Method and dental restorative system for determining dental restorations

摘要

The invention relates to a method for determining virtual tooth restorations on the basis of scan data (D) of oral structures, in which a model database (DB) is used which contains a number of parameterized tooth models (M) for different tooth types, the parameterization being based on of model parameters, which include position and / or shape parameters and each tooth model (M) is linked (L) to a number of tooth models (M) of the same tooth type. For each desired tooth type, an optimal tooth model (M) is determined from the model database (DB) by an iterative process, in which at least one starting tooth model (M) of the desired tooth type is selected from the model database (DB) and then starting with this start -Tooth model (M) with each iteration step (S) a tooth model (M) is tested for a quality value. The tooth model (M) currently being tested is adapted to the scan data (D) by varying model parameters for individualization and a quality value is calculated for the individualization. In addition, at least one tooth model (M) linked to the tooth model to be tested is also individualized and a quality value is calculated. Based on the calculated quality values, a new tooth model (M) of the desired tooth type to be tested is selected from the model database (DB) for the next iteration step (S). The iteration is terminated when a quality criterion is reached and at least one virtual tooth restoration (R) is finally determined from the optimal tooth models (M) and scan data (D). In addition, a method for generating a model database (DB) for use in such a method, a method for producing or selecting a tooth restoration part and a tooth restoration determination system (5) for determining virtual tooth restorations (R) are described.