1. Department of Prosthodontics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
2. Department of Oral & Maxillofacial Surgery, Seoul National University Bundang Hospital, Seongnam, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea.
3. Department of Prosthodontics, Seoul National University Bundang Hospital, Seongnam, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea.