Application of Laser to Next Endodontics Prevented From Cracking

激光在牙髓治疗中的应用防止开裂

• 批准号: 22791828
• 负责人: WATANABE Satoshi
• 金额: $ 2.5万
• 依托单位: Tokyo Medical and Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22791828/
• 关键词: 歯内療法学; 象牙質の歪; Er:YAG レーザー; マイクロクラック; 逆根管窩洞形成; 超音波; マイクロCT; ストレインゲージ; 破折試験; Er : YAGレーザー; Er:YAGレーザー

The purpose of this study was to investigate the kinetics of root fractures produced byroot-end cavity preparation and the fracture resistance following root-end cavitypreparation using Er:YAG laser and ultrasonics. Roots of extracted human anteriorteeth were prepared, laterally condensed with guttapercha, and the root-end wasresected. Root-end cavities of 3 mm in depth were prepared using Er:YAG laser withwater cooling , an ultrasonic device at the highest power setting with or without watercooling, or at the lowest power setting with water cooling. After the preparation,presence or absence of fracture and morphological change were observed with amicroscope and a micro CT. Then, obturation materials in the root canal werevertically loaded using a universal testing machine. There were significantly morefractures in the ultrasonic group at the highest power setting group compared to theEr:YAG laser group and the ultrasonic group at the lowest power setting with watercooling. Within the limitations of thisin vitro experiment, fractures caused by Er:YAGlaser irradiation under water cooling for root-end cavity preparation was minimal.However, there were no significant differences in the resistance and vertical rootfracture patterns between the Er:YAG laser group and the ultrasonic group.

本研究的目的是探讨Er：YAG激光和超声根端洞制备后牙根断裂的动力学和根端洞制备后的抗断裂性。取离体前牙根，用牙胶侧向加压，切去根尖。采用Er：YAG激光器、水冷超声装置、最高功率超声装置和最低功率超声装置分别在根端制备了3 mm深的空腔。制备后，用显微镜和微型CT观察有无骨折和形态学变化。然后在万能试验机上对根管内充填材料进行反向加载。最高功率超声组与Er：YAG激光组和最低功率水冷超声组相比，有显著性差异。在本实验条件下，Er：YAG激光水冷却预备根端窝洞引起的牙根折裂是最小的，而Er：YAG激光组和超声组的牙根折裂形态和阻力无显著性差异。

项目成果

Shaping of the Root Canal Using Er:YAG Laser Irradiation

• DOI: 10.1089/pho.2012.3226
• 发表时间: 2012-07-01
• 期刊: PHOTOMEDICINE AND LASER SURGERY
• 作者: Kokuzawa, Chizuko;Ebihara, Arata;Suda, Hideaki
• 通讯作者: Suda, Hideaki

In vitro Detection of Bone Cavity in the Porcine Mandible by Optical Coherence Tomography

光学相干断层扫描体外检测猪下颌骨骨腔

• 发表时间: 2013
• 作者: Ding J;Anjo T;Watanabe S;Iino Y;Kokuzawa C;Ebihara A;Suda H
• 通讯作者: Suda H

よくわかる外傷歯-症例から学ぶ治療のエッセンス-有髄歯の歯根破折

外伤牙浅显易懂 - 从案例中汲取治疗精髓 - 牙髓牙根折

• 发表时间: 2010
• 作者: Gombo Bolortuya;海老原新;川島伸之;渡辺聡;安生智郎;三枝英敏;石澤千鶴子;須田英明;渡辺聡
• 通讯作者: 渡辺聡

Low-energy Erbium : YAG irradiation stimulates cell mineralization

低能铒：YAG 照射刺激细胞矿化

• 发表时间: 2010
• 作者: Combo Bolortuya;海老原新、川島伸之、渡辺聡、安生智郎、三枝英敏、石澤千鶴子、須田英明
• 通讯作者: 海老原新、川島伸之、渡辺聡、安生智郎、三枝英敏、石澤千鶴子、須田英明

Analysis of osteoblastic mesenchymal cell adhesion on laser-induced dentin modification

激光诱导牙本质修饰的成骨间充质细胞粘附分析

• 发表时间: 2010
• 作者: Gombo B;Ebihara A;Watanabe S;Anjo T;Kokuzawa C;Saegusa H;Kawashima N;Suda H
• 通讯作者: Suda H