1. Department of Dental Biomaterials Science; Seoul National University School of Dentistry & Dental Research Institute; Seoul Korea
2. Department of Conservative Dentistry; Institute of Oral Health Science; Ajou University School of Medicine; Suwon Korea
3. Department of Conservative Dentistry; Seoul National University School of Dentistry & Dental Research Institute; Seoul Korea
4. Department of Materials Science & Engineering; Seoul National University; Seoul Korea