1. Department of Dental Biomaterials, Institute of Biodegradable Materials, BK21 plus Program, School of Dentistry, Chonbuk National University
2. Department of Dental Technology, Gwangju Health College
3. Research Institute of Clinical Medicine of Chonbuk National University, Biomedical Research Institute of Chonbuk National University Hospital
4. Department of Prosthodontics, School of Dentistry, Chonbuk National University