Er:YAG and Nd:YAG laser irradiation effect on dental root cut: a SEM analysis

Guilherme Paulo S. Mello; Thais Cachute Paradella; Egberto Munin; Jose Benedicto Mello; Marcos T. T. Pacheco; Sizenando Porto Neto

doi:10.1117/12.409312

16 November 2000 Er:YAG and Nd:YAG laser irradiation effect on dental root cut: a SEM analysis

Guilherme Paulo S. Mello, Thais Cachute Paradella, Egberto Munin, Jose Benedicto Mello, Marcos T. T. Pacheco, Sizenando Porto Neto

Author Affiliations +

Proceedings Volume 4161, Optical Biopsy and Tissue Optics; (2000) https://doi.org/10.1117/12.409312
Event: EOS/SPIE European Biomedical Optics Week, 2000, Amsterdam, Netherlands

Abstract

The root end cut, also called apicoectomy, consists on the surgical removal of the root's end, as one of the last alternatives for teeth preservation. This procedure may be done with conventional diamond burs, as well as Er:YAG laser only, or in association with Nd:YAG laser. In this paper, the quality of the root end cut for the different mentioned procedures, was compared for a better analysis of these techniques, regarding surface finishing. The Er:YAG laser dosimetry applied during the experiment was of 400 mJ/10 Hz, using a laser beam with a 0.8 mm diameter. The Nd:YAG laser was irradiated at 1.5 W/10 Hz, being the samples submitted to a scanning electron microscope. On the Er:YAG laser irradiated samples, there was absence of smear layer, as well as the presence of some open dentinal tubules, presenting the surface a smooth texture. On the roots cut with the Er:YAG laser, in association with the Nd:YAG laser, below the ablative regime, there was the presence of a melted dentin surface, with an appearance which suggests a non-crystalline structure, closing the tubules. Regarding the conventional apicoectomy, the samples presented a plain surface, with the dentinal tubules being closed by the smear layer.

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Guilherme Paulo S. Mello, Thais Cachute Paradella, Egberto Munin, Jose Benedicto Mello, Marcos T. T. Pacheco, and Sizenando Porto Neto "Er:YAG and Nd:YAG laser irradiation effect on dental root cut: a SEM analysis", Proc. SPIE 4161, Optical Biopsy and Tissue Optics, (16 November 2000); https://doi.org/10.1117/12.409312

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