1. Department of Hard Tissue Research, Institute for Oral Science Matsumoto Dental University Shiojiri Japan
2. School of Dentistry Shanxi Medical University Taiyuan China
3. Center of Health‐Care in Stomatology Tenth People's Hospital of Tongji University Shanghai China
4. Department of Oral Health Promotion, Institute for Oral Science Matsumoto Dental University Shiojiri Japan
5. Department of Oral and Maxillofacial Surgery, School of Dentistry Matsumoto Dental University Shiojiri Japan