1. Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
2. Department of Oral Rehabilitation and Implantology, Okayama University Hospital, Okayama, Japan
3. SHIKEN Corporation, Komatsushima, Japan
4. Dental Technician Laboratory, Okayama University Hospital, Okayama, Japan