Method for manipulating a dental virtual model, method for creating physical entities based on a dental virtual model thus manipulated, and dental models thus created

A system for generating missing data for 3D models of intraoral structures of a patient, the system comprising:

• a hand-held intraoral scanner;
• a computer having instructions that, when executed, cause the system to:
• scan, using the hand-held intraoral scanner, the intraoral structure of a patient to generate first 3D data of a prepared tooth of the intraoral structure of the patient;
• generate a 3D virtual model of the prepared tooth of the intraoral structure of the patient based on the first 3D data;
• determine the 3D virtual model does not include portion of a finish line of the prepared tooth of the portion of the intraoral structure of the patient;
• generate second 3D data based on the 3D virtual model, the second 3D data including an approximated surface that approximates the portion of the surface of the finish line;
• and
• combine the second 3D data with the 3D virtual model such that the 3D virtual model includes the approximated surface.

A system for generating missing data for 3D models of intraoral structures of a patient, the system comprising:

• generate a 3D virtual model of the intraoral structure of the patient based on first 3D data generated from an intraoral scan of focused light on a surface of the intraoral structure of the patient;
• determine of the 3D virtual model does not include a portion of a surface of the intraoral structure of the patient;
• generate, in an automated manner, second 3D data including an approximated surface that approximates the portion of the surface of the intraoral structure of the patient;
• and
• combine the second 3D data with the 3D virtual model such that the 3D virtual model includes the approximated surface.