Affiliation: | 1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, , Seoul, Korea;2. Department of Periodontology, College of Dentistry, Yonsei University, , Seoul, Korea;3. Dentium, , Seoul, Korea;4. Institute of Physics and Applied Physics and Atomic‐Scale Surface Science Research Center, Yonsei University, , Seoul, Korea |