The invention describes a method for the geometrical analysis of scan data from oral structures, comprising the steps of selecting a number of parameterized tooth models of desired tooth types according to the scan data to be analyzed, whereby each tooth model comprises at least one boundary line whose path is defined by line parameters and which divides a tooth model in at least one active adjustment area and at least one inactive adjustment area, and segmenting the scan data on the basis of individualized tooth models and individualized boundary lines and/or determining at least one boundary line in the scan data. The invention further describes a method of generating a model database and an analysis system for the geometrical analysis of scan data from oral structures.
