The dental curriculum for complete denture prosthodontics at Tokyo Medical and Dental University (TMDU) consists of lectures and practical training in the fourth year and clinical training in the fifth and sixth years. As part of practical training, students practice border molding in the practice room. Previously, students used plaster models to pattern impression material (Impression Compound, Kerr Corp., Orange, CA, USA) in custom impression trays. Students learning border molding should replicate clinical conditions as closely as possible during practical training in order to improve their skills ; however, the operation of the plaster model in the practice room is quite different from that actually experienced in the clinical setting. Therefore, the objective of this study was to gain familiarity with the actual materials used in border molding, not the technique itself.