1. Department of Prosthodontics, School of Dentistry, A3DI, Kyungpook National University, Daegu, Republic of Korea.
2. Department of Oral and Maxillofacial Radiology, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.
3. Department of Bio-medical Research Institute, A3DI, Kyungpook National University Hospital, Daegu, Republic of Korea.
4. Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea.