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2144results about "Artificial teeth" patented technology

Material for a dental prosthesis, method and device for determining the shape of a remaining tooth area to be provided with a dental prosthesis, method and arrangement for producing a dental prosthesis and use of the arrangement

Material for a dental prosthesis consisting of fiber glass reinforced plastic. The material is used to produce a blank by means of a special injection-molding process, which can be worked by means of a machining process. A method and a device for determining the shape of a duplicate of a remaining tooth area to be provided with a dental prosthesis. The shape of the duplicate is determined, as is the shape of duplicate sections into which the duplicate has been divided, the determined data are stored and combined. A method and arrangement for producing a dental prosthesis. The shape of a duplicate (42) of a remaining tooth area to be provided with the dental prosthesis is determined by means of a shape determination device (110), the determined data are stored in the form of digital data (DD), and the dental prosthesis (143) is produced in a production machine (114), which is controlled by means of production data (FD). The shape determination device (110) and the production machine (114) are coupled by means of an EDP installation (118), which contains a memory unit for storing the digital data (DD) and performs the calculation of the production data (FD).
Owner:STRAUMANN HLDG AG +2

Preparation for being fastened on a natural tooth part or tooth and corresponding fastening method

A preparation (10, 11,12,13) to be fixed to a natural tooth part or tooth, in particular for the replacement of a load-bearing tooth part, is for example a filling for a drilled-out tooth (1), a crown, bridge or prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a tooth root for fastening an artificial tooth, a bridge or a prosthesis. The preparation has surface regions which consist of a material with thermoplastic properties. The preparation (10, 11, 12,13) is designed in a manner such that it has oscillation properties with such low damping losses that for a liquefaction of the material with thermoplastic properties by way of oscillations there are local stress concentrations required, and in a manner such that such stress concentrations only occur in the region of the preparation surface. The preparation is positioned on a suitably prepared natural tooth part in a manner such that the material with the thermoplastic properties is in contact or may be brought into contact with the dentin surface and/or enamel surface. The preparation is then made to mechanically oscillate and is simultaneously pressed against the natural tooth part, whereby the material with the thermoplastic properties is at least partly liquefied and brought into intimate contact with the dentin or enamel surface in a manner such that after solidification it forms a positive fit and/or material fit connection. Teeth restored with such preparations have a high stability and a long life, which in particular is attributed to the fact that the thermoplastic material, in contrast to cements used for the same purpose, shrinks less and has the ability to relieve internal stress by creeping.
Owner:WOODWELDING

Method, apparatus and system for automated tooth shade analysis and matching

Methods, apparatuses and systems for tooth shade analysis and matching are disclosed. A method embodiment according to the invention includes acquiring at least one image, the image including one or more teeth of a patient and normalization references, normalizing the at least one image in accordance with the normalization references, determining the color of the teeth as composed of colors from one or more selected shade standards, communicating the standardized color information to a dental laboratory, manufacturing a dental prosthesis based on the standardized color information and installing the dental prosthetic. Normalization is performed to correct patient images for variations in lighting conditions and image source. Normalization references include a black reference, a white reference and at least one color reference. The normalized image is standardized by matching the pixels of the normalized image to selected shade standards. Selected shade standards may include incisal tooth shade standards. The standardized color image and / or analysis may be communicated to a dental laboratory according to aspects of the invention. The dental prosthesis can then be manufactured by a lab technician by referring to the standardized image. Color models according to the invention may include RGB, HSI and other models for representing color images. The methods, apparatuses and systems for tooth shade analysis and matching are also applicable to direct restorations of natural teeth, such as repair of chipped or broken teeth.
Owner:DENTECH
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