1. Department of Dental Hygiene, Gwangju Health University, Gwangju 62287, Republic of Korea
2. Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
3. Biomedical Evaluation and Research Centre, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
4. Department of Medical Engineering Joint Research, Chonnam National University, Gwangju 61186, Republic of Korea