46 results about "Dental porcelain" patented technology

A dental prosthesis or template (10) simulates the front surfaces of a patient's teeth and is overlayed over a patient's natural teeth (40) to provide an indication of what a dental porcelain overlay may look like once applied to the patient's teeth. The dental template preferably is made from a flexible urethane or sanaprene material to allow the template to be applied against the person's natural teeth and temporarily adhere the template to his teeth provide for the visual demonstration of potential improvement to the patient's smile. The dental template (10) can be adhered to a set gel or registration paste to set the facial plane (75) at which the overlay should lie relative to the tooth plane (73) of the natural teeth (40) to establish a final restoration with an ideal and naturally appearing aesthetic result as it relates to horizontal facial planes and facial appearances.

A method of manufacturing a dental prosthesis, including: (a) a step of preparing a substrate of the dental prosthesis that is constituted by a dental molding material; (b) a step of forming a back coating layer on at least a part of a surface of the substrate, by using a first porcelain that is constituted principally by ceramic; (c) a step of forming a casting mold such that the substrate is disposed in the casting mold and such that a void is provided on a surface of the back coating layer; and (d) a step of forming a cast coating layer on at least a part of a surface of the back coating layer, by pouring a second porcelain into the void at a casting temperature. The second porcelain is constituted principally by ceramic whose composition is different from that of the ceramic of the first porcelain that viscosity of the second porcelain at the casting temperature is lower than that of the first porcelain. Also disclosed are a kit and a dental porcelain set that are used for manufacturing the dental prosthesis.

A dental alloy that comprises little or no amounts of noble metals. The alloys herein are designed to be a substitute for gold alloys in the fabrication of prosthetic dental appliances employing porcelain to metal bonds. The alloys are based on a combination of iron and chromium with a lesser inclusion of other elements to provide a high yield strength and to provide a durable impact resistant bond with dental porcelain.

The invention provides jade porcelain and a making method thereof. The blank of the jade porcelain is composed of the following raw materials in parts by weight: 10-35 parts of sodaclase, 15-30 parts of quartz, 30-60 parts of kaolin, 5-10 parts of barium carbonate, 1-3 parts of sodium tripolyphosphate and 1-5 parts of yttrium oxide; the glaze of the jade porcelain is composed of the following raw materials in parts by weight: 70-80 parts of fritted glaze, 5-10 parts of potassium feldspar and 10-20 parts of kaolin. According to the jade porcelain provided by the invention, the blank, the glaze and the firing process are improved, so that the water absorption of the jade porcelain is not greater than 0.3, the whiteness is high, the thermal shock resistance is good, the lead release is smaller than 0.1, the cadmium release is smaller than 0.1, the quality requirements of the product are satisfied, and the firing temperature and the raw material cost are reduced as well, therefore, the production cost of the product is lowered.

The present invention provides for the production of a single frit, dental porcelain, glass-ceramic containing small, uniformly dispersed, single leucite crystals of ellipsoidal habit and very uniform size.

The invention discloses a customized fixed partial denture porcelain veneer. Porcelain powder with leucite as the main ingredient is directly used for paste-on-paste decoration of tooth repair form. The porcelain veneer comprises SiO2, Al2O3, K2O, Na2O, Li2O, BaO, B2O3, CaO, Sb2O3, ZrO2, SnO2, CeO2, F and TiO2. A method for preparing the porcelain veneer comprises the steps of making a high-temperature resistant tooth die, conducting pretreatment and soaking on the die so that porcelain coating and sintering can be conducted, coating combination porcelain, dentin porcelain and cutting porcelain in sequence, conducting sintering in a sintering furnace at different temperatures every time porcelain coating is conducted, conducting form polishing and finishing after sintering, then conducting glazing, conducting sintering in the furnace again, removing the die material, and taking off the veneer with overall thickness of 0.5-0.7 mm. The veneer has high tissue compatibility, stable chemical performance and high breaking strength, the color of the veneer can be adjusted to be matched with natural teeth, and a basis is laid for clinical application of porcelain repair of oral cavity.

The present invention relates to a color adapting composition used for coloring and color adapting porcelain for ceramic crown such as dental restorations and prosthetics, and aluminosilicate glass appropriate for using in a color adapting composition. More specifically, a color adapting composition for dental porcelains are prepared by blending two or more kinds of glass frits having different sintering temperatures from each other and an inorganic pigment or a colored glass obtained by previously dispersing inorganic pigments in glass.

The invention discloses a twisted placenta porcelain prepared from pure nature raw mineral materials. The twisted placenta porcelain comprises main color mud and white mud, wherein the main color mud is prepared from the following ingredients in parts by weight: 55-65% of purple soil, 20-30% of pot clay, 6-12% of feldspar and 2-4% of silica sand; the white mud comprises 30-40% of No.1 porcelain clay, 25-30% of No.2 porcelain, 15-25% of pot clay, 10-15% of feldspar and 2-4% of silica sand. The twisted placenta porcelain has the technical scheme that the twisted placenta porcelain prepared from pure nature raw mineral materials adopts the color mud and the white mud, contraction ratios are consistent, and the color mud and the white mud are favorably blended to solve the problem that traditional twisted placenta porcelain cracks. The invention also discloses a preparation method for the twisted placenta porcelain prepared from pure nature raw mineral materials.

An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.

A dental prosthesis comprising a metal alloy pre-form and a dental porcelain veneer coating the metal alloy, wherein the metal alloy has a composition comprising, in % by weight, about 30-40% Co, 25-40% Ru, 20-40% Cr, and 0-0.1% Ni and wherein a coefficient of thermal expansion of the metal alloy is compatible with that of the dental porcelain to prevent cracking of the porcelain

The invention discloses a conical head suspension type insulator cementing device. Two ends of a steel leg porcelain part production line are provided with first conveyers respectively. The first conveyers are in rolling connection with a porcelain part conveying belt. The lower part of a porcelain spraying machine is connected with a No.1 cylinder guide post and a No.1 motor reducing gear is arranged on the right side of the middle part of the No.1 cylinder guide post. The lower part of the No.1 cylinder guide post is hinged with a spraying machine gripper. Two ends of a steel cap conveying vibration line are provided with second conveyors respectively. The upper part of a steel cap spraying machine is connected with a No.2 cylinder guide post and a No.2 motor reducing gear is arranged onthe right side of the middle part of the No.2 cylinder guide post. A second spray head is arranged above the No.2 cylinder guide post. According to the invention, automatic conveying, pitch spraying,drying, cement pouring and porcelain part steel leg fixing work of the porcelain part conveying belt are implemented by utilizing the steel leg porcelain part production line. At the same time, automatic cavity pitch spraying, drying, cement pouring, installation of the steel legs in steel caps, vibration cementing and cementing porcelain part flushing of steel caps are implemented by utilizing the steel cap conveying vibration line.

The invention provides a ceramic product provided with a china decorative accessory on the strengthened dental porcelain and a manufacturing method of the ceramic product. The ceramic product comprises a strengthened dental porcelain basal body, wherein a china decorative accessory is bonded on the basal body; and the manufacturing method of the ceramic product comprises the steps of: (1) manufacturing the strengthened dental porcelain basal body; (2) manufacturing the china decorative accessory; (3) bonding the china decorative accessory on the dental porcelain basal body, and drying naturally; (4) bisque-firing a green body at a low temperature, and cooling naturally; and (5) detecting, finishing, polishing, and glazing and glaze-firing after watering. By applying the manufacturing method disclosed by the invention, the china decorative accessory is bonded on the strengthened dental porcelain, thus the strength of the main body, the light-transmitting property and crystal-clear property of the decorative accessory, and the three-dimensional relief decoration effect are reflected; a special bonding material is adopted for bonding, thus the problem of crack easily caused by non-uniform coefficients of thermal expansion of two kinds of perform bodies are solved, and the yield of the product is improved; and the daily-use property and the artistic quality are organically combined, and the grade and the additional value of the product are improved.

The invention relates to an oral dental material structure with high chaining force. The oral dental material structure is used for being combined on a gum and comprises a metal base, a ceramic membrane layer and a dental porcelain layer, the ceramic membrane layer is melted by atmospheric plasma, the metal base is sleeved on the gum, the ceramic membrane layer is plated on the surface of the metal base in a spraying manner, the dental porcelain layer is sintered on the ceramic membrane layer, so that the chaining force between the metal base and the dental porcelain layer is increased, and problems that the metal base is exposed and metal ions release are avoided.

To provide a 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 of the present disclosure. To provide a low melting glass composition with softening point (Ts) less than 600° C. 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 8.5 wt. % and two or more kinds of alkali metal oxide: 10.5 to 20.0 wt. %.

A dental mixing palette for ceramic materials such as dental porcelain. The dental mixing palette has a base body, a bearing member mounted on the base body, a rotary platter mounted on the bearing member for undergoing rotational movement relative to the base body, a mixing part disposed on the rotary platter, and a cover configured to selectively, removably covering the mixing part.

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 provides a 3D printed cobalt-chromium alloy for dental porcelain repair and a preparation method thereof, and belongs to the field of dental porcelain repair. A Ta element is added, so that the thermal expansion coefficient is reduced, the metal ceramic bonding strength is improved, the surface active energy is reduced, solid solution strengthening is caused, and the strength is improved; the content of a Cr element is increased, the content of a Co element is reduced, the content of a hcp phase is increased, metal and ceramic bonding is facilitated, after the content of the Co element is reduced, combination of Cr-W, Cr-Mo, Cr-Si and W-Mo is improved, and the strength of the alloy is improved; vacuum stress relief annealing is adopted, and residual stress is completely eliminated, so that microstructure phase change caused by the residual stress in the service process of a cobalt-chromium restoration is avoided, and micro-cracks are prevented from being formed on a metal-ceramic bonding interface; and solid solution and aging are adopted, the composition of a cobalt-chromium alloy phase and precipitation of a second phase are adjusted, so that the alloy has good mechanical properties, meanwhile, the hcp phase is further improved, and the metal-ceramic bonding strength is improved.

An alloy is provided for dental porcelain fused to metal restorations, having a rich gold color and light oxide coating for bonding the porcelain to the cast alloy substrate. The alloy has suitable mechanical properties for the support of the porcelain and is readily polished to a bright sheen. The alloy includes from 96 to 98 weight % Au with up to 3 weight % Pt, Pd, Ru, Ir, or combinations thereof and 0 to 1.5 wt % In, Sn, Fe, Mn, Cu, B, or combinations thereof.

The invention relates to a nickel base alloy used for dental porcelain, which is characterized by comprising rare earth elements; the chemical compositions (weight percentage) are as follows: 20 to 25 percent of chromium, 5 to 8 percent of molybdenum, 1 to 5 percent of cerium, 0.5 to 1 percent of manganese, 0.3 to 0.5 percent of rhodium, 1 to 5 percent of tungsten, 1 to 2 percent of silicon, 0.01 to 0.20 percent of cerium and the balance of nickel. The invention not only has good oxidation resistance and corrosion resistance but also has good casting and cutting performances and can be well matched with the existing porcelain powder for use.