The present. invention is related to a method for fabricating a dental appliance, said method comprising: i) providing a digital data set representing a modified tooth arrangement for a patient ii) controlling a fabrication machine based on the digital data set to produce a negative model of the modified tooth arrangement which can be used as a mold iii) creating a positive model of the modified tooth arrangement by casting said mold with a curable material, and producing the dental appliance as a negative of the positive model.
