Method for extracting margin line at artificial crown designing.

摘要

Rate of variation of data representing the shape of an abutment tooth are determined, and a train of points is extracted from the rate of variation. Then a developed view of the surfacial shape of the abutment tooth is displayed, and the obtained train of points is also displayed in the developed view. The margin line for designing the artificial crown is determined, based on thus displayed train of points. <IMAGE> <IMAGE>