1. Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
2. Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Osaka University, Suita, Japan
3. Human Informatics and Interaction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
4. Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Suita, Japan
5. Division of General Dentistry 4, The Nippon Dental University Hospital, Tokyo, Japan