46 results about "Dental ceramics" patented technology

The invention relates to an opaque dental ceramic for burning on a rack or implant of dental restoration at least comprising SiO2, Al2O3, B2O3, Na2O, K2O as well as TiO2. To cover the non-dental-coloured implant material sufficiently the invention provides that the opaque dental ceramic is clouded by precipitation of one or more crystalline TiO2 phases.

An object of the present invention is to provide a one-pack type dental adhesive composition which can exhibit excellent adhesion to any material, for example, dental ceramics, organic composites containing inorganic compounds, dental noble metals and dental non-noble metals, and also has excellent storage stability.Disclosed is a one-pack type dental adhesive composition comprising a silane coupling agent as a component (a), an acidic group-containing polymerizable monomer as a component (b), a sulfur atom-containing polymerizable monomer as a component (d), and other components.

A system, method and composition for coloring dental ceramics. The system, method, and composition resulting in natural color matching without drying time between color layers. The system, method and composition also resulting in good color preparation on restorations of about 0.001 mm-1.000 mm thickness.

Metal alloys for dental porcelain fusing and dental prosthetic appliances are provided. The metal alloy includes: gold (Au) in an amount that is greater than 0 and equal to or smaller than 35 weight %; silver (Ag) in an amount of 5 to 35 weight %; indium (In) in an amount of 6 to 40 weight %; palladium (Pd) in an amount of 30 to 70 weight %; and at least one element selected from the group consisting of boron (B), germanium (Ge), zirconium (Zr), silicon (Si) and iron (Fe) in a total amount that is greater than 0 and equal to or smaller than 5.0 weight %.

The invention discloses a gradient transparency zirconia dental ceramic and a preparation method thereof, which belong to the technical field of dental ceramic preparation. The raw material is mixed from 2-5 kinds of zirconia ceramic powders with different sintered transparency. The sintered zirconia ceramics gradually increase in transparency from the bottom to the top, and contain 5-11 porcelain layers with different transparency. The preparation method includes five steps of preparing mixed powder, dry pressing, cold isostatic pressing, pre-sintering and green body repairing. The preparation method of the invention is simple and easy, and the transparency distribution characteristics of the prepared dental zirconia all-ceramic material are similar to those of natural teeth, thereby improving the aesthetics of the zirconia all-ceramic restoration.

The present invention is directed to a dental mount for receiving and retaining a plurality of different dental ceramic blocks used in dental restoration treatments, wherein the dental mount comprises a substantially flat front face having a plurality of dental ceramic block receiving holes located thereon; each of the dental ceramic block receiving holes being dimensioned to form a retaining fit with any one of the different dental ceramic blocks. The advantage of providing a dental mount with dedicated holes for retaining any one of the dental ceramic blocks is that the dental mount can be used to comparatively present all the different types of dental ceramic blocks next to one another in an organized and graded manner so that a dentist may make quick and accurate comparisons between the different types of dental ceramic blocks. Furthermore, the dentist can quickly assess their stock levels by glancing at the dental mount. A further advantage is that the dental ceramic blocks are securely held apart from one another on the dental mount and therefore cannot damage one another when they are moved or transported.

The invention provides a glass composition which can be used for a dental porcelain or a dental ceramics coloring material, and has low temperature meltability, acid resistance and preservation stability under the humid environment which are required for a dental porcelain or a dental ceramics coloring material, and a dental porcelain and dental ceramics coloring material which contain the glass composition powder. The invention provides a low melting glass composition with softening point (Ts) less than 600 degrees centigrade comprising, as a component; SiO2: 55.0 to 75.0 wt.%, B2O3: 6.1 to 12.0 wt.%, Al2O3: 2.0 to 8.0 wt.%, ZnO: 2.0 to 85 wt.% and two or more kinds of alkali metal oxide: 10.5 to 20.0 wt.%.

Improved systems and methods for producing dental restorations and ceramic materials for such restorations are disclosed. Optical properties, preferably including color and translucence characteristics, of a tooth or teeth of a patient are measured with a shade measuring instrument. The tooth to be restored is prepared, and a physical or virtual dental impression is created. A prescription for the restoration, which typically includes color, translucence and thickness information, is sent to the restoration fabrication facility either electronically or physically. A recipe and / or a mixture of ceramics are generated for the restoration, with multiple layers being specified, based on the measured optical properties. The recipe algorithm may adapt, or process checks may be performed, based on measurements of fabricated layers. Preferably, dental ceramics are specified to bracket the region of color space relevant to human teeth, and a reduced set of ceramic materials are manufactured and distributed. Based on measured optical characteristics of the ceramic materials, recipes and / or material mixtures are specified or prepared for the restoration. A virtual impression data file may be transmitted to the laboratory instead of a physical impression.

The present invention provides a one-component dental adhesive composition which can exhibit excellent adhesion to both materials of a dental ceramics and an organic composite containing an inorganic compound, and is excellent in can-stability. More particularly, the present invention provides a one-component dental adhesive composition comprising 1 to 60 parts by weight of (a) a silane coupling agent, 1.0 to 20.0 parts by weight based on 100 parts by weight of the (a) component of (b) an acidic group-containing polymerizable monomer, and 28 to 99 parts by weight of (c) a volatile organic solvent.

A system, method and kit for coloring dental ceramics. The system, method, and kit resulting capable of adjusting the shade of a dental restoration milled from a colored zirconia porcelain block from one color value of the VITA shade guide to a different color value of the VITA shade guide.

The invention discloses a method for modifying the bonding surface of dental non-silicate-based ceramics, which belongs to the tooth restoration technology. Including the film forming process and the heat treatment step of the restoration after film formation; the dental ceramic restoration is sandblasted with 110 μm alumina for 20 seconds under a pressure of 0.2 MPa, ultrasonically cleaned in absolute ethanol for 10 minutes, and dried. Brush the sandblasted surface evenly with 40% nano-silica sol, and then place it in a closed environment with a relative humidity of 60-70% to dry for 24 hours. Then heat treat. The beneficial effect of the invention is that it can prepare high-quality coatings on the bonding surface of complex dental non-silicate-based ceramic restorations, simplifies the operation steps, reduces the cost, and achieves the principle of not affecting the aesthetic effect. For the purpose of improving the ceramic / resin bonding strength, the relevant materials and equipment do not need to be imported, which is in line with the national conditions, has good clinical application prospects and high practical value.