Construction of the carious detecter system using the laser

• Project/Area Number: 15K11139
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Conservative dentistry
• Research Institution: Osaka Dental University
• Principal Investigator: YOSHIKAWA Kazushi 大阪歯科大学, 歯学部, 准教授 (30309182)
• Co-Investigator(Kenkyū-buntansha): 粟津 邦男 大阪大学, 工学研究科, 教授 (30324817) ; 間 久直 大阪大学, 工学研究科, 准教授 (70437375)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 齲蝕 / 選択的除去 / レーザー

Outline of Final Research Achievements

The choice of the probe is important about the trial manufacture of the carious identification device. It is demanded visible light penetrating the probe of the carious identification device and that we can insert it in oral cavity. We used a tip (P400T, J.Morita) for radiation of the Er:YAG laser for dental treatment as a probe this time.
It was incident on a probe by light output by He-Ne laser and measured strength of appearance shone light by a power meter (PM20, so laboratory) from the tip. After measured optical power when we applied black paint to the probe tip, we made the probe tip touch simulated preparation, and the paint of the probe tip made it exfoliate partly. As a result of measured strength of the light again, optical power significantly improved as compared with before contact with the preparation. We measured hardness of the preparation by measuring optical power, and this results suggested that they could distinguish carious.

Research Products

• [Journal Article] Selective Removal of Dental Caries Using Er: YAG Laser with Experimental Caries-detecting Dye Solution Containing High Laser-absorptive Substances (2016)
  • Author(s): 吉川 一志, 保尾 謙三, 森川 裕仁, 井村 和希, 古澤 一範, 三浦 樹, 平井 千香子, 小正 玲子, 谷本 啓彰, 岩田 有弘, 粟津 邦男, 山本 一世
  • Journal Title: The Japanese Journal of Conservative Dentistry Volume: 59 Issue: 3 Pages: 259-265
  • DOI: 10.11471/shikahozon.59.259
  • NAID: 130005162215
  • ISSN: 0387-2343, 2188-0808
  • Peer Reviewed / Open Access
• [Journal Article] Comparison of Ablation Characteristics of Bovine Demineralized Dentin Using Nanosecond Pulsed Lasers at the Wavelengths of 2.94 and 5.80μm for Selective Removal of Caries (2016)
  • Author(s): 間久直, 清水公太, 石井克典, 吉川一志, 保尾謙三, 山本一世, 粟津邦男
  • Journal Title: Journal of Japanese Society for Laser Dentistry Volume: 27 Issue: 2 Pages: 51-55
  • DOI: 10.5984/jjpnsoclaserdent.27.51
  • NAID: 130005249172
  • ISSN: 0917-7450, 2185-6702
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Er:YAGレーザー照射歯質に対するレジン添加型GIC修復の辺縁封鎖性について (2016)
  • Author(s): 保尾 謙三, 黄地 智子, 恩田 康平, 宮地 秀彦, 岩田 有弘, 吉川 一志, 山本 一世
  • Organizer: 第35回日本接着歯学会学術大会
  • Place of Presentation: 北海道大学 札幌キャンパス 学術交流会館（北海道・札幌市）
  • Year and Date: 2016-12-03
• [Presentation] エナメル質の微細亀裂に対する各種知覚過敏抑制材の封鎖性 (2016)
  • Author(s): 古澤 一範, 保尾 謙三, 吉川 一志, 山本 一世
  • Organizer: 日本歯科保存学会2016年度秋季学術大会（第145回）
  • Place of Presentation: キッセイ文化ホール(長野県・松本市)
  • Year and Date: 2016-10-27
• [Presentation] 各種知覚過敏抑制材が漂白効果に及ぼす影響について (2016)
  • Author(s): 吉川 一志, 宮地 秀彦, 岩田 有弘, 恩田 康平, 竹内 摂, 山本 一世
  • Organizer: 日本歯科審美学会 第27回学術大会
  • Place of Presentation: 京王プラザホテル札幌(北海道・札幌市）
  • Year and Date: 2016-08-27