US5346866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental ceramic material with a relatively low processing temperature
Assignee: DUCERA DENTAL-GESELLSCHAFT GmbH
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Filing: 1993-10-28
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Granted: 1994-09-13
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Expires: 2013-10-28
Abstract
Abstract A dental ceramic material is disclosed for the preparation and repair of metal ceramic and fully ceramic dentures, which has a processing temperature of 660°±30° C., and has the following composition: 60 to 65% by weight of SiO 2 , 8.5 to 11% by weight of Al 2 O 3 , 8 to 12% by weight of K 2 O, 10.5 to 12% by weight of Na 2 O, 0.7 to 2% by weight of CaO, 0.5 to 2.5% by weight of B 2 O 3 , 0.1 to 0.6% by weight of Sb 2 O 3 , 0 to 0.5% by weight of CeO 2 , 1.0 to 3.8% by weight of TiO 2 , 0.8 to 1.4% by weight of Li 2 O, and 0.6 to 2.4% by weight of F 2 .
Inventors
- 👤 Ottmar Komma
- 👤 Juergen Steidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:27
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; A; A61; A61K; A61K6/00; A61K6/80; A61K6/802; A61K6/816; A61K6/822; C03C8/02; C03C8/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A dental ceramic material for the preparation and repair of metal ceramic and fully ceramic dentures, said material having a processing temperature below 700° C. and a coefficient of thermal expansion α of 13-14·10 -6 ·K -1 between 25° and 500° C., said material comprising 60 to 65% by weight of SiO 2 , 8.5 to 11% by weight of Al 2 O 3 , 8 to 12% by weight of K 2 O, 10.5 to 12% by weight of Na 2 O, 0.7 to 2% by weight of CaO, 0.5 to 2.5% by weight of B 2 O 3 , 0.1 to 0.6% by weight of Sb 2 O 3 , 0 to 0.5% by weight of CeO 2 , 1 to 3.8% by weight of TiO 2 , 0.8 to 1.4% by weight of Li 2 O and 0.6 to 2.4% by weight of F 2 .
Claim 2
Dependent Claim
149 words
A dental ceramic material for the preparation and repair of metal ceramic and fully ceramic dentures, said material having a processing temperature below 700° C. and a coefficient of thermal expansion α of 13-14·10 -6 ·K -1 between 25° and 500° C., said material comprising 60 to 65% by weight of SiO 2 , 8.5 to 11% by weight of Al 2 O 3 , 8 to 12% by weight of K 2 O, 10.5 to 12% by weight of Na 2 O, 0.7 to 2% by weight of CaO, 0.5 to 2.5% by weight of B 2 O 3 , 0.1 to 0.6% by weight of Sb 2 O 3 , 0 to 0.5% by weight of CeO 2 , 1 to 3.8% by weight of TiO 2 , 0.8 to 1.4% by weight of Li 2 O and 0.6 to 2.4% by weight of F 2 .
Claim 3
Dependent Claim
115 words
The dental ceramic material according to claim 1, said material comprising 60 to 63% by weight of SiO 2 , 8.5 to 9.7% by weight of Al 2 O 3 , 10 to 12% by weight of K 2 O, 10.5 to 11.5% by weight of Na 2 O, 0.7 to 1.5% by weight of CaO, 0.7 to 1.5% by weight of B 2 O 3 , 0.2 to 0.4% by weight of Sb 2 O 3 , 0.1 to 0.4% by weight of CeO 2 , 1 to 3% by weight of TiO 2 , 0.8 to 1.2% by weight of Li 2 O and 0.6 to 2% by weight of F 2 .
Claim 4
Dependent Claim
18 words
The dental ceramic material according to claim 1, wherein said material has a processing temperature of 660°±30° C.
Claim 5
Dependent Claim
27 words
The dental ceramic material according to claim 1, wherein said material has a glass point of about 450° C. and a softening point of about 510° C.
Claim 6
Dependent Claim
93 words
The dental ceramic material according to claim 1, said material comprising: 62.1% by weight of SiO 2 , 9% by weight of Al 2 O 3 , 10.7% by weight of K 2 O, 10.9% by weight of Na 2 O, 1% by weight of CaO, 1% by weight of B 2 O 3 , 0.3% by weight of Sb 2 O 3 , 0.2% by weight of CeO 2 , 2% by weight of TiO 2 , 1% by weight of Li 2 O and 1.8% by weight of F 2 .
Claim 7
Dependent Claim
93 words
The dental ceramic material according to claim 1, said material comprising: 63.6% by weight of SiO 2 , 8.6% by weight of Al 2 O 3 , 11.2% by weight of K 2 O, 10.7% by weight of Na 2 O, 0.9% by weight of CaO, 1.8% by weight of B 2 O 3 , 0.2% by weight of Sb 2 O 3 , 0.3% by weight of CeO 2 , 1% by weight of TiO 2 , 0.8% by weight of Li 2 O and 0.9% by weight of F 2 .
Claim 8
Dependent Claim
93 words
The dental ceramic material according to claim 1, said material comprising: 63% by weight of SiO 2 , 9.7% by weight of Al 2 O 3 , 10.2% by weight of K 2 O, 12% by weight of Na 2 O, 0.8% by weight of CaO, 0.7% by weight of B 2 O 3 , 0.2% by weight of Sb 2 O 3 , 0.1% by weight of CeO 2 , 1.3% by weight of TiO 2 , 1.4% by weight of Li 2 O and 0.6% by weight of F 2 .
Claim 9
Dependent Claim
93 words
The dental ceramic material according to claim 1, said material comprising: 62.1% by weight of SiO 2 , 9.7% by weight of Al 2 O 3 , 11.9% by weight of K 2 O, 10.5% by weight of Na 2 O, 1.1% by weight of CaO, 1.2% by weight of B 2 O 3 , 0.2% by weight of Sb 2 O 3 , 0.2% by weight of CeO 2 , 1.2% by weight of TiO 2 , 1.1% by weight of Li 2 O and 0.8% by weight of F 2 .
Claim 10
Dependent Claim
26 words
A method of using the dental ceramic material according to claim 1, said method comprising enamelling dentures with the dental ceramic material according to claim 1.
Claim 11
Dependent Claim
20 words
A dental prosthesis comprising a metal ceramic denture or ceramic denture and the dental ceramic material according to claim 1.
References Cited (Backward Citations)
US5009709A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |