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Proceedings Paper

Cervical microleakage in root canals treated with Er:YAG and Nd:YAG laser
Author(s): Emilio Carlos Sponchiado; Lidiany Karla Azevedo; Melissa Marchesan; Aldo Brugnera; Yara T. Silva-Sousa; Edson Alfredo; Manoel D. Sousa Neto
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Paper Abstract

Cervical microleakage was evaluated in sealed root canals previously treated with Er:YAG and Nd:YAG lasers. Ninety-two single-rooted maxillary human canines were prepared with the crown-down technique and irrigated with distilled and deionized water. The samples were distributed randomly into 9 groups of 10 teeth each. One tooth was used as a positive control and one as a negative control. In group I, 1.2 ml of EDTAC was applied during 5 min. In groups II to V, radicular dentine was irradiated with Er:YAG laser (Opus 20, Opus Dent, Israel) at the following parameters: 200 mJ and 8 Hz, 200 mJ and 16 Hz, 400 mJ and 8 Hz, or 400 mJ and 16Hz, respectively, for 60 s. In groups VI to IX, radicular dentine was irradiated with Nd:YAG laser (Fotona Medical Lasers, Slovenia) at 10 Hz and 1 W, 10 Hz and 2 W, 15 Hz and 1 W, or 15 Hz and 2 W, respectively, for 60 s. The canals were then sealed by the lateral condensation technique with an epoxy resin-based sealer. The roots were immersed in India ink for 15 days and then cleared to visualize the level of cervical microleakage with a measurement microscope. The results were evaluated by the Kruskal-Wallis test, which showed no statistical significance (p>0.01) for parameter variations of the Er:YAG laser when compared to the control group. However, the increase in frequency and potency for Nd:YAG laser decreased the microleakage when compared to the control group.

Paper Details

Date Published: 23 March 2005
PDF: 4 pages
Proc. SPIE 5687, Lasers in Dentistry XI, (23 March 2005); doi: 10.1117/12.611285
Show Author Affiliations
Emilio Carlos Sponchiado, Univ. de Ribeirao Preto (Brazil)
Lidiany Karla Azevedo, Univ. de Ribeirao Preto (Brazil)
Melissa Marchesan, Univ. de Ribeirao Preto (Brazil)
Aldo Brugnera, Univ. do Vale do Paraiba (Brazil)
Yara T. Silva-Sousa, Univ. de Ribeirao Preto (Brazil)
Edson Alfredo, Univ. de Ribeirao Preto (Brazil)
Manoel D. Sousa Neto, Univ. de Ribeirao Preto (Brazil)


Published in SPIE Proceedings Vol. 5687:
Lasers in Dentistry XI
Peter Rechmann; Daniel Fried, Editor(s)

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