US4491453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for restoring teeth with visible light curable compositions
Assignee: Dentsply Research and Development Corp
•
Filing: 1983-11-10
•
Granted: 1985-01-01
•
Expires: 2003-11-10
Abstract
Abstract Process for restoring teeth with visible light curable compositions having improved color stability are provided. According to a preferred embodiment, visible light hardenable restorative materials are formulated from a major proportion of inorganic filler and a minor proportion of a resin component comprising a binder resin selected from the group of acrylated polyesters, acrylated polyesters reacted with an isocyanate, and hydroxyalkyl acrylic esters reacted with an isocyanate, polymerizable acrylic diluent monomer in an amount sufficient to control the viscosity of the resin component, and a photosensitizing system comprising of from about 0.05% to about 0.50% by weight of the restorative material of an alpha diketone together with an amine reducing agent. American Dental Association color stability standards are met by these compositions.
Inventors
- 👤 Francis F. Koblitz
- 👤 Roy L. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:58
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/891; A61K6/893
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
176 words
A process of restoring teeth comprising applying to a prepared tooth a dental restorative composition hardenable by irradiation with visible light comprising a blend of: a major proportion of an inorganic filler, and a minor proportion of a resin component having a viscosity of between about 5,000 and 70,000 centiposes at 25° C. comprising: a binder resin comprising bis-GMA reacted with a diisocyanate, a polymerizable acrylic diluent monomer present in an amount sufficient to dissolve said binder resin and a photosensitizing system comprising: from about 0.05% to about 0.50% by weight of said resin component of a non-aromatic alpha diketone, and an amine reducing agent in an amount sufficient to improve the photocatalytic activity to visible light of said alpha diketone in said restorative composition, said inorganic filler and said resin component being present in relative amounts such that said restorative composition has a viscosity suitable for filling teeth, said composition being capable of passing American Dental Association Specification No. 27 for color stability, and exposing said composition to visible light to effect substantial polymerization thereof.
Claim 2
Dependent Claim
176 words
A process of restoring teeth comprising applying to a prepared tooth a dental restorative composition hardenable by irradiation with visible light comprising a blend of: a major proportion of an inorganic filler, and a minor proportion of a resin component having a viscosity of between about 5,000 and 70,000 centiposes at 25° C. comprising: a binder resin comprising bis-GMA reacted with a diisocyanate, a polymerizable acrylic diluent monomer present in an amount sufficient to dissolve said binder resin and a photosensitizing system comprising: from about 0.05% to about 0.50% by weight of said resin component of a non-aromatic alpha diketone, and an amine reducing agent in an amount sufficient to improve the photocatalytic activity to visible light of said alpha diketone in said restorative composition, said inorganic filler and said resin component being present in relative amounts such that said restorative composition has a viscosity suitable for filling teeth, said composition being capable of passing American Dental Association Specification No. 27 for color stability, and exposing said composition to visible light to effect substantial polymerization thereof.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said alpha diketone is either camphoroquinone or biacetyl.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said alpha said alpha diketone is camphoroquinone.
Claim 5
Dependent Claim
15 words
The process of claims 2 wherein said amine is either an N-alkyldialkanolamine or a trialkanolamine.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein said light is composed predominantly of wavelengths between about 4000 angstroms and about 5000 angstroms.
Claim 7
Dependent Claim
176 words
A process of restoring teeth comprising applying to a prepared tooth a visible light hardenable dental restorative composition comprising: a major proportion of an inorganic filler, and a minor proportion of a resin component having a viscosity of between about 5,000 and 70,000 centiposes at 25° C. comprising: a binder resin comprising bis-GMA reacted with a diisocyanate, a polymerizable acrylic diluent monomer present in an amount sufficient to dissolve said binder resin, and a photosensitizing system comprising: from about 0.05% to about 0.50% by weight of said component of a non-aromatic alpha diketone, and an amine reducing agent in an amount sufficient to improve the photocatalytic activity to visible light of said alpha diketone in said restorative composition, said inorganic filler and said resin component being present in relative amounts such that said restorative composition has a viscosity suitable for filling teeth, said composition being capable of passing American Dental Association Specification No. 27 for color stability, and irradiating said composition with visible light at least partially transmitted through at least one surface of the tooth.
Claim 8
Dependent Claim
176 words
A process of restoring teeth comprising applying to a prepared tooth a visible light hardenable dental restorative composition comprising: a major proportion of an inorganic filler, and a minor proportion of a resin component having a viscosity of between about 5,000 and 70,000 centiposes at 25° C. comprising: a binder resin comprising bis-GMA reacted with a diisocyanate, a polymerizable acrylic diluent monomer present in an amount sufficient to dissolve said binder resin, and a photosensitizing system comprising: from about 0.05% to about 0.50% by weight of said component of a non-aromatic alpha diketone, and an amine reducing agent in an amount sufficient to improve the photocatalytic activity to visible light of said alpha diketone in said restorative composition, said inorganic filler and said resin component being present in relative amounts such that said restorative composition has a viscosity suitable for filling teeth, said composition being capable of passing American Dental Association Specification No. 27 for color stability, and irradiating said composition with visible light at least partially transmitted through at least one surface of the tooth.
Claim 9
Dependent Claim
14 words
The process of claim 6 wherein said alpha dike-tone is either camphoroquinone or biacetyl.
Claim 10
Dependent Claim
11 words
The process of claim 6 wherein said alpha diketone is camphoroquinone.
Claim 11
Dependent Claim
15 words
The process of claims 7 wherein said amine is either an N-alkyldialkanolamine or a trialkanolamine.
References Cited (Backward Citations)
US3254411A
Cited
US3488269A
Cited
US3677920A
Cited
US3709866A
Cited
US3864133A
Cited
US4071424B1
Cited
US4071424A
Cited
US3825518A
Cited
US3759809A
Cited
US4089763A
Cited
US3954584A
Cited
US4089762A
Cited
US3968181A
Cited
US4065587A
Cited
US4077859A
Cited
US4227979A
Cited
US4153776A
Cited
EP0012535A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |