17 words
The dental composition of claim 1, wherein said acrylate or a urethane ester is a urethane methacrylate.
Claim 12
Dependent Claim
15 words
The dental composition of claim 1, wherein said ester is an aliphatic urethane methacrylate ester.
Claim 13
Dependent Claim
15 words
The dental composition of claim 2, wherein said methacrylic acid ester is a urethane methacrylate.
Claim 14
Dependent Claim
18 words
A dental composition of claim 1 comprising an aliphatic urethane dimethacrylate, butandiol dimethacrylate, camphor quinone, and p-dimethylaminoethyl benzoate.
Claim 15
Dependent Claim
21 words
The dental composition of claim 13, wherein titanium dioxide and zirconium dioxide are each in an amount of 25% by weight.
Claim 16
Dependent Claim
30 words
The dental composition of claim 13, wherein zirconium dioxide is present in an amount of 50% by weight and titanium dioxide is present in an amount of 25% by weight.
Claim 17
Dependent Claim
34 words
A method of opaquing the metal substrate for crown and bridge prosthesis, comprising applying to the metal substrate the dental opaquing composition of Claim 1 and irradiating said substrate with visible or ultraviolet light.
Claim 18
Dependent Claim
38 words
The dental composition of claim 7, wherein said ketone or diketone is present in an amount of from 0.1 to 5% by weight and said amine is present in an amount of from 0.1 to 5% by weight.
Claim 19
Dependent Claim
38 words
The dental composition of claim 17, wherein said ketone or diketone is present in an amount of from 0.5 to 2% by weight and said amine is present in an amount of from 0.5 to 3% by weight.
Claim 20
Dependent Claim
17 words
The dental composition of claim 1, wherein the ratio of zirconium dioxide to titanium dioxide is 2:1.
Claim 21
Dependent Claim
17 words
The dental composition of claim 1, wherein the ratio of zirconium dioxide to titanium dioxide is 1:1.
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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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |