SEM evaluation of smear layer removal by Er:YAG laser in root canals

Aldo Brugnera Jr.; Iain M. Roe; Danilo MZ Guerisoli; Joao Vicente B. Barbizam; Jesus Djalma Pecora D.D.S.

doi:10.1117/12.469317

3 June 2002 SEM evaluation of smear layer removal by Er:YAG laser in root canals

Aldo Brugnera Jr., Iain M. Roe, Danilo MZ Guerisoli, Joao Vicente B. Barbizam, Jesus Djalma Pecora D.D.S.

Proceedings Volume 4610, Lasers in Dentistry VIII; (2002) https://doi.org/10.1117/12.469317
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

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.

Citation Download Citation

Aldo Brugnera Jr., Iain M. Roe, Danilo MZ Guerisoli, Joao Vicente B. Barbizam, and Jesus Djalma Pecora D.D.S. "SEM evaluation of smear layer removal by Er:YAG laser in root canals", Proc. SPIE 4610, Lasers in Dentistry VIII, (3 June 2002); https://doi.org/10.1117/12.469317

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