#$%^&*AU2018236686A120181011.pdf#####ABSTRACT A current digital dental model is received that includes a representation of the set of physical teeth for the patient with the current dental appliance attached to the physical teeth or oral cavity. The current digital dental model is a direct digital scan of the set of physical teeth and the current dental appliance. The physical teeth are at a position in treatment when all or a part of the current dental appliance is desired to be removed from one or more of the set of physical teeth and it is desired to use a subsequent appliance. The current digital dental model is created based a new digital dental model that includes the representation of the set of physical teeth without including the current dental appliance.WO 2014/037778 PCT/IB2013/001832 9115 SYSTEM 900 CURRENT-DIGITAL-DENTAL-MODEL-RECEIVING-COMPONENT 910 NEW- DIGITAL-DENTAL-MODEL-CREATION-COMPONENT 920 FIG. 9 0BEGIN 1000 RECEIVE A CURRENT DIGITAL TEETH MODEL 1020 CREATE BASED ON THE CURRENT TEETH MODEL, A NEW DIGITAL TEETH MODEL 1030 PROVIDE DIGITAL DATA SUITABLE FOR USE IN MANUFACTURING THE SUBSEQUENT DENTAL APPLIANCE BASED ON ELECTRONIC DATA INCLUDED IN THE NEW DIGITAL DENTAL MODEL 1040 END 105 FIG. 10