Cervical microleakage in root canals treated with Er:YAG and Nd:YAG laser

Emilio Carlos Sponchiado Jr.; Lidiany Karla Azevedo; Melissa Marchesan; Aldo Brugnera Jr.; Yara T. Silva-Sousa D.D.S.; Edson Alfredo; Manoel D. Sousa Neto

doi:10.1117/12.611285

23 March 2005 Cervical microleakage in root canals treated with Er:YAG and Nd:YAG laser

Emilio Carlos Sponchiado Jr., Lidiany Karla Azevedo, Melissa Marchesan, Aldo Brugnera Jr., Yara T. Silva-Sousa D.D.S., Edson Alfredo, Manoel D. Sousa Neto

Author Affiliations +

Proceedings Volume 5687, Lasers in Dentistry XI; (2005) https://doi.org/10.1117/12.611285
Event: SPIE BiOS, 2005, San Jose, CA, United States

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.

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Emilio Carlos Sponchiado Jr., Lidiany Karla Azevedo, Melissa Marchesan, Aldo Brugnera Jr., Yara T. Silva-Sousa D.D.S., Edson Alfredo, and Manoel D. Sousa Neto "Cervical microleakage in root canals treated with Er:YAG and Nd:YAG laser", Proc. SPIE 5687, Lasers in Dentistry XI, (23 March 2005); https://doi.org/10.1117/12.611285

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