Silicone models (G10-X1231A, Nissin Dental Products Inc., Kyoto, Japan) have been used in practical training since 2009. Silicone models have elastic qualities, high edges, and simulated tongues, and they are therefore more similar to the oral mucosa than plaster models. In 2010, all dental students were provided with mannequins (Phantom DR-11, J. Morita Mfg. Corp., Kyoto, Japan) in which silicone models could be placed; this allowed better replication of clinical conditions than working with a silicone model alone.