1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju 61452, Repulic of Korea
2. Oral Biology Research Institute, Chosun University, Gwongju 61452, Republic of Korea
3. Department of Oral and Maxillofacial Surgery, Chosun Universtiy Dental Hospital, Gwangju 61452, Repulic of Korea