# US 5,346,866 A · Dental ceramic material with a relatively low processing temperature > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,346,866 A - Document ID: US5346866A - Status: Granted - Kind: A - Application number: 08/143,367 - Filed: 1993-10-28 - Granted: 1994-09-13 - Earliest claimed: 1991-11-27 - Assignees: Degussa AG; Ducera Dental-Gesellschaft mbH - Inventors: Ottmar Komma; Juergen Steidl - Web page: https://patentgrep.com/patent/US5346866A ## CPC - C03C 8/24: Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders - A61K 6/816: comprising titanium oxide - A61K 6/822: comprising rare earth metal oxides - C03C 8/06: containing halogen - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) ## 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.degree..+-.30.degree. C., and has the following composition: 60 to 65% by weight of SiO.sub.2, 8.5 to 11% by weight of Al.sub.2 O.sub.3, 8 to 12% by weight of K.sub.2 O, 10.5 to 12% by weight of Na.sub.2 O, 0.7 to 2% by weight of CaO, 0.5 to 2.5% by weight of B.sub.2 O.sub.3, 0.1 to 0.6% by weight of Sb.sub.2 O.sub.3, 0 to 0.5% by weight of CeO.sub.2, 1.0 to 3.8% by weight of TiO.sub.2, 0.8 to 1.4% by weight of Li.sub.2 O, and 0.6 to 2.4% by weight of F.sub.2. ## Claims ### Claim 1 A dental ceramic material for the preparation and repair of metal ceramic and fully ceramic dentures, said material having a processing temperature below 700.degree. C. and a coefficient of thermal expansion .alpha. of 13-14.multidot.10.sup.-6 .multidot.K.sup.-1 between 25.degree. and 500.degree. C., said material comprising 60 to 65% by weight of SiO.sub.2, 8.5 to 11% by weight of Al.sub.2 O.sub.3, 8 to 12% by weight of K.sub.2 O, 10.5 to 12% by weight of Na.sub.2 O, 0.7 to 2% by weight of CaO, 0.5 to 2.5% by weight of B.sub.2 O.sub.3, 0.1 to 0.6% by weight of Sb.sub.2 O.sub.3, 0 to 0.5% by weight of CeO.sub.2, 1 to 3.8% by weight of TiO.sub.2, 0.8 to 1.4% by weight of Li.sub.2 O and 0.6 to 2.4% by weight of F.sub.2. ### Claim 2 (depends on 1) The dental ceramic material according to claim 1, said material comprising 60 to 63% by weight of SiO.sub.2, 8.5 to 9.7% by weight of Al.sub.2 O.sub.3, 10 to 12% by weight of K.sub.2 O, 10.5 to 11.5% by weight of Na.sub.2 O, 0.7 to 1.5% by weight of CaO, 0.7 to 1.5% by weight of B.sub.2 O.sub.3, 0.2 to 0.4% by weight of Sb.sub.2 O.sub.3, 0.1 to 0.4% by weight of CeO.sub.2, 1 to 3% by weight of TiO.sub.2, 0.8 to 1.2% by weight of Li.sub.2 O and 0.6 to 2% by weight of F.sub.2. ### Claim 3 (depends on 1) The dental ceramic material according to claim 1, wherein said material has a processing temperature of 660.degree..+-.30.degree. C. ### Claim 4 (depends on 1) The dental ceramic material according to claim 1, wherein said material has a glass point of about 450.degree. C. and a softening point of about 510.degree. C. ### Claim 5 (depends on 1) The dental ceramic material according to claim 1, said material comprising: 62.1% by weight of SiO.sub.2, 9% by weight of Al.sub.2 O.sub.3, 10.7% by weight of K.sub.2 O, 10.9% by weight of Na.sub.2 O, 1% by weight of CaO, 1% by weight of B.sub.2 O.sub.3, 0.3% by weight of Sb.sub.2 O.sub.3, 0.2% by weight of CeO.sub.2, 2% by weight of TiO.sub.2, 1% by weight of Li.sub.2 O and 1.8% by weight of F.sub.2. ### Claim 6 (depends on 1) The dental ceramic material according to claim 1, said material comprising: 63.6% by weight of SiO.sub.2, 8.6% by weight of Al.sub.2 O.sub.3, 11.2% by weight of K.sub.2 O, 10.7% by weight of Na.sub.2 O, 0.9% by weight of CaO, 1.8% by weight of B.sub.2 O.sub.3, 0.2% by weight of Sb.sub.2 O.sub.3, 0.3% by weight of CeO.sub.2, 1% by weight of TiO.sub.2, 0.8% by weight of Li.sub.2 O and 0.9% by weight of F.sub.2. ### Claim 7 (depends on 1) The dental ceramic material according to claim 1, said material comprising: 63% by weight of SiO.sub.2, 9.7% by weight of Al.sub.2 O.sub.3, 10.2% by weight of K.sub.2 O, 12% by weight of Na.sub.2 O, 0.8% by weight of CaO, 0.7% by weight of B.sub.2 O.sub.3, 0.2% by weight of Sb.sub.2 O.sub.3, 0.1% by weight of CeO.sub.2, 1.3% by weight of TiO.sub.2, 1.4% by weight of Li.sub.2 O and 0.6% by weight of F.sub.2. ### Claim 8 (depends on 1) The dental ceramic material according to claim 1, said material comprising: 62.1% by weight of SiO.sub.2, 9.7% by weight of Al.sub.2 O.sub.3, 11.9% by weight of K.sub.2 O, 10.5% by weight of Na.sub.2 O, 1.1% by weight of CaO, 1.2% by weight of B.sub.2 O.sub.3, 0.2% by weight of Sb.sub.2 O.sub.3, 0.2% by weight of CeO.sub.2, 1.2% by weight of TiO.sub.2, 1.1% by weight of Li.sub.2 O and 0.8% by weight of F.sub.2. ### Claim 9 (depends on 1) 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 10 (depends on 1) A dental prosthesis comprising a metal ceramic denture or ceramic denture and the dental ceramic material according to claim 1.