Affiliation: | ∗ Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea;† Department of Maxillofacial Tissue Regeneration, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Republic of Korea;‡ Department of Conservative Dentistry, Dental Research Institute and BK 21 Program, School of Dentistry, Seoul National University, Seoul, Republic of Korea |