Spectroscopic alterations on enamel and dentin after nanosecond Nd:YAG laser irradiation
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Spectrochimica Acta, A
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Laser irradiation on hard tissue has produced a resistant surface that is likely to prevent caries. In this study, human enamel and dentine were
exposed to nanosecond pulsed Nd:YAG laser with energy densities of 20–40 J/cm2 and pulse width of 6 ns inducing chemical changes in these
tissues. Infrared analysis of human dental enamel and dentine was performed using the KBr method (2 mg sample/300 mg KBr). A correlation
between non-lased and lased spectra was performed that gives an indication of the changes in organic and inorganic compounds after laser–tissue
interaction. Spectra of teeth simultaneously show the inorganic and organic parts of the tissue. The principal bands: amide bands A, I, II, and
III from the collagen-matrix, phosphate from the mineral content, and carbonate bands were identified. The normalized area of peak versus peak
position was determined. Changes of the bands attributed to the collagen matrix were verified after Nd:YAG irradiation. The present results suggest
a chemical modification of organic and mineral compounds by laser. The spectral results indicated an alteration in the absorption bands relative to,
essentially, organic compounds.
Como referenciar
ANTUNES, A.; ROSSI, W. de; ZEZELL, D.M. Spectroscopic alterations on enamel and dentin after nanosecond Nd:YAG laser irradiation. Spectrochimica Acta, A, v. 64, p. 1142-1146, 2006. DOI: 10.1016/j.saa.2005.11.036. Disponível em: http://repositorio.ipen.br/handle/123456789/5416. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.