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Effects of Er:YAG and Er,Cr:YSGG lasers on dentine hypersensitivity. Short-term clinical evaluation

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Abstract

Dentine hypersensitivity (DH) is a painful condition and is a clinical challenge due to the different treatment strategies available. High-intensity lasers have been studied as a possible option. The aim of this randomized, controlled, double-blind clinical study was to evaluate the effects of Er:YAG and Er,Cr:YSGG lasers on DH. The study group comprised 28 subjects who met the inclusion criteria. A visual analogue scale was used to quantify sensitivity before treatment as baseline, immediately before and immediately after treatment, and 1 week and 1 month after treatment. Teeth were assigned to four groups: group 1 control (no treatment), group 2 Er:YAG laser treatment (2 Hz/32.4 mJ/5.9 J/cm2), group 3 Er,Cr:YSGG laser treatment (0.25 W/4.4 J/cm2), and group 4 Er,Cr:YSGG laser treatment (0.50 W/ 8.9 J/cm2). Data were collected and submitted to statistical analysis for both evaporative (air) and mechanical (probe) stimulation. For both the air and probe stimulation no differences were observed between the pretreatment sensitivities. With the evaporative stimulus, the pain level immediately after treatment was reduced; however, after this the values remained stable. Irradiation with the Er:YAG laser was associated with the lowest level of pain. With the mechanical stimulus, group 4 showed the most pronounced decrease in pain immediately after treatment; however, by the end of the study, pain levels had increased. Groups 1, 2 and 3 showed a reduction in pain that was significantly different from that in group 4 after the 4 weeks of clinical follow up. Based on the results and within the limits of this study, it can be concluded that none of the laser treatments studied was capable of completely eliminating pain, but the Er:YAG and Er,Cr:YSGG lasers are suitable for the treatment of DH.

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Acknowledgments

This investigation was supported by the State of Sao Paulo Research Foundation (grant 03/10001-0) and the Special Laboratory of Lasers in Dentistry at the University of São Paulo, Brazil.

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Authors and Affiliations

  1. Department of Restorative Dentistry/Special Laboratory of Lasers in Dentistry (LELO), School of Dentistry, University of São Paulo, São Paulo, SP, Brazil

    Ana Cecilia Corrêa Aranha & Carlos de Paula Eduardo

  2. Cidade Universitária, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, Brazil, 05508-900

    Ana Cecilia Corrêa Aranha & Carlos de Paula Eduardo

Authors
  1. Ana Cecilia Corrêa Aranha
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  2. Carlos de Paula Eduardo
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Correspondence to Ana Cecilia Corrêa Aranha.

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Aranha, A.C.C., de Paula Eduardo, C. Effects of Er:YAG and Er,Cr:YSGG lasers on dentine hypersensitivity. Short-term clinical evaluation. Lasers Med Sci 27, 813–818 (2012). https://doi.org/10.1007/s10103-011-0988-9

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  • DOI: https://doi.org/10.1007/s10103-011-0988-9

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