A method for directly printing orthodontic and dental appliances on the teeth of a patient. The tooth is scanned with a scanner which is communicated with a computer controller configured to recognize the anatomy of the tooth. The surface of a tooth of the patient is then prepared in order to receive the type of appliance designated for the patient. Using image data from the print head, the computer controller prepares a three-dimensional blueprint or design of an appropriate orthodontic or dental appliance. The computer controller controls the type and amount of material that is distributed through the print head only when the print head passes over the recognized anatomy so as to directly print the corresponding appliance onto the tooth layer by layer as the print head makes successive passes over the surface of the tooth.

A zirconia sintered body comprises zirconia and multiple different areas, including at least one upper area and at least one lower area having a different chemical composition and a different strength. The sintered body has a translucency and a strength with an inverse relationship. The translucency increases in one direction across the multiple different areas and the strength decreasing in the same direction across the multiple different areas. At least part of the sintered body has a total light transmittance of at least 35% and less than 53% to light with a wavelength at least at a point between 400 nm and 600 nm, and at least 51% and less than 57% to light with a wavelength at least at a point between 600 nm and 800 nm, at a thickness of 0.6 mm. At least a part of the sintered body has a strength of at least 925 Mpa.

The invention relates to a blank of a ceramic material, wherein a first ceramic material and then a second ceramic material of different compositions are filled into a die and wherein the materials are pressed and after pressing are sintered. A layer of the first ceramic material is thereby filled into the die and a first cavity formed in the layer, the second ceramic material is then filled into the first open cavity and the materials pressed together and then heat-treated.

To provide a liquid material which can only adjust transparency by applying on a part of a zirconia crown having high transparency, without coloring. The present disclosure provides an opaque imparting liquid used for a prosthesis device cut and machined from a dental zirconia for cutting and machining, comprising; (a) 10 to 39 wt. % of a water-soluble aluminum compound and/or a water-soluble lanthanum compound, (b) 60 to 89 wt. % of water, and (c) 1 to 20 wt. % of an organic solvent.

Disclosed are an apparatus and method for setting a margin line and a recording medium, wherein the apparatus and method set a margin line corresponding to the outline of the boundary between a tooth and a prosthesis on the basis of three-dimensional virtual model data of the tooth obtained by using a three-dimensional scanner such as an oral scanner or the like. The method for setting a margin line according to an embodiment of the present disclosure, comprises the steps of: generating curve information about the peripheral area of the margin line candidate points selected in a three-dimensional virtual model obtained for a tooth; and setting a margin line indicating the outline of the boundary between the tooth and a prosthesis on the basis of the curve information.

A partial dental arch is provided with dentin material and with cutting material and a boundary area therebetween. It includes a primary-position tooth region and additional tooth regions which are arranged more distally. A wavy structure of the boundary area is provided whose amplitude—when viewed in the distal direction—decreases in at least one section of the mesial-distal and/or occlusal-gingival extension, in particular with regard to the occlusal-gingival direction.

A method of forming a prosthetic tooth element (104) is disclosed, the method comprising depositing a first hardenable fluid material (101) at a bottom of a cavity (111) of a female mould (110) to a first level (113), the first material having a first translucency when hardened; depositing in the cavity (111), over the first material (101), a second hardenable fluid material (102) to a second level (114), the second material having a second translucency when hardened, the second translucency being less translucent than the first translucency; and inserting a male mould (120) into the cavity (111), the insertion of the male mould displacing at least a portion of the second material (102) within the cavity (111).

The present invention relates to an apparatus and method for three-dimensionally laminating a ceramic denture in a color-and-transmittance variable manner. A base slurry and a light transmissive slurry are mixed at a ratio regulated by a main controller according to a slurry ratio parameter datum, and then a slurry mixture is laid on a substrate by a laying module to form a slurry layer; next, the slurry layer is photocured by a photocuring module according to a laminated graphic under control of the main controller; in such a manner, the slurry layers are laminated and cured one by one so that a denture green body is formed; finally, the denture green body is sintered at a high temperature to form a ceramic denture. The present invention allows each slurry layer to exhibit different color and transmittance, resulting in quite natural gradation of color and gradation of transmittance.

Apparatus for detecting a 3D structure of an object, comprising at least three laser emitters and a beam splitter that splits the laser radiation of the laser emitters into a reference radiation and an illumination radiation. The illumination radiation strikes the object to be measured, is reflected by the object as object radiation and interferes with the reference radiation. A detector receives the interference patterns formed from the interference of the reference and object radiation and an analysis unit analyzes the interference patterns. At least two of the laser emitters emit laser radiation in the invisible range and the analysis unit detects the object in three dimensions based on the interference patterns of the invisible laser radiation. At least one of the laser emitters emits colored laser radiation and the analysis unit deduces the object's color based on the intensity of the colored object radiation reflected by the object.

Customized temporary veneers that are configured to be temporarily installed in a customer’s mouth and provide a desired oral appearance thereto. The customized temporary veneers include a veneer body configured to extend across at least a portion of a target region of the customer’s mouth and including oral-facing and outward-facing surfaces. The oral-facing surface is configured support the customized temporary veneer relative to the target region by engagement with one or more vestibular surfaces within the target region. A plurality of oral features define at least a portion of the outward-facing surface and are configured to present the desired oral appearance. The methods may include obtaining a representation of the target region, selecting the plurality of oral features, and creating the customized temporary veneer, which includes forming the veneer body, shaping the oral-facing surface based on the representation, and providing the plurality of oral features to the outward-facing surface.