In vitro evaluation of external root temperature changes during Er:YAG laser application with five different fiber optic tip withdrawal techniques

Jesus Djalma Pecora D.D.S.; Aldo Brugnera Jr.; Melissa A. Marchesan; Danilo Mathias Zanello Guerisoli; Eduardo Luiz Barbin; Fabio Heredia Seixas

doi:10.1117/12.476628

3 July 2003 In vitro evaluation of external root temperature changes during Er:YAG laser application with five different fiberoptic tip withdrawl techniques

Jesus Djalma Pecora D.D.S., Aldo Brugnera Jr., Melissa A. Marchesan, Danilo Mathias Zanello Guerisoli, Eduardo Luiz Barbin, Fabio Heredia Seixas

Author Affiliations +

Proceedings Volume 4950, Lasers in Dentistry IX; (2003) https://doi.org/10.1117/12.476628
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

This study evaluated in vitro the external temperature increase at the three root thirds using five different fiberoptic tip withdrawal techniques in 50 human canines. Er:YAG laser was applied with a 50/28 fiberoptic tip with 250 mJ input, 112 mJ output, 10 Hz, 1 mm from the apical foramen: group 1: each third was irradiated starting at the apex for 1 s on each wall, with the irradiation turned off between thirds; group 2: apical third irradiated without movement for 2 s and tip withdrawn with continuous radiation up to the cervical third; group 3: tip activated at the apex and removed to the canal entrance in a straight line; group 4: tip activated at the apex and removed to the canal entrance with circular movements touching all walls; group 5: tip activated at the apex and removed to the canal entrance with clockwise circular movements for 6 s adn then reinserting and removing with counter-clockwise circular movements for another 6 s, touchgin all walls. Group 1 had significantly lower external temperature (p<0.01). The middle third had the greatest temperature increase (p<0.01). We conclude that the withdrawl techniques caused an increase in external root temperature that would not damage adjacent tissues.

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Jesus Djalma Pecora D.D.S., Aldo Brugnera Jr., Melissa A. Marchesan, Danilo Mathias Zanello Guerisoli, Eduardo Luiz Barbin, and Fabio Heredia Seixas "In vitro evaluation of external root temperature changes during Er:YAG laser application with five different fiberoptic tip withdrawl techniques", Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); https://doi.org/10.1117/12.476628

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