Students’ self-evaluations for “knowledge of border molding” were higher for silicone than for plaster models, and for mannequins than for plaster models. In silicone models, the edges are pressed to form the border indirectly, whereas in mannequins, the structures on the model resembling the lips or buccal mucosa hinder border molding. However, this is not the case with plaster models. Therefore, silicone models and mannequins are more suitable than plaster models for border molding practice. Furthermore, the change from silicone models to mannequins did not affect the students’ self-evaluations, indicating that the limitations created by mannequins did not have a drastic effect on evaluations compared with the change from plaster to silicone models. In addition, the evaluations for the silicone models and mannequins might have been too high to allow any differences to be seen.