1. Department of Oral and Maxillofacial Surgery, Korea University Guro Hospital, 148, Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea
2. Graduate School of Clinical Dentistry, Korea University, 46, Gaeunsa 2-gil, Seongbuk-gu, Seoul 02842, Republic of Korea
3. Department of Prosthodontics, Korea University Guro Hospital, 148, Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea
4. Department of Prosthodontics, Korea University Anam Hospital, 73, Goryeodae-ro, Seongbuk-gu, Seoul 02841, Republic of Korea