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Folia Medica

The Journal of Medical University-Plovdiv

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CiteScore 2016: 0.55

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In Vitro Study of Temperature Changes in Pulp Chamber During Root Planing Procedure Using Er:YAG Laser

Blagovesta K. Yaneva
  • Corresponding author
  • Department of Periodontics and Oral Mucosa Diseases, Faculty of Dental Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria
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/ Plamen I. Zagorchev
  • Department of Medical Physics, Biophysics and Mathematics, Faculty of Pharmacy, Medical University of Plovdiv, Plovdiv, Bulgaria
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/ Elena I. Firkova
  • Department of Periodontics and Oral Mucosa Diseases, Faculty of Dental Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria
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/ Ivan T. Glavinkov
  • Department of Periodontics and Oral Mucosa Diseases, Faculty of Dental Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria
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Published Online: 2016-10-17 | DOI: https://doi.org/10.1515/folmed-2016-0022


Aim: To assess temperature changes at specified time intervals during Er:YAG laser scaling and root planing of surfaces with dental calculus.

Materials and methods: Fifteen single-rooted teeth with advanced periodontal disease were extracted and fixed in a cylinder thermostat filled with distilled water at constant temperature (35.5°C). A specially designed thermal probe (type K thermocouple) accurate to ±0.1°C over the range from 20°C to 80°C was fitted into the pulp chamber of tooth sample. Scaling and root planing of the mesial and distal root surfaces was performed using an Er:YAG laser (Lite Touch, Syneron Dental, Israel) with a wavelength of 2940 nm, provided with a chisel tip, and at the following settings: output energy 100 mJ and 50 Hz, duration of irradiation - 40 sec, the tip in contact mode oblique to the root surface at an angle of approximately 10-15 degrees and water spray level 5-6. The temperature inside the pulp chamber was measured every 10 sec.

Results: The temperature in the pulp chamber taken every 10 seconds and compared with the temperature of 35.5°C at baseline decreased by 1.6°C, 2.4°C, 2.5°C, and 2.5°C for the first, second, third and fourth measurement, respectively. These changes did not reach statistical significance.

Conclusion: The Er:YAG laser does not increase the temperature inside the pulp chamber. The assessed changes do not depend on the duration of irradiation which was kept within 40 seconds. Therefore, this treatment modality causes no thermal damage to the pulp under the above defined conditions and can be considered safe.

Keywords: lasers; Er:YAG; dental pulp; temperature; periodontics; root scaling


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About the article

Received: 2016-01-20

Accepted: 2016-06-20

Published Online: 2016-10-17

Published in Print: 2016-09-01

Citation Information: Folia Medica, ISSN (Online) 1314-2143, DOI: https://doi.org/10.1515/folmed-2016-0022.

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© 2016 Folia Medica. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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