1. Department of Prosthodontics, School of Dentistry and Institute of Oral Bio-Science, Chonbuk National University, Jeonju, Republic of Korea.
2. Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, Republic of Korea.
3. Department Dental Biomaterials, Institute of Oral Bio-science, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea.