1. Department of Dental Biomaterials and Institute of Biodegradable material, Institute of Oral Bioscience, School of Dentistry, Jeonbuk National University 1 , Jeonju 54896, South Korea
2. Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital 2 , Jeonju 54907, South Korea
3. 3 Department of Prosthodontics and Institute of Oral Bio-Science, School of Dentistry, Jeonbuk National University, Jeonju 54896, South Korea