[1] Division of Preventive Dentistry, Department of Oral Health and Development Sciences, Tohoku University, Graduate School of Dentistry, Sendai
[2] Department of Oral and Maxillofacial Surgery, Tohoku Kosai Hospital, Sendai
[3] Department of Dentistry and Oral and Maxillofacial Surgery, Hamamatsu University, School of Medicine, Hamamatsu
[4] Department of Surgery, Tohoku Kosai Hospital, Sendai