Abstract
Purpose：In this report we consider the making method of complete dentures, and must be refinement alveolar ridge lines of measuring interalveolar ridge lines. We think that have to easily new drawing method useful of dentistry’s undergraduate course and clinical dental medicine. We then attempt to establish a new drawing method of alveolar ridge lines for the making of complete dentures. Methods：In experiment 1, 10 subjects drew alveolar ridge lines for measuring interalveolar ridge lines to 5 maxillary/mandibular couple casts. We investigated the results and made a hypothesis for new method of alveolar ridge lines, as well as a drawing new method for alveolar ridge lines for making bite plates and arranging artificial teeth. In experiment 2, 10 subjects drew new alveolar ridge lines to the same casts, and we investigated the results. Conclusions：The new method of alveolar ridge lines can ① be nearer to denture’s tooth line, ② include most of alveolar crest ridge, ③ show fewer personal differences with drawn lines than alveolar ridge lines for measurement of interalveolar ridge lines, ④ be little influence of reduction in alveolar ridge.
