Effects of lasers on chemical composition of anamel and dentin

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dc.contributor.authorZEZELL, DENISEpt_BR
dc.contributor.authorANA, PATRICIApt_BR
dc.contributor.authorALBERO, FELIPEpt_BR
dc.contributor.authorBACHMANN, LUCIANOpt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoANNUAL CONFERENCE OF AMERICAN SOCIETY FOR LASER MEDICINE AND SURGERY, 29thpt_BR
dc.date.accessioned2014-11-19T12:05:27Zpt_BR
dc.date.accessioned2014-11-19T14:07:21Zpt_BR
dc.date.accessioned2015-04-01T13:40:59Z
dc.date.available2014-11-19T12:05:27Zpt_BR
dc.date.available2014-11-19T14:07:21Zpt_BR
dc.date.available2015-04-01T13:40:59Z
dc.date.eventoApril 1-5, 2009pt_BR
dc.description.abstractBackground: Laser irradiation is a promising alternative for caries prevention due to the possibility of changing the microstructure of dental hard tissues. However, the chemical changes promoted by infrared lasers interaction with dental hard tissue are still unclear. This study investigated chemical and erystallographic changes on enamel and dentin after irradiation with Nd:YAG and Fr,Cr:YSGG lasers aiming caries prevention, Study: Thirty enamel and dentin slabs were obtained from bovine teeth, and wore randomly distributted into six groups: G1- unlased enamel; G2- unlased dentin; G3- enamel irradiated with Er,Cr:YSGG laser (o =2.78 ym) at 5.6 J/em? (25 mJ/pulse); Gd- dentin irradiated with Er,Cr:YSGG at 2.8 J/em? (12.5 mJ/ pulse); G5- enamel irradiated with Nd:YAG laser (> = 1.064 ym) at 84.9 J/em? (60 mJ/pulze), and G6- dentin irradiated with Nd:YAG at 84.9 J/em? (60 md/pulse). Sample surfaces were analyzed by micro-Fourier transform infrared spectroscopy (11-FTIR) at 4000-650 cm ' range and with 4 em”* resolution. After p-FTIR, samples were also evaluated by X-ray diffraction at a Synchrotron monochromatic X-ray beam (Cu-Ka, wavelength of 0.0954 nm). Results: Irradiation with Er,CAYSGG laser promoted the decrease on carbonate content of enamel. After Nd:YAG irradiation, it was observed a significant decrease (p < 0.05) of all organic content of enamel, Er,Cr:YSGG and Nd:YAG lasers promoted a significant decrease on the contents of amides 1 and carbonate of dentin. Both laser irradiations also promoted the formation of tricalcium and tetracalcium phosphates, and also a significant increase (p < 0.05) on the crystal growth of the apatite of enamel and dentin. Conclusion: In conclusion, high IR intensity laser irradiation changes mainly the organic and carbonate contents of both enamel and dentin, as well promotes an increase in crystallite sizes and the formation of new crystallographic phases. These changes can be correlated with the mechanism of the improved resistance of these tissues to demineralization observed in our previous studies.
dc.identifier.citationZEZELL, DENISE; ANA, PATRICIA; ALBERO, FELIPE; BACHMANN, LUCIANO. Effects of lasers on chemical composition of anamel and dentin. In: ANNUAL CONFERENCE OF AMERICAN SOCIETY FOR LASER MEDICINE AND SURGERY, 29th, April 1-5, 2009, Washington. <b>Abstract...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/22838.
dc.identifier.orcidhttps://orcid.org/0000-0001-7404-9606
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/22838pt_BR
dc.local.eventoWashingtonpt_BR
dc.rightsopenAccesspt_BR
dc.subjectdentinpt_BR
dc.subjectenamelspt_BR
dc.subjectlaser radiationpt_BR
dc.subjectmorphological changespt_BR
dc.titleEffects of lasers on chemical composition of anamel and dentinpt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorFELIPE GUIMARÃES ALBERO
ipen.autorLUCIANO BACHMANN
ipen.autorPATRICIA APARECIDA DA ANA
ipen.autorDENISE MARIA ZEZELL
ipen.codigoautor5888
ipen.codigoautor2411
ipen.codigoautor3246
ipen.codigoautor693
ipen.contributor.ipenauthorFELIPE GUIMARÃES ALBERO
ipen.contributor.ipenauthorLUCIANO BACHMANN
ipen.contributor.ipenauthorPATRICIA APARECIDA DA ANA
ipen.contributor.ipenauthorDENISE MARIA ZEZELL
ipen.date.recebimento10-03pt_BR
ipen.event.datapadronizada2009pt_BR
ipen.identifier.ipendoc14584pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublicationddb121ad-7cdc-49be-b75c-5dec85d804e5
relation.isAuthorOfPublication05023822-0bca-4883-9459-741a0d6befa3
relation.isAuthorOfPublication32c53ee8-b124-4d72-8872-7532738c9e38
relation.isAuthorOfPublicationa565f8ad-3432-4891-98c0-a587f497db21
relation.isAuthorOfPublication.latestForDiscoverya565f8ad-3432-4891-98c0-a587f497db21
sigepi.autor.atividadeZEZELL, DENISE:693:920:Spt_BR
sigepi.autor.atividadeANA, PATRICIA:3246:920:Npt_BR
sigepi.autor.atividadeALBERO, FELIPE:5888:920:Npt_BR
sigepi.autor.atividadeBACHMANN, LUCIANO:2411:-1:Npt_BR
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