Investigation of the micro-fracture mechanism and establishment of new treatment on the basis of fracture control concept

• Project/Area Number: 25870195
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Conservative dentistry; Prosthodontics/ Dental materials science and
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: Watanabe Satoshi 東京医科歯科大学, 医歯(薬)学総合研究科, 助教 (50549938)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 歯根微小破折 / LAI / PUI / 微小歯根破折 / レーザー / 外科的歯内療法 / 歯根破折 / マイクロクラック / Er:YAGレーザー / 象牙質の歪

Outline of Final Research Achievements

The purpose of this study were to investigate the kinetics of root fractures produced by root-end cavity preparation and the fracture resistance following root-end cavity preparation using an Er:YAG laser and ultrasonics and to investigate the effect of laser activated irrigation to minimimize to cut root canal dentin to prevant root fracture.

Research Products

• [Journal Article] 歯内治療におけるレーザー (2016)
  • Author(s): 渡辺 聡、興地隆史
  • Journal Title: レーザー医学会雑誌 Volume: 36（4）
  • Peer Reviewed / Open Access
• [Journal Article] Application of Er:YAG Laser for Root-end Cavity Preparation in Intentional Replantation: A Case Report (2015)
  • Author(s): 渡辺 聡、興地隆史
  • Journal Title: Journal of Japanese Society for Laser Dentistry Volume: 26 Issue: 3 Pages: 130-135
  • DOI: 10.5984/jjpnsoclaserdent.26.130
  • NAID: 130005116304
  • ISSN: 0917-7450, 2185-6702
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Root surface strain during canal shaping and its influence on apical microcrack development: a preliminary investigation. (2015)
  • Author(s): 1Jamleh A, Komabayashi T, Ebihara A, Nassar M, Watanabe S, Yoshioka T, Miyara K and Suda H.
  • Journal Title: Int Endod J Volume: In press Issue: 12 Pages: 1103-1111
  • DOI: 10.1111/iej.12406
  • Peer Reviewed / Open Access
• [Journal Article] Detection of a Second Mesiobuccal Canal in Maxillary Molars by Swept Source Optical Coherence Tomography (2014)
  • Author(s): Y. Iino, A. Ebihara, T. Yoshioka, J. Kawamura, S. Watanabe, T. Hanada, K. Nakano, Y. Sumi, H. Suda
  • Journal Title: Journal of Endodontics Volume: 40 Issue: 11 Pages: 1865-1868
  • DOI: 10.1016/j.joen.2014.07.012
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Application of optical coherence tomography to identify pulp exposure during access cavity preparation using an Er:YAG laser (2014)
  • Author(s): Jiangfeng Ding, Arata Ebihara, Satoshi Watanabe, Yoshiko Iino, Chizuko Kokuzawa, Tomoo Anjo, Hideaki Suda, Yasunori Sumi
  • Journal Title: Photomed Laser Surg Volume: ３２ Issue: 6 Pages: 356-359
  • DOI: 10.1089/pho.2013.3688
  • Peer Reviewed / Open Access
• [Journal Article] Pressure Generated Outside the Apical Foramen During Er:YAG Laser-activated Irrigation (2014)
  • Author(s): 佐竹和久, 井手彩集, 八尾香奈子, 渡辺聡, 安生智郎, 海老原新, 小林千尋, 須田英明
  • Journal Title: Journal of Japanese Society for Laser Dentistry Volume: 25 Issue: 2 Pages: 70-74
  • DOI: 10.5984/jjpnsoclaserdent.25.70
  • NAID: 130004680155
  • ISSN: 0917-7450, 2185-6702
  • Peer Reviewed / Open Access
• [Journal Article] Application of optical coherence tomography to identify pulp exposure during access cavity preparation using an Er:YAG laser (2014)
  • Author(s): J. Ding, A. Ebihara, S. Watanabe, Y. Iino, C. Kokuzawa, T. Anjo, H. Suda, Y. Sumi
  • Journal Title: Photomedicine and Laser Surgery Volume: 未定
  • Peer Reviewed
• [Journal Article] Er:YAGレーザーを用いた根管洗浄時に生じる根尖孔外の圧力 (2014)
  • Author(s): 佐竹和久，井手彩集，八尾加奈子，市川勝 ，渡辺聡 ，安生智郎 ，海老原新 ，小林千尋 ，須田英明
  • Journal Title: レーザー歯学会雑誌 Volume: 未定
  • NAID: 130004680155
  • Peer Reviewed
• [Presentation] レーザーを用いた根管洗浄時における蒸気泡の挙動 (2016)
  • Author(s): 本郷智之，渡辺聡，八尾香奈子，佐竹和久，海老原新 ，興地隆史.
  • Organizer: 第23回歯科医学総会
  • Place of Presentation: 福岡国際会議場、福岡
  • Year and Date: 2016-10-21
• [Presentation] コーンビームＣＴを用いた大臼歯の根管形態評価 (2016)
  • Author(s): 池田翔太, 金應烈, 井手彩集，佐竹和久，渡辺 聡 ,興地隆史
  • Organizer: 第37回歯内療法学会
  • Place of Presentation: うぃんく愛知、名古屋
  • Year and Date: 2016-07-23
• [Presentation] 新規超音波装置を用いた根管洗浄による水酸化カルシウム材除去効果 (2016)
  • Author(s): 中島亜里沙,八尾香奈子，井手彩集，本郷智之, 佐竹和久，渡辺 聡 ,興地隆史
  • Organizer: 第37回歯内療法学会
  • Place of Presentation: うぃんく愛知、名古屋
  • Year and Date: 2016-07-23
• [Presentation] Kinetics of Cavitation Bubbles during Diode Laser-Activated Root Canal Irrigation (2016)
  • Author(s): T Hongo, Si Watanabe, A Ide, K Satake, K Yao, A Ebihara, C Kobayashi and T Okiji
  • Organizer: 2016 IADR/APR General Session
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2016-06-22
  • Int'l Joint Research
• [Presentation] 次亜塩素酸ナトリウム溶液を半導体レーザーにて活性化させた根管洗浄における (2016)
  • Author(s): 渡辺聡，本郷智之，井手彩集，八尾香奈子，佐竹和久 ，海老原新 ，興地隆史
  • Organizer: 第144回春季保存学会
  • Place of Presentation: 栃木県総合文化センター、栃木
  • Year and Date: 2016-06-09
• [Presentation] Pressure Generated Outside the Apex During Root Canal Irrigation (2015)
  • Author(s): S Watanabe, K Yao, K Satake, T Hongo, A Ebihara, C Kobayashi, and T Okiji.
  • Organizer: The 17th JSCD-KACD Joint Meeting Program
  • Place of Presentation: Cibic center,Tokyo
  • Year and Date: 2015-11-12
  • Int'l Joint Research
• [Presentation] Er:YAGレーザーを利用した根管洗浄の根管側枝清掃効果 (2015)
  • Author(s): 八尾香奈子，渡辺 聡，本郷智之, 佐竹和久，海老原新 ，小林千尋，興地隆史.
  • Organizer: 第143回秋期保存学会
  • Place of Presentation: シビックセンター、東京
  • Year and Date: 2015-11-12
• [Presentation] 半導体レーザーを用いた根管洗浄時における蒸気泡の挙動. (2015)
  • Author(s): 本郷智之，渡辺聡，八尾香奈子，佐竹和久，海老原新 ，小林千尋，興地隆史.
  • Organizer: 第143回秋期保存学会
  • Place of Presentation: シビックセンター、東京
  • Year and Date: 2015-11-12
• [Presentation] Er:YAGレーザーを外科的歯内療法に応用した症例 (2015)
  • Author(s): 渡辺聡, 佐竹和久, 八尾香奈子, 海老原新, 小林千尋, 興地隆史
  • Organizer: 第27回レーザー歯学会
  • Place of Presentation: 北海道自治労会館、札幌
  • Year and Date: 2015-06-06
• [Presentation] Watanabe S, Hanada T, Kobayashi C, and Suda H. Root canal irrigation activated by new diode laser system and Er:YAG laser. (2015)
  • Author(s): Watanabe S, Hanada T, Kobayashi C, and Suda H.
  • Organizer: ALD2015
  • Place of Presentation: Palm Springs
  • Year and Date: 2015-02-07
  • Invited
• [Presentation] Extrusion of Root Canal Irrigants during Root Canal Irrigation Activated by Diode Laser. (2015)
  • Author(s): Yao K, Watanabe S, Ebihara A, Kobayashi C.
  • Organizer: ALD2015
  • Place of Presentation: Palm Springs
  • Year and Date: 2015-02-07
• [Presentation] Er:YAGレーザーおよび半導体レーザーを用いた根管洗浄時に生じる根尖孔外への洗浄液の溢出量 (2014)
  • Author(s): 佐竹和久, 井手彩集, 八尾香奈子, 渡辺聡, 安生智郎, 海老原新, 小林千尋, 須田英明
  • Organizer: 第26回日本レーザー歯学会
  • Place of Presentation: 東京
  • Year and Date: 2014-12-02
• [Presentation] Pressure generated outside the apical foramen during root canal irrigation activated by diode laser. (2014)
  • Author(s): Watanabe S, Yao K, Satake K, Ichikawa M, Anjo T, Ebihara A, Kobayashi C, and Suda H.
  • Organizer: 14thWFLD
  • Place of Presentation: Paris
  • Year and Date: 2014-07-04
• [Presentation] Er:YAG Laser-activated Irrigation for Lateral Canals: Induced Cleaning Effect of Lasing Apart From the Lateral Canals. (2014)
  • Author(s): Yao K, Watanabe S, Ide A, Satake K, Ichikawa M, Anjo T, Ebihara A, Kobayashi C, and Hideaki S.
  • Organizer: 14thWFLD
  • Place of Presentation: Paris
  • Year and Date: 2014-07-03
• [Presentation] Satake K, Watanabe S, Ichikawa , Anjo T, Ebihara A, Kobayashi C, Suda H. Apical Extrusion of Root Canal Irrigants during Root Canal Irrigation Activated by Diode Laser. (2014)
  • Author(s): Satake K, Watanabe S, Anjo T, Ebihara A, Kobayashi C, Suda H.
  • Organizer: 14thWFLD
  • Place of Presentation: Paris
  • Year and Date: 2014-07-03
• [Presentation] Er:YAGレーザーを利用した根管側枝の洗浄：離れた位置からの照射における洗浄効果 (2014)
  • Author(s): 八尾香奈子，市川勝 ，佐竹和久，渡辺聡 ，安生智郎 ，海老原新，小林千尋 ，須田英明
  • Organizer: 第１４1回保存学会
  • Place of Presentation: 岐阜
  • Year and Date: 2014-06-19
• [Presentation] Pressure generated outside the apical foramen during root canal irrigation activated by diode laser
  • Author(s): Satoshi Watanabe, Ayai Ide, Kanako Yao, Kazuhisa Satake, Masaru Ichikawa, Tomoo Anjo, Arata Ebihara, Chihiro Kobayashi, and Hideaki Suda
  • Organizer: The WFLD 2014 Paris Congress
  • Place of Presentation: Paris
• [Presentation] Apical Extrusion of Root Canal Irrigants during Root Canal Irrigation Activated by Diode Laser
  • Author(s): 2. Kazuhisa Satake, Ayai Ide, Kanako Yao, Masaru Ichikawa, Satoshi Watanabe, Tomoo Anjo, Arata Ebihara, Chihiro Kobayashi, and Hideaki Suda
  • Organizer: The WFLD 2014 Paris Congress
  • Place of Presentation: Paris
• [Presentation] Er:YAG Laser-activated Irrigation for Lateral Canals: Induced Cleaning Effect of Lasing Apart From the Lateral Canals
  • Author(s): 1. Kanako Yao , Ayai Ide, Kazuhisa Satake, Masaru Ichikawa, Satoshi Watanabe, Tomoo Anjo, Arata Ebihara, Chihiro Kobayashi, and Hideaki Suda
  • Organizer: The WFLD 2014 Paris Congress
  • Place of Presentation: Paris
• [Presentation] Dentin strain produced by root-end cavity preparation using Er:YAG laser
  • Author(s): S.Watanabe
  • Organizer: The 9th World Endodontic Congress
  • Place of Presentation: Tokyo
• [Presentation] Dentin strain produced by root-end cavity preparation using Er:YAG laser
  • Author(s): S.Watanabe,A.Ebihara, C. Kobayashi, H.suda
  • Organizer: The 3rd Tri-University Consortium on Oral Science and Education
  • Place of Presentation: Tokyo
• [Presentation] Pressure generated outside the apex during Er:YAG laser activated irrigation
  • Author(s): K. Satake, S. Watanabe, T. Anjo, A. Ebihara, C. Kobayashi, H. Suda
  • Organizer: IADR-APR
  • Place of Presentation: Bankok
• [Presentation] Root canal irrigation pressure generated outside the apipcal foramen during Er:YAG laser-activated irrigation
  • Author(s): K.Yao, S. Watanabe, T. Anjo, A. Ebihara, C. Kobayashi, H. Suda
  • Organizer: The 15th Joint Scientific Meeting between the JSCD and KACD
  • Place of Presentation: Gyeongju
• [Presentation] Ability of Optical Coherence Tomography to Identify Pulp Exposure during Access Cavity
  • Author(s): Jiangfeng Ding, Satoshi Watanabe, Yoshiko Iino, Chizuko Kokuzawa, Tomoo Anjo, Arata Ebihara, Hideaki Suda
  • Organizer: The 9th World Endodontic Congress
  • Place of Presentation: Tokyo
• [Presentation] The ability of optical coherence tomography to image bone lesion: comparison between porcine Maxilla and Mandible
  • Author(s): J. Ding, S. Watanabe, T. Anjo, Y. Iino, C. Kokuzawa, A. Ebihara, H. Suda
  • Organizer: 第138回日本歯科保存学会
  • Place of Presentation: 福岡市
• [Presentation] Er:YAGレーザーを用いた根管洗浄時に生じる根尖孔外の圧力
  • Author(s): 佐竹和久, 八尾香奈子、市川勝、渡辺聡、安生智郎、海老原新、小林千尋、須田英明
  • Organizer: 日本レーザー歯学会
  • Place of Presentation: 東京
• [Presentation] SS-OCTによる上顎大臼歯近心頬側第二根管の検出
  • Author(s): 飯野由子, 河村隼、渡辺聡、吉岡俊彦、花田隆周、中野生和子、海老原新、島田康史、田上順次、角保徳
  • Organizer: 第139回日本歯科保存学会
  • Place of Presentation: 秋田市
• [Presentation] Er:YAGレーザーを用いた根管洗浄時に生じる根尖孔外の圧力-照射距離による影響-
  • Author(s): 佐竹和久, 八尾香奈子、市川勝、渡辺聡、安生智郎、海老原新、小林千尋、須田英明
  • Organizer: 第139回日本歯科保存学会
  • Place of Presentation: 秋田市
• [Presentation] Er:YAGレーザーを用いた根管洗浄時に生じる根尖孔外への洗浄液の溢出量および溢出距離
  • Author(s): 市川勝, 八尾香奈子、佐竹和久、渡辺聡、安生智郎、海老原新、小林千尋、須田英明
  • Organizer: 第139回日本歯科保存学会
  • Place of Presentation: 秋田市
• [Presentation] 第139回日本歯科保存学会
  • Author(s): 八尾香奈子, 市川勝、佐竹和久、渡辺聡、安生智郎、海老原新、小林千尋、須田英明
  • Organizer: 第139回日本歯科保存学会
  • Place of Presentation: 秋田市
• [Presentation] 新しい根管充填用MTA(Ortho MTA)を用いた根管充填法の評価
  • Author(s): 岸美沙子, 鈴木規元、渡辺聡, 須田英明
  • Organizer: D4研究体験実習発表会
  • Place of Presentation: 東京
• [Book] ザクインテッセンス (2016)
  • Author(s): 西条美紀、渡辺聡、興地隆史
  • Total Pages: 232
  • Publisher: クインテッセンス出版
• [Book] ザクインテッセンス (2015)
  • Author(s): 佐竹和久、渡辺聡、興地隆史
  • Total Pages: 209
  • Publisher: クインテッセンス出版
• [Book] クインテッセンス出版 (2015)
  • Author(s): 若林安美子、渡辺聡、興地隆史
  • Total Pages: 234
  • Publisher: ザクインテッセンス