In the case of adults, problems can be avoided by storing a working model, but then the storage space for the models becomes necessary. Problems also occur in the fabrication process. In the conventional fabrication method of hot-pressure molding of a sheet, the thickness is difficult to control in the anterior area, molar area, etc., and differences in thickness can also arise depending on the original thickness [12] and color [13] of the sheet. If a thickness difference is present, the location of occlusal support changes and affects the position of the mandible, which has also been noted as a problem [14]. We decided to explore digital technology to solve these problems. Various types of digital technology are already used in dentistry [15]. Optical impression taking and CAD/CAM technology has been applied in prosthesis fabrication, and CAD/CAM is already covered by insurance. There have also been attempts to create surgical assistance devices using CAD/CAM [16,17]. 3D printers have also been used clinically to enable fabrication of surgical guides for implants and mandible models for reference during oral surgery. Optical impression taking is effective for patients who have a gag reflex without the risk