US5183834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pasty dental veneer making composition
Assignee: Dentsply GmbH
•
Filing: 1989-04-05
•
Granted: 1993-02-02
•
Expires: 2009-04-05
Abstract
Abstract A heat cured pasty composition adapted to form a dental veneer which is resistant or immune to interdental cracks while in use on crowns and bridges. The composition includes polymerizable urethane-acrylic monomer, inorganic fillers, pyrogenic silica, heat activated polymerization initiators, and fractured organic filler particles. Heat polymerization of the composition above about 100° C. forms a polymer which has a microhardness of at least HV 0.1/10 18.0 Kp/mm 2 , and an impact strength of at least 2.0 KJ/m 2 .
Inventors
- 👤 Karl J. Gorlich
- 👤 Fritz U. Bauer
- 👤 Joerg Konetzka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:37
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
59 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a polymer useful as a dental veneer comprising by weight about (a) 20-60% polymerizable urethane-acrylic binders, (b) 4.0-50% crushed silanized glass fillers, (c) 10-55% pyrogenic silica, (d) 0.05-3% alkylacylperoxide, (e) 0.05-3% heat activated nonperoxide initators, (f) 0.05-2% U.V. stabilizers, and (g) 10-60% fractured acrylic polymers.
Claim 2
Dependent Claim
59 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a polymer useful as a dental veneer comprising by weight about (a) 20-60% polymerizable urethane-acrylic binders, (b) 4.0-50% crushed silanized glass fillers, (c) 10-55% pyrogenic silica, (d) 0.05-3% alkylacylperoxide, (e) 0.05-3% heat activated nonperoxide initators, (f) 0.05-2% U.V. stabilizers, and (g) 10-60% fractured acrylic polymers.
Claim 3
Dependent Claim
55 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a polymer useful as a dental veneer comprising by weight about (a) 31-34% polymerizable uretane-acrylic binders, (b) 7-11% crushed silanized glass fillers, (c) 17-21% pyrogenic silica, (d) 0.3-0.6% tert-butyl-perisononanoate, (e) 0.3-0.6% benzopinacol, (f) 0.05-0.5% 2,4-dihydroxybenzophenone, and (g) 35-38% fractured acrylic polymers.
Claim 4
Dependent Claim
55 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a polymer useful as a dental veneer comprising by weight about (a) 31-34% polymerizable uretane-acrylic binders, (b) 7-11% crushed silanized glass fillers, (c) 17-21% pyrogenic silica, (d) 0.3-0.6% tert-butyl-perisononanoate, (e) 0.3-0.6% benzopinacol, (f) 0.05-0.5% 2,4-dihydroxybenzophenone, and (g) 35-38% fractured acrylic polymers.
Claim 5
Dependent Claim
24 words
The pasty dental composition adapted for heat polymerization above about 100° C. of claim 1 wherein said composition is polymerized to form a veneer.
Claim 6
Dependent Claim
24 words
The pasty dental composition adapted for heat polymerization above about 100° C. of claim 2 wherein said composition is polymerized to form a veneer.
Claim 7
Dependent Claim
66 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a veneer polymer having an impact strength of at least 2.0 KJ/M 2 , comprising by weight about (a) 20-60% polymerizable urethane-acrylic binders, (b) 4.0-50% crushed silanized glass fillers, (c) 10-55% pyrogenic silica, (d) 0.05-3% alkylacylperoxide, (e) 0.05-3% heat activated nonperoxide initators, (f) 0.05-2% U.V. stabilizers, and (g) 10-60% fractured acrylic polymers.
Claim 8
Dependent Claim
66 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a veneer polymer having an impact strength of at least 2.0 KJ/M 2 , comprising by weight about (a) 20-60% polymerizable urethane-acrylic binders, (b) 4.0-50% crushed silanized glass fillers, (c) 10-55% pyrogenic silica, (d) 0.05-3% alkylacylperoxide, (e) 0.05-3% heat activated nonperoxide initators, (f) 0.05-2% U.V. stabilizers, and (g) 10-60% fractured acrylic polymers.
Claim 9
Dependent Claim
62 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a veneer polymer having an impact strength of at least 2.0 KJ/M 2 , comprising by weight about (a) 31-34% polymerizable urethane-acrylic binders, (b) 7-11% crushed silanized glass fillers, (c) 17-21% pyrogenic silica, (d) 0.3-0.6% tert-butyl-perisononanoate, (e) 0.3-0.6% benzopinacol, (f) 0.05-0.5% 2,4-dihydroxybenzophenone, and (g) 35-38% fractured acrylic polymers.
Claim 10
Dependent Claim
62 words
A pasty dental composition adapted for heat polymerization above about 100° C. to form a veneer polymer having an impact strength of at least 2.0 KJ/M 2 , comprising by weight about (a) 31-34% polymerizable urethane-acrylic binders, (b) 7-11% crushed silanized glass fillers, (c) 17-21% pyrogenic silica, (d) 0.3-0.6% tert-butyl-perisononanoate, (e) 0.3-0.6% benzopinacol, (f) 0.05-0.5% 2,4-dihydroxybenzophenone, and (g) 35-38% fractured acrylic polymers.
References Cited (Backward Citations)
US3825518A
Cited
US4038257A
Cited
EP0011734A2
Cited
EP0011735A2
Cited
US4328325A
Cited
EP0026398A2
Cited
US4330283A
Cited
EP0033750A1
Cited
GB2069517A
Cited
US4424333A
Cited
US4650550A
Cited
US4483759A
Cited
US4873269A
Cited
US5009597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-02 | 1996-08-03 | 1997-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-02 | 2000-08-03 | 2001-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-02 | 2004-08-03 | 2005-02-02 | $7700.00 | Window Closed / Lapsed |