1. Department of Removable Prosthodontics, Tsurumi University School of Dental Medicine, Kanagawa, Japan.
2. Center of Maxillofacial Implantology, Tsurumi University School of Dental Medicine, Kanagawa, Japan.
3. Department of Prosthodontics, Stomatological School of Capital Medical University, Beijing, China.
4. Department of Dental Engineering, Tsurumi University School of Dental Medicine, Kanagawa, Japan.
5. Prosthodontics & Oral Implantology, Graduate School, Kanagawa Dental University, Kanagawa, Japan.
6. Department of Mechanical Engineering, Toyohashi University of Technology, Aichi, Japan.