1. Dental Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
2. Department of Periodontology, Dental Research Institute, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
3. Department of Dentistry, Chonnam National University Hwasun Hospital, Hwasun, Republic of Korea
4. Hard-tissue Biointerface Research Center, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea