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Proceedings Paper

In vitro evaluation of external root temperature changes during Er:YAG laser application with five different fiber optic tip withdrawal techniques
Author(s): Jesus Djalma Pecora; Aldo Brugnera; Melissa A. Marchesan; Danilo Mathias Zanello Guerisoli; Eduardo Luiz Barbin; Fabio Heredia Seixas
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Paper 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wall, with the irradiation turned off between thirds; group 2: apical third irradiated without movement for 2 s and tip withdrawn with continuous radiation up to the cervical third; group 3: tip activated at the apex and removed to the canal entrance in a straight line; group 4: tip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.

Paper Details

Date Published: 3 July 2003
PDF: 2 pages
Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); doi: 10.1117/12.476628
Show Author Affiliations
Jesus Djalma Pecora, Univ. de Sao Paulo (Brazil)
Aldo Brugnera, Univ. de Sao Paulo (Brazil)
Melissa A. Marchesan, Univ. de Sao Paulo (Brazil)
Danilo Mathias Zanello Guerisoli, Univ. de Sao Paulo (Brazil)
Eduardo Luiz Barbin, Univ. of Sao Paulo (Brazil)
Fabio Heredia Seixas, Univ. de Sao Paulo (Brazil)

Published in SPIE Proceedings Vol. 4950:
Lasers in Dentistry IX
Peter Rechmann; Daniel Fried; Thomas Hennig, Editor(s)

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