Er:YAG laser effects on enamel occlusal fissures: an in vitro study

Journal of Clinical Laser Medicine & Surgery
Juliana R MatsonCarlos de P Eduardo

Abstract

This study evaluated by scanning electron microscopy (SEM) the morphological changes in occlusal fissure enamel, of permanent models, irradiated by Er:YAG laser using contact and noncontact fiberoptics in vitro. Previous studies have demonstrated the efficacy of Er:YAG laser for dental hard tissue removal and cavity preparation. The treatment of occlusal fissures in noncarious permanent human molars (n = 9) was carried out with Er:YAG laser (KEY Laser II) using handpiece no. 2051, noncontact, focused (12 mm), water spray-cooled, pulse energy 200 mJ, and frequency 2 Hz (group 1), and handpiece no. 2055 with a quartz fiberoptic 50/10, in contact, air cooled, pulse energy setting of 350 mJ and frequency 2 Hz (group 2) and 400 mJ/2 Hz (group 3). The specimens were sectioned, dehydrated in a graded series of aqueous ethanol, dried, and sputtering with gold. Morphological change analysis on occlusal fissures was performed by SEM. Group 1 showed removal of fissure debris and predominantly enamel etching-like patterns, and groups 2 and 3 showed irregular edges, melting, and recrystallization of fissure enamel, with a lava-like structure and bubble-like voids. The results of this in vitro study suggest that the irradiation of fissures b...Continue Reading

References

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Citations

Apr 9, 2011·European Archives of Paediatric Dentistry : Official Journal of the European Academy of Paediatric Dentistry·G Olivi, M D Genovese
Oct 7, 2009·Photomedicine and Laser Surgery·Laura Emma Rodríguez-VilchisEnrique Cuauhtémoc Samano
Feb 11, 2011·Photomedicine and Laser Surgery·Hande Sar SancakliEsra Yildiz
Mar 23, 2011·Photomedicine and Laser Surgery·Laura Emma Rodríguez-VilchisClaudia Centeno-Pedraza
Jan 23, 2013·Photomedicine and Laser Surgery·Alessandra M Correa-AfonsoRegina G Palma-Dibb
Aug 19, 2006·Dental Materials Journal·Atsushi MineTakuo Kuboki
Dec 10, 2002·Journal of Clinical Laser Medicine & Surgery
Sep 13, 2005·Journal of Dentistry·Daniela Thomazatti Chimello-SousaSilmara Aparecida Milori Corona
Mar 25, 2014·Microscopy Research and Technique·Jennifer Manuela Díaz-MonroyIgnacio Sanchez-Flores
Jun 20, 2007·Microscopy Research and Technique·Patricia Moreira FreitasCarlos de Paula Eduardo
Aug 3, 2011·Microscopy Research and Technique·Alessandra M Correa-AfonsoRegina G Palma-Dibb

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