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Proceedings Paper

In vitro evaluation of smear layer removal by Er:YAG laser application with five different fiber optic tip withdrawal techniques
Author(s): Aldo Brugnera Jr.; Danilo Mathias Zanello Guerisoli; Melissa A. Marchesan; Julio Cesar Emboava Spano D.D.S.; Jesus Djalma Pecora D.D.S.
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Paper Abstract

This study evaluated smear layer removal in apical and middle root thirds using five different fiberoptic tip withdrawal techniques. Thirty human canines were instrumented using 2.5% sodium hypochlorite, with a final irrigation of distilled water, and divided randomly in 6 different groups. Er:YAG laser was applied in 5 groups with a 50/28 fiberoptic tip (250 mJ input, 112 mJ output, 10 Hz, 1 mm from apex) with distinct withdrawal techniques. Group 6 did not receive laser irradiation. Two pieces of each root canal (middle and apical thirds) were obtained under the SEM and analyzed for the amount of smear layer. Results showed statistical differences (p<0.05) between treatments and significant differences (p<0.01) between radicular thirds. It can be concluded that 1) all withdrawal techniques produced the same results on smear layer removal and 2) the middle third presented less smear layer t han the apical third after Er:YAG laser irradiation.

Paper Details

Date Published: 3 July 2003
PDF: 7 pages
Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); doi: 10.1117/12.476546
Show Author Affiliations
Aldo Brugnera Jr., Univ. de Sao Paulo (Brazil)
Danilo Mathias Zanello Guerisoli, Univ. de Sao Paulo (Brazil)
Melissa A. Marchesan, Univ. de Sao Paulo (Brazil)
Julio Cesar Emboava Spano D.D.S., Univ. de Sao Paulo (Brazil)
Jesus Djalma Pecora D.D.S., Univ. de Sao Paulo (Brazil)

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

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