1. Department of Oral and Maxillofacial Surgery,
2. Institute for Oral Science,
3. Department of Oral Microbiology, and
4. Department of Orthodontics, Matsumoto Dental University School of Dentistry, 1780 Gobara Hirooka, Shiojiri, Nagano 399-0874, Japan; and
5. Regenetiss Inc., 1-5-17, Akabane, Okaya, Nagano 394-0002, Japan