Traditional methods for the production of indirect restorations usually include impression making, die or model making and final manufacture. Inaccuracies can occur at any stage, and if introduced early on, may have an exaggerated effect on the final restoration. Costs can be high, in terms of clinical and laboratory time and expertise. The costs of producing remake restorations must be borne either by the dentist or the laboratory. Extra chairside time and visits are unwelcome to the patient, who may find them inconvenient and stressful.