Patent EP0328772A2 successfully refreshed from Google Patents.
EP0328772A2
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EP
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Dental ceramic material and methods
Assignee: Dentsply Sirona Inc
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Filing: 1988-12-16
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Granted: —
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Expires: 2008-12-16
Abstract
Abstract A porcelain paste composition and a method of building a dental appliance are provided. The paste of the invention comprises a mixture of ceramic powders and a curable adhesive resin. In the method, opaqued metal copings are coated with the paste of the invention to provide a coating thereon, and the coating is then cured. The cured coating is prepared by machining or other methods known in the art to obtain the desired shape of the coating and the coping, and the coating is then fired to fuse the ceramic powders in the coating to produce a porcelain finish on the dental appliance.
Inventors
- 👤 Fred B. Pursell, Sr.
- 👤 Joseph M. Kacicz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/19; A; A61; A61K; A61K6/00; A61K6/80; A61K6/802; A61K6/807; A61K6/816; A61K6/818; A61K6/822
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
90 words
A porcelain paste composition comprising ceramic powder and polymerizable resin modeling liquid in which said resin is selected from the group comprising a single component light polymerizable resin, multi-component light polymerizable resin, and multi-component chemically cured resin and said ceramic powder comprises about 60-69% SiO₂, about 12-20% Al₂O₃, about 8-14% K₂O, about 4.5-7.1% Na₂O, about 0-2% CaO, about 0-1.5% Li₂O, about 0-1% MgO, about 0-2% 5% BaO, about 0-1.8% Sb₂O₃, about 0-1 % P₂O₅, about 0-1.5% CeO₂, about 0-0.5% ZrO₂, about 0-1% TiO₂, about 0-1.5% F, and about 0-1.5% B₂O₃.
Claim 2
Dependent Claim
90 words
A porcelain paste composition comprising ceramic powder and polymerizable resin modeling liquid in which said resin is selected from the group comprising a single component light polymerizable resin, multi-component light polymerizable resin, and multi-component chemically cured resin and said ceramic powder comprises about 60-69% SiO₂, about 12-20% Al₂O₃, about 8-14% K₂O, about 4.5-7.1% Na₂O, about 0-2% CaO, about 0-1.5% Li₂O, about 0-1% MgO, about 0-2% 5% BaO, about 0-1.8% Sb₂O₃, about 0-1 % P₂O₅, about 0-1.5% CeO₂, about 0-0.5% ZrO₂, about 0-1% TiO₂, about 0-1.5% F, and about 0-1.5% B₂O₃.
Claim 3
Dependent Claim
20 words
The composition of claim 1 in which said resin is a dental adhesive adapted to bond filling material to teeth.
Claim 4
Dependent Claim
16 words
The composition of claim 1 in which said resin comprises a phosphorus containing polymerizable methacrylate resin.
Claim 5
Dependent Claim
17 words
The composition of claim 1 in which said ceramic powders comprise 5-40% by weight ground feldspar frit.
Claim 6
Dependent Claim
43 words
The composition of claim 2 in which the adhesive composition comprises an elastomeric resin, hydroxyalkyl substituted dimethacrylate, hydroxyaryl substituted dimethacrylate, ethylenically unsaturated polymeric phosphoric acid ester, N-alkyl substituted methacrylate, hydroxy alkyl substituted methacrylate and at least one catalyst and at least one accelerator.
Claim 7
Dependent Claim
61 words
The composition of claim 2 in which said curable resin adhesive comprises an ethylenically unsaturated polymeric monophosphate of the formula and salts thereof in which: R is a pentaerythritol radical containing from 4 to 16 carbon atoms; R₁ is a hydrogen atom, alkyl of 1 to 3 carbon atoms, halogen or -CN, and n is an integer of at least 3.
Claim 8
Dependent Claim
38 words
The composition of claim 1 in which said ceramic powder comprises WT % SiO₂ 63.8 Al₂O₃ 16.3 K₂O 11.2 Na₂O 5.2 CaO 0.6 Li₂O 0.2 BaO 1.2 Sb₂O₃ 0.1 B₂O₃ 0.4 TiO₂ 0.2 ZrO₂ 0.2 CeO₂ 0.6 100.0
Claim 9
Dependent Claim
38 words
The composition of claim 2 in which said curable resin adhesive comprises urethane elastomeric resin, triethylene glycol dimethacrylate (TEGDMA), bisphenol-A-dimethacrylate, dipentaerythritol penta acrylate phosphoric acid ester (PENTA), 2-N-morpholinoethyl methacrylate, camphorquinone, lithium toluene sulfinate, and butylated hydroxy toluene (BHT).
Claim 10
Independent Claim
71 words
A method for making a dental restorative comprising the steps of: (a) Mixing ceramic powder with a polymerizable resin modeling liquid to prepare spreadable paste; (b) Applying said paste to dental restorative substructure to provide a coating of ceramic paste thereon; (c) Curing said resin to effectively fix said coating in its desired shape and thickness; and (d) Firing said dental restorative substructure and said coating to fuse said ceramic powder.
Claim 11
Independent Claim
71 words
A method for making a dental restorative comprising the steps of: (a) Mixing ceramic powder with a polymerizable resin modeling liquid to prepare spreadable paste; (b) Applying said paste to dental restorative substructure to provide a coating of ceramic paste thereon; (c) Curing said resin to effectively fix said coating in its desired shape and thickness; and (d) Firing said dental restorative substructure and said coating to fuse said ceramic powder.
Claim 12
Dependent Claim
20 words
The method of claim 9 in which said resin is a dental adhesive adapted to bond filling material to teeth.
Claim 13
Dependent Claim
12 words
The method of claim 9 wherein said resin is phosphorus containing methlymethacrylate.
Claim 14
Dependent Claim
36 words
The method of claim 9 comprising firing said dental restorative in a manner and at a temperature in which said resin is first vaporized without burning, charring or boiling and then said ceramic powder is fused.
Claim 15
Dependent Claim
61 words
The method of claim 9 in which said ceramic powder comprises about 60-69 % SiO₂, about 12-20 % Al₂O₃, about 8-14 % K₂O, about 4.5-7.1% Na₂O, about 0-2% CaO, about 0-1.5% Li₂O, about 0-1% MgO, about 0-2. 5% BaO, about 0-1.8% Sb₂O₃, about 0-1% P₂O₅, about 0-1.5% CeO₂, about 0-0.5% ZrO₂, about 0-1% TiO₂, about 0-1.5% F, and about 0-1.5% B₂O₃.
Claim 16
Dependent Claim
18 words
The method of claim 9 in which said ceramic powder comprises about 5-40% by weight ground feldspar frit.
Claim 17
Dependent Claim
57 words
The method of claim 9 in which said polymerizable resin comprises a compound of the formula and salts thereof in which: R is a pentaerythritol radical containing from 4 to 16 carbon atoms; R₁ is a hydrogen atom, alkyl of 1 to 3 carbon atoms, halogen or -CN, and n is an integer of at least 3.
Claim 18
Dependent Claim
39 words
The method of claim 9 in which said adhesive composition comprises an elastomeric resin, hydroxyalkyl substituted dimethacrylate, hydroxyaryl substituted dimethacrylate, ethylenically unsaturated polymeric phosphoric acid ester, N-alkyl substituted methacrylate, and at least one catalyst and at least one accelerator.
Claim 19
Dependent Claim
38 words
The method of claim 9 in which said ceramic powder comprises WT % SiO₂ 63.8 Al₂O₃ 16.3 K₂O 11.2 Na₂O 5.2 CaO 0.6 Li₂O 0.2 BaO 1.2 Sb₂O₃ 0.1 B₂O₃ 0.4 TiO₂ 0.2 ZrO₂ 0.2 CeO₂ 0.6 100.0
Claim 20
Dependent Claim
39 words
The method of claim 10 in which said curable resin adhesive comprises a urethane elastomeric resin, triethylene glycol dimethacrylate (TEGDMA), bisphenol-A-dimethacrylate, dipentaerythritol penta acrylate phosphoric acid ester (PENTA), 2-N-morpholinoethyl methacrylate, camphorquinone, lithium toluene sulfinate, and butylated hydroxy toluene (BHT).
Claim 21
Dependent Claim
11 words
A dental restorative made according to the method of claim 9.
Claim 22
Dependent Claim
14 words
The use of the ceramic paste of claim 1 for preparing a dental restorative.
Claim 23
Dependent Claim
13 words
The use of the ceramic paste of claim 1 for building up crowns.
Claim 24
Dependent Claim
12 words
The use of the ceramic paste of claim 1 for patching enamel.
Claim 25
Dependent Claim
14 words
The use of the ceramic paste of claim 1 for building veneers and laminates.
Claim 26
Dependent Claim
14 words
The use of the ceramic paste of claim 1 for connecting porcelain bridgework units.
Claim 27
Dependent Claim
17 words
The use of the ceramic paste of claim 1 for preparing direct and indirect inlays and onlays.
References Cited (Backward Citations)
No citation records indexed.
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