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Proceedings Paper

SEM evaluation of smear layer removal by Er:YAG laser in root canals
Author(s): Aldo Brugnera; Iain M. Roe; Danilo MZ Guerisoli; Joao Vicente B. Barbizam; Jesus Djalma Pecora
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Paper Abstract

The effects of two endodontic irrigants associated or not with Er:YAG laser on a smear layer created by hand instrumentation were evaluated in vitro in the middle and apical thirds of root canals. Twenty five human maxillary canines with a single root were distributed randomly into five groups of five teeth each. Group 1 was irrigated with sodium hypochlorite 1.0%, Group 2 received EDTAC 15% as irrigating solution and Group 3 received both NaClO 1.0% and EDTAC 15%. Group 4 was irrigated with distilled water and irradiated with Er:YAG laser. Group 5 received NaClO 1.0% as irrigating solution and was irradiated with Er:YAG laser. Teeth were split longitudinally and prepared for examination under scanning electron microscopy. The teeth irrigated with NaClO (Group 1) showed the higher amount of smear layer, with statistically significant differences (p<0.05) from the teeth irrigated with distilled water and irradiated with Er:YAG laser (Group 4), which showed intermediate amounts of smear layer. The teeth irrigated with EDTAC 15%, NaClO 1.0% associated with EDTAC 15% and NaClO 1.0% with Er:YAG laser (Groups 2,3 and 5) showed the lowest amounts of smear layer, being statistically similar between them and different (p<0.05) from Groups 1 and 4. There were no differences between the radicular thirds. It can be concluded that irradiation with Er:YAG laser can be as effective as EDTAC 15% when used associated with 1.0% sodium hypochlorite, but not as effective when used together with distilled water.

Paper Details

Date Published: 3 June 2002
PDF: 6 pages
Proc. SPIE 4610, Lasers in Dentistry VIII, (3 June 2002); doi: 10.1117/12.469317
Show Author Affiliations
Aldo Brugnera, Univ. de Sao Paulo (Brazil)
Iain M. Roe, Univ. of Birmingham (United Kingdom)
Danilo MZ Guerisoli, Univ. de Sao Paulo (Brazil)
Joao Vicente B. Barbizam, Univ. of Sao Paulo (Brazil)
Jesus Djalma Pecora, Univ. de Sao Paulo (Brazil)


Published in SPIE Proceedings Vol. 4610:
Lasers in Dentistry VIII
Peter Rechmann; Daniel Fried; Thomas Hennig, Editor(s)

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