Temperature changes on the root surfaces of mandibular incisors after an 810-nm high-intensity intracanal diode laser irradiation

da Fonseca Alvarez, Andrea; Moura-Netto, Cacio; Daliberto Frugoli, Alexandre; Fernando, Casemiro; Correa Aranha, Ana Cecilia; Davidowicz, Harry

doi:doi:10.1117/1.JBO.17.1.015006

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Journal of Biomedical Optics / Volume 17 / Issue 1 / Research Papers: General

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Temperature changes on the root surfaces of mandibular incisors after an 810-nm high-intensity intracanal diode laser irradiation

J. Biomed. Opt. 17, 015006 (Feb 07, 2012); http://dx.doi.org/10.1117/1.JBO.17.1.015006

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Abstract

References (17)

Andrea da Fonseca Alvarez and Harry Davidowicz

Universidade Paulista, Department of Endodontics, São Paulo, SP 04043-200, Brazil

Cacio Moura-Netto

University of São Paulo, Department of Restorative Dentistry, Endodontics Division, 2227 São Paulo, SP 05508-000, Brazil

Alexandre Daliberto Frugoli and Casemiro Fernando

Universidade Paulista, Department of Engineering, São Paulo, SP 04043-200, Brazil

Ana Cecilia Correa Aranha

Special Laboratory of Lasers in Dentistry (LELO-FOUSP), Department of Restorative Dentistry, São Paulo, SP 05508-000, Brazil

Temperature changes caused by laser irradiation can promote damage to the surrounding dental tissues. In this study, we evaluated the temperature changes of recently extracted human mandibular incisors during intracanal irradiation with an 810-nm diode laser at different settings. Fifty mandibular incisors were enlarged up to an apical size of ISO No. 40 file. After the final rinse with 17% ethylenediaminetetraacetic acid, 0.2% lauryl sodium sulfate biologic detergent, and sterile water, samples were irradiated with circular movements from apex to crown through five different settings of output power (1.5, 2.0, 2.5, 3.0, and 3.5 W) in continuous mode. The temperature changes were measured on both sides of the apical and middle root thirds using two thermopar devices. A temperature increase of 7 °C was considered acceptable as a safe threshold when applying the diode laser. Results: The results showed that only 3.5-W output power increased the outer surface temperature above the critical value. Conclusion: The recommended output power can be stipulated as equal to or less than 3 W to avoid overheating during diode laser irradiation on thin dentin walls.

History

Received Oct 03, 2011
Accepted Dec 02, 2011
Revised Dec 02, 2011
Published online Feb 07, 2012

Digital Object Identifier

http://dx.doi.org/10.1117/1.JBO.17.1.015006

Citation

Andrea da Fonseca Alvarez, Cacio Moura-Netto, Alexandre Daliberto Frugoli, Casemiro Fernando, Ana Cecilia Correa Aranha and Harry Davidowicz, "Temperature changes on the root surfaces of mandibular incisors after an 810-nm high-intensity intracanal diode laser irradiation", J. Biomed. Opt. 17, 015006 (Feb 07, 2012); http://dx.doi.org/10.1117/1.JBO.17.1.015006