US5151453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-curable ionomer dental cement
Assignee: Den Mat Holdings LLC
•
Filing: 1990-08-01
•
Granted: 1992-09-29
•
Expires: 2010-08-01
Abstract
Abstract Two-part dental cement systems based on glass ionomers which are curable on exposure to light. The dental cement systems comprise a two-part blend of sodium N(p-tolyl)glycine-glycidyl methacrylate (Na NTG-GMA) and pyromellitic dianhydride-methyl methacrylate (PMDM) resins and glass ionomers.
Inventors
- 👤 Robert L. Ibsen
- 👤 Donald R. Pacropis
- 👤 William R. Glace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:55
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A two-part dental cement system composed of a. a powder comprising: 1. Alumina fluoride silicate glass 2. Barium tungstate 3. Zinc oxide 4. Equilibrium mixture of Sodium N(p-tolyl)glycine-glycidyl methacrylate (Na NTG-GMA) with NTG-GMA 5. Ethyl 4-dimethylamino benzoate; and, b. a liquid comprising 6. Ethoxylated bisphenol A dimethacrylate 7. 2-hydroxyethyl methacrylate 8. pyromellitic dianhydride-methyl methacrylate (PMDM) 9. Polyacrylic acid 10. 2,3-bornanedione 11. Butylated hydroxytoluene 12. Benzoyl peroxide 13. Tartaric acid powder (a) and liquid (b) being stored separately and brought into use by mixing them in (a)/(b) weight ratios of 2/1-1/1.
Claim 2
Dependent Claim
90 words
A two-part dental cement system composed of a. a powder comprising: 1. Alumina fluoride silicate glass 2. Barium tungstate 3. Zinc oxide 4. Equilibrium mixture of Sodium N(p-tolyl)glycine-glycidyl methacrylate (Na NTG-GMA) with NTG-GMA 5. Ethyl 4-dimethylamino benzoate; and, b. a liquid comprising 6. Ethoxylated bisphenol A dimethacrylate 7. 2-hydroxyethyl methacrylate 8. pyromellitic dianhydride-methyl methacrylate (PMDM) 9. Polyacrylic acid 10. 2,3-bornanedione 11. Butylated hydroxytoluene 12. Benzoyl peroxide 13. Tartaric acid powder (a) and liquid (b) being stored separately and brought into use by mixing them in (a)/(b) weight ratios of 2/1-1/1.
Claim 3
Dependent Claim
41 words
The system of claim 1 in which the components are present in the following concentrations: 1. 65-90% 2. 0-15% 3. 0.0-10% 4. 5-10% 5. 0.0-2% 6. 50-80% 7. 10-25% 8. 2.5-17% 9. 1-5% 10. 0.05-0.25% 11. 0.01-0.08% 12. 0.005-0.05% 13. 0.10-1%.
Claim 4
Dependent Claim
41 words
The system of claim 1 in which the components are present in the following concentrations: 1. 82% 2. 7% 3. 2% 4. 8% 5. 1% 6. 73.71% 7. 18% 8. 5% 9. 3.1% 10. 0.14% 11. 0.03% 12. 0.02% 13. 0.12%.
Claim 5
Dependent Claim
96 words
A two-part dental cement system composed of: a. a paste comprising: 1. Alumina fluoride silica glass 2. 2-hydroxyethyl methacrylate 3. Ethoxylated bisphenol A dimethacrylate 4. Equilibrium mixture of Na NTG-GMA with NTG-GMA 5. Zinc oxide 6. Barium tungstate 7. Ethyl 4-dimethylamino benzoate; and, b. a paste comprising: 8. Alumina fluoride silica glass 9. 2-hydroxyethyl methacrylate 10. Ethoxylated bisphenol A dimethacrylate 11. 2,3-bornanediol 12. Butylated hydroxytoluene 13. Benzoyl peroxide 14. Polyacrylic acid 15. pMDM paste (a) and paste (b) being stored separately and brought into use by mixing them in an (a)/(b) weight ratio of about 1/1.
Claim 6
Dependent Claim
96 words
A two-part dental cement system composed of: a. a paste comprising: 1. Alumina fluoride silica glass 2. 2-hydroxyethyl methacrylate 3. Ethoxylated bisphenol A dimethacrylate 4. Equilibrium mixture of Na NTG-GMA with NTG-GMA 5. Zinc oxide 6. Barium tungstate 7. Ethyl 4-dimethylamino benzoate; and, b. a paste comprising: 8. Alumina fluoride silica glass 9. 2-hydroxyethyl methacrylate 10. Ethoxylated bisphenol A dimethacrylate 11. 2,3-bornanediol 12. Butylated hydroxytoluene 13. Benzoyl peroxide 14. Polyacrylic acid 15. pMDM paste (a) and paste (b) being stored separately and brought into use by mixing them in an (a)/(b) weight ratio of about 1/1.
Claim 7
Dependent Claim
45 words
The system of claim 4 in which the components are present at the following concentrations: 1. 18-60% 2. 5-15% 3. 20-50% 4. 5-15% 5. 0.0-15% 6. 0-15% 7. 0.0-2% 8. 25-65% 9. 5-15% 10. 20-50% 11. 0.05-0.30% 12. 0.005-0.10% 13. 0.005-0.05% 14. 1-5% 15. 2.5-17%.
Claim 8
Dependent Claim
39 words
The system of claim 5 in which the components are present in the following concentrations: 1. 48% 2. 7% 3. 27% 4. 8% 5. 2% 6. 7% 7. 1% 8. 57% 9. 7% 10. 28% 11. 0.1% 12. 0.05%
Claim 9
Dependent Claim
5 words
0.01% 14. 3% 15. 5%.
Claim 10
Dependent Claim
5 words
0.01% 14. 3% 15. 5%.
Claim 11
Dependent Claim
22 words
A dental cement comprising the powder and liquid described in any of claims 1-3 mixed in a powder/liquid weight ratio of 2/1-1/1.
Claim 12
Dependent Claim
24 words
A dental cement comprising the pastes described in any one of claims 4-6 mixed in a paste (a)/paste (b) weight ratio of about 1/1.
Claim 13
Independent Claim
29 words
A method for treating a tooth, the method comprising applying a cement according to any one of claims 7 and 8 to the tooth and then curing the cement.
Claim 14
Dependent Claim
16 words
The method of claim 9 wherein the curing is done by exposing the cement to light.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |