In vitro evaluation of smear layer removal of root canals by irradiation with Er:YAG laser after Ni-Ti rotary instrumentation

Alexandre Capelli D.D.S.; Aldo Brugnera Jr.; Fabio Heredia Seixas; Melissa A. Marchesan; Danilo Mathias Zanello Guerisoli; Jesus Djalma Pecora D.D.S.

doi:10.1117/12.476638

3 July 2003 In vitro evaluation of smear layer removal of root canals by irradiation with Er:YAG laser after Ni-Ti rotary instrumentation

Alexandre Capelli D.D.S., Aldo Brugnera Jr., Fabio Heredia Seixas, Melissa A. Marchesan, Danilo Mathias Zanello Guerisoli, Jesus Djalma Pecora D.D.S.

Author Affiliations +

Proceedings Volume 4950, Lasers in Dentistry IX; (2003) https://doi.org/10.1117/12.476638
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

The smear layer removal of root canal walls irradiated with Er:YAG laser after nickel-titanium rotary instrumentation was evaluated by scanning electron microscopy. Thirty mesial roots of human mandibular molars were selected and randomly distributed in three groups, according to treatment. Group 1 was instrumented with rotary nickel-titanium files 1 mm from the anatomical apex and irrigated with 2.5% sodium hypochlorite. Group 2 received the same treatment as Group 1, but after instrumentation the root canals were irradiated with Er:YAG laser. Group 3 received the same treatment as Group 1, but irrigation was performed with 2.5% sodium hypochlorite alternated wtih 17% EDTA during instrumentation. Photomicrographs were obtained from middle and apical thirds and submitted to qualitative evaluation. Statistical analysis showed that 2.5% sodium hypochlorite associated with 17% EDTA (Group 3) removed smear layer more efficiently than 2.5% sodium hypochlorite al one (Group 1) (p<0.05). Root canals irradiated with Er:YAG laser occupied an intermediary position regarding smear layer removal. There were no statistical differences between the evaluated radicular thirds (p>0.05).

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Alexandre Capelli D.D.S., Aldo Brugnera Jr., Fabio Heredia Seixas, Melissa A. Marchesan, Danilo Mathias Zanello Guerisoli, and Jesus Djalma Pecora D.D.S. "In vitro evaluation of smear layer removal of root canals by irradiation with Er:YAG laser after Ni-Ti rotary instrumentation", Proc. SPIE 4950, Lasers in Dentistry IX, (3 July 2003); https://doi.org/10.1117/12.476638

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KEYWORDS

Er:YAG lasers

Sodium

Fiber optics

Scanning electron microscopy

In vitro testing

Statistical analysis

Teeth

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