Institut Straumann Ag

Dentsply International Inc.

Sirona Dental Systems Gmbh

Aepsilon, Gmbh

Albert Mehl

Gerhard Weber

Stephan Holzner

Wolfram Gloger

Wolfgram Gloger

A method and apparatus related to forming prosthetic dental items or tooth restorations. A defective tooth, prosthetic dental item, or a dentition is scanned. A first electronic data set from a three-dimensional scan of a defective tooth, defective prosthetic dental item, or the dentition is generated, and one or more correspondence points or structure in the first electronic data set are assigned to one or more corresponding points or structures in a second electronic data set. The second electronic data set represents a tooth model. To generate a patient specific tooth model, the tooth model is adjusted such that a function which describes one or more distances between the one or more correspondence points or structures in the first electronic data set and the one or more corresponding points or structures in the second electronic data set is minimized.

Method for producing denture parts or for tooth restoration using electronic dental representations

A surface mapping and generating device which has devices for the process and/or cost optimization, in particular raw material recovery devices, an automatic control of the intensity of a used laser light, devices for carrying out a calibrating procedure by evaluating overlap errors at matching points, devices for archiving especially three-dimensional data of the jaw and/or for modeling the bite position of the upper and the lower jaws, devices for the optimized preparation of at least one dental stump for the production and placement of a dental prosthesis thereon and/or devices for taking into consideration the bite position of the upper and lower jaws. It can be provided that the devices for the process and/or cost optimization are designed to ensure that two half frames showing different positions or views are evaluated, whereby preferably a pulsed laser for exposure purposes is included and/or that an image recording device, in particular a CCD chip, is arranged so as to ensure that lines, taking into account the Scheimpflug angle, are located perpendicular to the direction of travel of a measuring table. Methods according to the present invention use such devices and function correspondingly. In addition, the invention also makes available a patient data archiving system which comprises a chip card and/or decentralized data storage systems especially for dental data.

Surface mapping and generating devices and methods for surface mapping and surface generation

The invention relates to a method for producing denture parts or for tooth restoration. According to said method, to reconstruct a tooth requiring repair or a defective condition, at least some of the missing exterior surfaces of denture parts or tooth restorations are adapted to the existing residual tooth material and/or the opposing teeth and/or the position of the neighbouring tooth and/or the occlusion position, by means of the optimisation of a generic dental-model data record of the desired tooth type, thus varying the linear factors of at least the most important components, (determined from the electronic data records of a larger number of measured tooth surfaces by primary axis analysis methods), in such a way that the selected optimisation criteria are fulfilled by the minimisation of an error function. After the successful adaptation of said surfaces to the residual occlusion position and the completion of the data record, the reconstructed denture part or the reconstructed tooth restoration is machine-manufactured.

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Holzkirchen, Germany

Albert Mehl