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Research Article| Volume 22, ISSUE 2, P81-84, February 1996

Pressure waves in root canals induced by Nd:YAG laser

  • Author Footnotes
    1 Dr. Levy is affiliated with the Laser Hard Tissue Institute, San Clemente, CA.
    Guy Levy
    Footnotes
    1 Dr. Levy is affiliated with the Laser Hard Tissue Institute, San Clemente, CA.
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  • Author Footnotes
    2 Ms. Rizoiu and Mr. Lam are affiliated with Biolase Technology, Inc., San Clemente, CA.
    Ioana Rizoiu
    Footnotes
    2 Ms. Rizoiu and Mr. Lam are affiliated with Biolase Technology, Inc., San Clemente, CA.
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  • Author Footnotes
    3 Dr. Friedman is affiliated with the Department of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
    Shimon Friedman
    Correspondence
    Address requests for reprints to Dr. Shimon Friedman, Department of Endodontics, Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ontario M5G 1G6, Canada.
    Footnotes
    3 Dr. Friedman is affiliated with the Department of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
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  • Author Footnotes
    2 Ms. Rizoiu and Mr. Lam are affiliated with Biolase Technology, Inc., San Clemente, CA.
    Hoan Lam
    Footnotes
    2 Ms. Rizoiu and Mr. Lam are affiliated with Biolase Technology, Inc., San Clemente, CA.
    Search for articles by this author
  • Author Footnotes
    1 Dr. Levy is affiliated with the Laser Hard Tissue Institute, San Clemente, CA.
    2 Ms. Rizoiu and Mr. Lam are affiliated with Biolase Technology, Inc., San Clemente, CA.
    3 Dr. Friedman is affiliated with the Department of Endodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
DOI:https://doi.org/10.1016/S0099-2399(96)80278-0
Pressure waves in root canals induced by Nd:YAG laser
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      Recently, root canal preparation using Nd:YAG laser has been introduced. Laser interaction with matter may generate cavitation and subsequent pressure waves. This study characterized the pressure waves induced in root canals by either Nd:YAG laser, sonically vibrated files, or ultrasonically vibrated files. The root canals of 14 single-rooted teeth were prepared conventionally and filled with water. In 12 teeth, a pulsed Nd:YAG laser was activated in the canal using optical fibers of various diameters and various power settings. In the remaining two teeth, either a sonic or ultrasonic file was activated. The pressure waves induced in the canals were detected by a piezoelectric transducer. The results were analyzed using correlation coefficient and coefficient of variation. Laser irradiation resulted in pressure waves with amplitudes varying from 35.78 to 79.26 mV, being positively correlated with the laser power density (R2 = 0.870). Sonic and ultrasonic vibrations resulted in pressure waves with mean amplitudes of 60.51 mV and 7.02 mV, respectively. It was concluded that Nd:YAG laser irradiation induced pressure waves, with different characteristics from waves induced by freely vibrating sonic and ultrasonic endodontic instruments when applied to water-filled root canals.
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      Article info

      Identification

      DOI: https://doi.org/10.1016/S0099-2399(96)80278-0

      Copyright

      © 1996 The American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

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