The effects of Er:YAG laser on root canal irrigation

DOI 17 References
  • Himeka MATSUMOTO
    Department of Endodontology, Kyushu University Hospital
  • Yoshito YOSHIMINE
    Department of Endodontology and Operative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University
  • Hiromi SATO
    Department of Endodontology and Operative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University
  • Yuki ARAI
    Department of Endodontology and Operative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University Nozomi Dental Office
  • Ryoko ISOBE
    Department of Endodontology, Kyushu University Hospital Murai Dental Clinic
  • Kan USHIJIMA
    Ushijima Dental Clinic
  • Masaharu NISHIHARA
    Nishihara Dental Clinic
  • Akifumi AKAMINE
    Department of Endodontology and Operative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University

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Other Title
  • Er:YAGレーザーを用いた根管洗浄作用に関する研究
  • —模擬根管における側枝内清掃効果—
  • —Cleaning of accessory canals in simulated root canals—

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<p>Abstract : The aim of this study was to evaluate the efficiency of laser-activated irrigation (LAI) in cleaning accessory root canals. Simulated root canal models with accessory canals were used. Accessory canals of 0.5 mm diameter were located at 1, 3, 5, 10 mm from the apex. Accessory canals were filled with the flowable radiolucent material, CalcipexⅡ®. Root canals were irrigated with Er:YAG laser-activated irrigation (LAI) or syringe irrigation. Three groups (n=4) were evaluated as follows : Group 1 : LAI with a cone-shaped tip for 20 s at 30 mJ and 20 pps, stationary method ; Group 2 : LAI with a cone-shaped tip at 30 mJ and 20 pps, pull-up method (1 mm/s) ; Group 3 : syringe irrigation with 3 mL water. Digital X-ray photographs using microtomography were analyzed for the quantity of radiolucent material remaining after irrigation. Overall comparison (average of the material-removed area from all four accessory canals) between irrigation methods was performed using the Tukey-Kramer test. Differences between the four accessory canals after each irrigation method were also investigated. Statistically significant differences (p<0.01) were found between the LAI and syringe irrigation groups. LAI was more effective in cleaning the accessory root canals than syringe irrigation. The effect of LAI in the upper accessory canal was lower than that in the other accessory canals. Especially, the stationary method showed this tendency more remarkably than the pull-up method. These results suggest that LAI irrigation using Er:YAG laser equipped with a cone-shaped tip may be promising in cleaning accessory root canals.</p>

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