Please use this identifier to cite or link to this item: http://repositorio.unitau.br/jspui/handle/20.500.11874/2504
metadata.dc.type: Artigo de Periódico
Title: In vitro study of the Nd:YAG laser effect on human dental enamel: Optical and scanning electron microscope analysis
Authors: Pelino, José Eduardo Pelizon
Mello, Júlio Brugnara
Eduardo, Carlos de Paula
Jorge, Antonio Olavo Cardoso
Abstract: Objective: The Nd:YAG laser irradiation of dental enamel was evaluated in enamel demineralization experiments in a Streptococcus mutans culture media. Summary Background Data: Previous studies had shown that a continuous wave Nd:YAG laser at an energy of approximately 67 mJ may induce an increased acid resistance in human dental enamel when exposed to severe demineralization conditions. Methods: Enamel windows of 3 x 4 cm in the buccal surface were irradiated with a continuous wave Nd:YAG laser at a wavelength of 1,064 μm using energy densities of from 83.75 to 187.50 J/cm2. Enamel windows of 3 x 4 cm on the lingual surface served as control (without the laser irradiation). The enamel windows were then exposed to a Streptococcus mutans culture media at a temperature of 37°C for 15 and 21 days. The laser effects and demineralization were examined both by optical microscopy and scanning electron microscopy (SEM). Results: A comparison between the lased and the unlased windows of enamel showed fusion and recrystalization of the enamel and increased acid-resistance in all groups irradiated with the Nd:YAG laser. On the other hand, the 3 x 4 delimited enamel surfaces from the control group (not irradiated with the Nd:YAG laser) showed 100% demineralization. Conclusions: These findings are consistent with the finding that laser irradiation of dental results in significant reduction of the effective solubility of enamel mineral.Objective: The Nd:YAG laser irradiation of dental enamel was evaluated in enamel demineralization experiments in a Streptococcus mutans culture media. Summary Background Data: Previous studies had shown that a continuous wave Nd:YAG laser at an energy of approximately 67 mJ may induce an increased acid resistance in human dental enamel when exposed to severe demineralization conditions. Methods: Enamel windows of 3×4 cm in the buccal surface were irradiated with a continuous wave Nd:YAG laser at a wavelength of 1,064 μm using energy densities of from 83.75 to 187.50 J/cm2. Enamel windows of 3×4 cm on the lingual surface served as control (without the laser irradiation). The enamel windows were then exposed to a Streptococcus mutans culture media at a temperature of 37 °C for 15 and 21 days. The laser effects and demineralization were examined both by optical microscopy and scanning electron microscopy (SEM). Results: A comparison between the lased and the unlased windows of enamel showed fusion and recrystalization of the enamel and increased acid-resistance in all groups irradiated with the Nd:YAG laser. On the other hand, the 3×4 delimited enamel surfaces from the control group (not irradiated with the Nd:YAG laser) showed 100% demineralization. Conclusions: These findings are consistent with the finding that laser irradiation of dental results in significant reduction of the effective solubility of enamel mineral.
metadata.dc.language: Inglês
Publisher: Mary Ann Liebert Inc. Publishers, Larchmont, NY, United States
metadata.dc.rights: Acesso Restrito
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032876729&partnerID=40&md5=fa71b83a303fc876b2568c9f6f388fb5
http://repositorio.unitau.br/jspui/handle/20.500.11874/2504
Issue Date: 1999
Appears in Collections:Artigos de Periódicos

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.