Influence of Er:YAG laser frequency on dentin caries removal capacity

Microscopy Research and Technique
Walter Raucci-NetoRegina Guenka Palma-Dibb

Abstract

The purposes of this study were to evaluate in vitro the influence of different frequencies of Er:YAG laser on the human dentin caries removal capacity. Thirty fragments obtained from third molars were randomly assigned into three groups (n = 10) according to the laser frequency used: 4, 6, and 10 Hz. The caries lesion (±1 mm deep) was induced before the irradiation by S.mutans cultures for 6 weeks. The specimens of all groups were irradiated with 200 mJ of energy in noncontact and focused mode under constant refrigeration (water flow: 2.5 mL/min). Quantitative analysis of the caries removal was performed by DIAGNOdent™ and the Axion Vision™ software. Qualitative analysis was performed by Scanning electron microscope (SEM) and light microscope (LM). Data were analyzed by ANOVA and Fishers' tests. The DIAGNOdent™ revealed that the caries removal was similar with 4 and 6 Hz and was superior with 10 Hz (P < 0.05). The analysis with Axion Vision™ software revealed that the caries removal was similar with 6 and 10 Hz and the 4 Hz group promoted the lowest caries removal. Through SEM morphologic analysis, some specimens irradiated with 4 Hz presented, under the demineralized dentin, a disorganized collagenous matrix. The LM images re...Continue Reading

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Sep 7, 2007·Photomedicine and Laser Surgery·Walter Raucci-NetoRegina G Palma-Dibb
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May 20, 2008·Photomedicine and Laser Surgery·Alessandra M Correa-AfonsoRegina G Palma-Dibb
Nov 26, 2008·Photomedicine and Laser Surgery·Keigo OsukaYoshito Hirai
Dec 23, 2008·Photomedicine and Laser Surgery·Walter Raucci-NetoRegina Guenka Palma-Dibb

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Citations

Jan 3, 2015·Photomedicine and Laser Surgery·Mary A S MeloLidiany K A Rodrigues
Apr 24, 2014·Lasers in Medical Science·Walter Raucci-NetoRegina Guenka Palma-Dibb
Dec 19, 2016·The Open Dentistry Journal·Amin DavoudiHamid Badrian
Jan 6, 2017·Lasers in Medical Science·Michelle Alexandra ChinelattiSilmara Aparecida Milori Corona
Nov 24, 2012·Microscopy Research and Technique·Carmen Victoria Torres ToroRegina Guenka Palma-Dibb
Jun 1, 2012·Microscopy Research and Technique·Walter Raucci-NetoRegina Guenka Palma-Dibb

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