Elucidation of the mechanism of cavitation by LAI and clinical application of new tip for LAI

• Project/Area Number: 15K20398
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Conservative dentistry
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: SATAKE Kazuhisa 東京医科歯科大学, 歯学部, 非常勤講師 (90707259)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: Er:YAGレーザー / 半導体レーザー / キャビテーション / 根管洗浄 / 根管側枝 / 蒸気泡 / 高速度カメラ / 圧力測定

Outline of Final Research Achievements

The aim of this research is to elucidate the kinetics of cavitation agitated by LAI(Laser-Activated Irrigation) and establish the clinical application of the new tips of LAI.
We investigated the root canal irrigation pressure generated outside the apical foramen. It showed that LAI is relatively safer than a conventional irrigation using only syringe and the irrigation activated by Er:YAG laser will be recommended in the future.
Furthermore, we found that the irrigation activated by Er:YAG laser is more effective than a conventional irrigation in the efficacy of irrigation through lateral canals.

Research Products

• [Journal Article] Effect of laser energy and tip insertion depth on the pressure generated outside the apical foramen during Er:YAG laser-activated root canal irrigation (2017)
  • Author(s): Yao K, Satake K, Watanabe S, Ebihara A, Kobayashi C, Okiji T.
  • Journal Title: Photomedicine and Laser Surgery Volume: 35 Issue: 12 Pages: 682-687
  • DOI: 10.1089/pho.2017.4268
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Apical Extrusion of Irrigating Solution during Root Canal Irrigation Activated by Er:YAG Laser : Effect of Tip Insertion Depth (2017)
  • Author(s): 渡辺聡，高野晃，本郷智之，佐竹和久，井手彩集，八尾香奈子，興地隆史．
  • Journal Title: Journal of Japanese Society for Laser Dentistry Volume: 28 Issue: 2+3 Pages: 31-35
  • DOI: 10.5984/jjpnsoclaserdent.28.31
  • NAID: 130006351379
  • ISSN: 0917-7450, 2185-6702
  • Peer Reviewed
• [Presentation] 高野晃, 渡辺聡, 本郷智之, 八尾香奈子, 佐竹和久, 興地隆史. Er:YAGレーザーを用いた根管洗浄時に生じる蒸気泡の挙動-チップ形態による影響-. (2017)
  • Author(s): 高野晃, 渡辺聡, 本郷智之, 八尾香奈子, 佐竹和久, 興地隆史.
  • Organizer: 第38回日本歯内療法学会学術大会
• [Presentation] Er:YAGレーザーを利用した根管洗浄：離れた位置における清掃効果. (2017)
  • Author(s): 星原康宏，渡辺聡，高野晃，本郷智之，八尾香奈子，井手彩集，佐竹和久，興地隆史.
  • Organizer: 第147回日本歯科保存学会学術大会
• [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，八尾香奈子，佐竹和久，井手彩集，渡辺聡，興地隆史.
  • Organizer: 第23回日本歯科医学会総会
  • Place of Presentation: 福岡国際会議場/福岡サンパレス （福岡県福岡市）
  • Year and Date: 2016-10-22
• [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回日本歯内療法学会学術大会
  • Place of Presentation: ウインクあいち (愛知県名古屋市）
  • 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回日本歯内療法学会学術大会
  • Place of Presentation: ウインクあいち (愛知県名古屋市）
  • Year and Date: 2016-07-23
• [Presentation] Pressure Generated Outside the Apical Foramen During Root Canal Irrigation Activated by Lasers, Ultrasonic and Sonic Systems. (2016)
  • Author(s): Watanabe S, Ide A, Yao K, Satake K, Hongo T, Ebihara S, Kobayashi C, Okiji T.
  • Organizer: The 15th Congress of the World Federation for Laser Dentistry
  • Place of Presentation: Nagoya (Japan)
  • Year and Date: 2016-07-17
  • Int'l Joint Research
• [Presentation] Kinetics of Cavitation Bubbles during Diode Laser-activated Root Canal Irrigation. (2016)
  • Author(s): Hongo T, Watanabe S, Ide A, Satake K, Yao K, Ebihara A, Okiji T.
  • Organizer: The 15th Congress of the World Federation for Laser Dentistry
  • Place of Presentation: Nagoya (Japan)
  • Year and Date: 2016-07-17
  • Int'l Joint Research
• [Presentation] Kinetics of Vaporized Cavitation Bubbles during Root Canal Irrigation Activated by Diode Laser. (2016)
  • Author(s): Hongo T, Watanabe S, Ide A, Satake K, Yao K, Ebihara A, Kobayashi C, Okiji T.
  • Organizer: 94th General Session and Exhibition of the IADR
  • Place of Presentation: Seoul (Korea)
  • Year and Date: 2016-06-25
  • Int'l Joint Research
• [Presentation] 次亜塩素酸ナトリウムを半導体レーザーにて活性化させた根管洗浄における根管側枝への軟組織溶解作用. (2016)
  • Author(s): 渡辺聡，本郷智之，井手彩集，佐竹和久，八尾香奈子，海老原新，興地隆史.
  • Organizer: 日本歯科保存学会2016年度春季学術大会(第144回)
  • Place of Presentation: 栃木県総合文化センター（栃木県宇都宮市）
  • Year and Date: 2016-06-09
• [Presentation] 半導体レーザーを用いた根管洗浄時におきる蒸気泡の挙動. (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回日本歯科保存学会学術大会
  • Place of Presentation: 文京シビックホール（東京）
  • Year and Date: 2015-11-13
• [Presentation] Er:YAGレーザーを利用した根管洗浄の根管側枝洗浄効果. (2015)
  • Author(s): 八尾香奈子, 本郷智之, 佐竹和久, 渡辺聡, 海老原新, 小林千尋, 興地隆史.
  • Organizer: 第143回日本歯科保存学会学術大会
  • Place of Presentation: 文京シビックホール（東京）
  • Year and Date: 2015-11-13
• [Presentation] Pressure generated outside the apex during root canal irrigation activated by diode laser and Er:YAG laser. (2015)
  • Author(s): Watanabe S, Yao K, Satake K, Hongo T, Ebihara A, Kobayashi C, Okiji T.
  • Organizer: The 17th JSCD/KACD Joint-Scientific Meeting
  • Place of Presentation: Tokyo
  • 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回日本レーザー歯学会
  • Place of Presentation: 北海道自治労会館（札幌）
  • Year and Date: 2015-06-07