94 results about "Tooth color" patented technology

A nonaqueous gel composition for tooth whitening, comprising: (A) tooth whitening ingredient having a relative permittivity of 17.0 to 43.0 (at 25° C.) and a vapor pressure of 0 to 7000 kPa (at 25° C.), (B) substance that is soluble in the tooth whitening ingredient and is precipitated by an aqueous solution of calcium chloride, and (C) gelling agent, which nonaqueous gel composition contains substantially none of water and peroxide. This tooth whitening component can penetrate into the enamel surface layer of teeth to thereby alter the optical properties, such as refractive index and reflectance, of the enamel so that the enamel is apparently whitened. The whitened teeth can be restored to the original tooth color in a reversible manner in the presence of water. Further the persistence of reversible whitening effect can be strikingly enhanced by the nonaqueous gel composition.

An image processing system is used for dentistry. Upon creating a false tooth of a patient (59), a plurality of illuminating light of LEDs with different wavelengths emit light and a photographing apparatus (1A) photographs a tooth portion of the patient (59), thereby obtaining image data. The image data is sent to a dentistry filing system (2A) serving as a processing apparatus, and color reproducing data is obtained by calculation. The color reproducing data is sent to a dentistry factory (55) via a public line. Data is searched from a database (56) for calculating a ceramic compounding ratio, compound data of the ceramic false tooth is obtained, matching the color of the tooth portion of the patient (59), and the false tooth approximate to the tooth color of the patient (59) is created.

The invention relates to a preparation method of tooth color imitating dental tetragonal polycrystalline zirconia ceramics, which specifically comprises the following steps: taking a 3Y-TZP ceramic ingot as the raw material, taking rare earth oxide and transition element oxide as the colorant, adding the colorant and absolute ethyl alcohol into 3Y-TZP, ball milling, adding the 3Y-TZP, the absolute ethyl alcohol and agate ball milling beads into an agate ball milling pot by the mass ratio of 1:1:1, then drying, dry pressing and forming, isopressing and forming; and sintering at normal pressure, cutting and forming to obtain the tooth color imitating dental tetragonal polycrystalline zirconia ceramics. The preparation method of tooth color imitating dental tetragonal polycrystalline zirconia ceramics has the advantages that the chromatic values of 6 types of zirconia ceramics are within the range of natural tooth color, the color stability is good, the mechanical properties are excellent, and a constructed two-stage sintering process is beneficial to industrialized popularization, expands the adaptation disease scope thereof in dental clinical medicine and provides bases for the localization thereof.

In a shade guide, a plurality of shade tabs whose colors are mutually different are arranged regularly based on the colors. The arrangement of the plurality of shade tabs is an arrangement determined based on: S values and V values that are determined according to to which areas, from among areas partitioned by a plurality of straight lines in an L*-C* plane, the coordinates of the colors of the shade tabs belong, and H values that are determined according to to which areas, from among areas partitioned by a plurality of straight lines in an a*-b* plane, the coordinates belong. S groups, each of which is a shade tab group having a common S value, are arranged in the shade guide. V rows, each of which is a shade tab group having a common V value, are arranged in each S group. In each V row, the plurality of shade tabs have mutually different H values and are aligned in an order that is in accordance with the H values. Using this shade guide enables precisely and easily discriminating the color of an evaluation target tooth.

The invention provides a method for preparing dental colored nano-zirconia and the nano-zirconia prepared by the method. Prepared dental colored nano-zirconia powder can adopt a clinically common and general colored zirconia color scheme, so that tooth color matching becomes simple and practical, a clinical butment reserved space can be saved and good texture is achieved.

The invention discloses a false tooth material composition. The false tooth material composition comprises, by weight, 95-105 parts of a dentistry special-purpose tooth-making liquid, 95-105 parts of heat setting denture acrylic powder, 0.10-0.15 parts of an anticracking agent, 0.5-0.8 parts of a plasticizer and 0.1-0.3 parts of a tooth-making pigment. The dentistry special-purpose tooth-making liquid is a methyl methacrylate monomer. The heat setting denture acrylic powder is polymethyl methacrylate. The anticracking agent is polysulfone resin. The plasticizer is a mixture of benzyl salicylate and ethanol or a mixture of dibutyl phthalate and ethanol. The tooth-making pigment is zinc oxide. The polysulfone resin in the composition is used for solving the problem of easy cracking of an acrylic acid polymer material. Zinc oxide is used as the tooth-making pigment. Through control of different use amounts, false teeth has a plurality of colors, satisfy requirements on matching of dermal teeth and false teeth of a dental patent and personal tooth color appetite, and has a low price and good adaptability.

The invention provides a CBCT and laser scanning point cloud data tooth registration method based on supervoxels. The method comprises the following steps: firstly, extracting a tooth model from oralcavity CBCT scanning data according to a region growing method; secondly, processing the tooth model by using a laser scanner, and separating a dental crown in the tooth model from abutment teeth according to the characteristics of the teeth; converting the tooth models from different sources into tooth point cloud data, adding color information to the tooth point cloud data to assist initial geometric alignment of the tooth point cloud, and realizing down-sampling of the point cloud based on a super voxel method; and finally, constructing an alignment metric, and proposing a mutual corresponding matching condition based on the mixed characteristics; two pieces of tooth point cloud data with color information are registered from different angles; according to the method, tooth registrationof different resolutions can be achieved, tooth color information is manually added, the registration precision is improved, the registration time is saved, and a complete tooth model capable of being used for implantation and orthognathic surgery is constructed.

The invention discloses a method for manufacturing a personalized ceramic bracket appliance, which comprises the following steps: scanning to obtain the appearance data of the tooth surface of a patient; using a three-dimensional auxiliary design software to obtain a bracket appliance bottom plate attached to the tooth surface to be bonded and a body digital model designed according to the orthodontic treatment requirement; additionally arranging a casting channel after being integrated into a complete bracket appliance model; obtaining a bracket appliance resin wax pattern by using a 3D printing technology; using a casting ceramic material which is consistent with or close to the tooth color of the patient as a raw material; preparing a bracket appliance blank by using an embedding hot die casting technology and deembedding; obtaining the bracket appliance to be bonded after polishing and glazing. The ceramic bracket appliance has the advantages that the manufacturing period is greatly shortened, the tooth surface appearance and the tooth color of different patients can be different, the bracket appliance bottom plate which is perfectly attached to the tooth surface to be bonded and the semitransparent bracket appliance whole body which is consistent with or close to the tooth color of the tooth surface to be bonded are manufactured, the accuracy of bonding positioning is improved through indirect bonding, the personalized reticulated bottom plate also improves the bonding strength of the bracket, so that the effect of invisible orthodontic treatment is achieved, and the personalized customization requirement in clinical treatment is more met.

The invention relates to a method for preparing photo-curable dyed dental zirconia ceramic slurry for 3D printing molding, and belongs to the field of ceramic 3D printing molding. According to the method, ceramic is colored with rare earth oxides and transition metal oxides by a powder mixing (internal coloring) method to obtain a natural tooth color zirconia ceramic; and an oligomer resin and a reactive diluent are used together as a crosslinking agent, and the photo-curable dyed dental zirconia ceramic slurry for 3D printing molding is prepared by a ball milling method. The slurry has the advantages of high solid content, low viscosity, good uniformity, large curing thickness, high printing molding precision, high curing strength and the like, and the production process is simple and convenient for popularization and application. A dental ceramic preform prepared by the slurry can obtain effects of uniform natural tooth color after being subjected to degreasing and sintering, personalized customization of a shape, a size and a tooth color is realized, the denture perfectly fits with original teeth of a patient, operation time is saved, and application prospects are broad.

Metallic devices are frequently used in dental treatments, such as orthodontic archwires, rackets, or dental mini-screws. This invention provides metallic dental devices with a color of tooth or close to tooth, and their preparation methods.

The invention relates to a whitening tooth patch containing a photocatalyst and a preparation process of the whitening tooth patch, belongs to the technical field of oral care products, and aims to solve the problems that existing tooth patches use peroxide, easily cause tooth hypersensitivity and is uneven in whitening effect, poor in durability and inconvenient to use, and the packages of the tooth patches are not environmentally friendly. The whitening tooth patch comprises nano titanium dioxide, bioactive glass, acrylate/polyoxyethylene-20 octadecanol ether methyl acrylate copolymer, gel and a moisturizing agent. The whitening tooth patch has the advantages that the nano titanium dioxide is used as the photocatalyst to play a whitening role; the bioactive glass improves tooth color brightness, and the nano titanium dioxide can be attached to the surface of the teeth along with the bioactive glass to generate a continuous whitening effect; the nano titanium dioxide and the bioactiveglass are evenly dispersed in the gel substrate to achieve an even whitening effect; the whitening tooth patch is prepared into a roll shape and can be cut at will during use, the whitening tooth patch is packaged through a self-sealing zipper bag, packaging cost is lowered, and environment protection is achieved.

Generally, the present invention is incorporated in a system of interconnected software, devices (e.g., hardware, viewing screens), and databases (the “system”) that receive, log and score a series of objective data over time in order to generate an numerical score (or index). The data can be almost anything, a color, a dimension, the angle between two objects, or other objective relationships that can change over time. For health issues, the data could be a skin mole, teeth color, hair color or recession, various diseases and so forth. This invention is useful for a user who wants to track one or more health issues. In addition, this invention is useful for a seller of goods and services related to the tracked health issue.

An automatic production device for metal gold imitation zipper coloring comprises an oil removing device, a chemical polishing device and a gold imitation coloring device which are sequentially connected. The automatic production device for metal gold imitation zipper coloring is compact and reasonable in structure and convenient to operate; and the metal zipper oil removing link, the polishing link and the coloring link are conveniently completed, the oil removing effect is good, the polishing effect is good, coloring is uniform, the automation level is high, and the product quality is excellent. The automatic production device for metal gold imitation zipper coloring is mainly used for full-automatic production of H62-H68 brass chemically-colored platinum, light gold, black gold and other gold imitation zippers, and by means of a production method, the surfaces of metal zipper teeth are chemically processed, and the tooth color and the color fastness reach high-standard quality.

A support system for the manufacture of dental restorations comprises a measurement device for determining the tooth data, particularly the tooth color and color coordinates, and a data processing device including a camera for capturing a tooth image. The data processing device comprises a reception module and the measurement device comprises a transmission module, for direct transmission of measured tooth data from the measurement device to the data processing device. The support system further comprises an allocation module integrated into the data processing device for allocating the received tooth data to the tooth image, and a transmission module integrated into the data processing device for transmission of the tooth image inclusive of allocated tooth data to a data processing device of a dental laboratory.

A system having an auxiliary color selection body and a method for determining the colors of a dental object, i.e. the colors of tooth, residual limb or gingiva, is provided, wherein the auxiliary color selection body (10) has a substantially U-shaped or L-shaped or ring-shaped structure, on which at least one, preferably 4, reference features (18), for recognition of the auxiliary color selection body (10) is/are attached, and wherein, with respect to the reference features (18), a plurality of tooth, stump or gingiva color fields (30) are arranged on the color selection auxiliary body (10).

It is provided for an image of a tooth (16) to be taken with the auxiliary color selection body (10) being adjacent thereto on at least two sides and the tooth color is determined based of this image.