1. Department of Oral and Maxillofacial Prosthodontics, Field of Oral and Maxillofacial Rehabilitation, Advanced Therapeutic Course; Kagoshima University Graduate School of Medical and Dental Sciences; Kagoshima Japan
2. Denture Prosthodontic Restoration, Advanced Dentistry Center; Kagoshima University Medical and Dental Hospital; Kagoshima Japan
3. Geriatric Health Service Facility “Aitoyuinomachi”; Kagoshima Japan