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*Jun-ichi Otogoto
Department of Periodontology, Matsumoto Dental University Division of Periodontology, Oral Health Science, Depart of Oral Health Promotion, Matsumoto Dental University
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Norio Ota
Department of Periodontology, Matsumoto Dental University Division of Periodontology, Oral Health Science, Depart of Oral Health Promotion, Matsumoto Dental University
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Akio Yamamoto
Department of Restorative and Endodontic Dentistry, Matsumoto Dental University
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Akihiro Kuroiwa
Department of Removable Prothodontics, Matsumoto Dental University