Designing a virtual preparation and a virtual gingival

A computer program product encoded on a non-transitory computer readable medium for generating a digital 3D combined model for use in planning and visualization of a dental component based on a digital 3D model of the dental component showing a desired shape of the teeth of the dental component and a digital 3D representation of a pre-prepared set of teeth showing the region for which the dental component is intended, said computer program product comprising computer-executable instructions for causing a data processing system to generate a digital 3D combined model representing a target dental situation for the patient when the dental component is arranged at the teeth, where the computer-executable instructions are configured for digitally replacing one or more teeth of the digital 3D representation of the pre-prepared set of teeth with the digital 3D model of the dental component by digitally removing the one or more teeth of the digital 3D representation of the pre-prepared set of teeth and digitally adding the digital 3D model of the dental component to the digital 3D representation of the pre-prepared set of teeth.