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Лазерно-индуцированная флюоресценция твердых тканей зуба

Лазерно-индуцированная флюоресценция твердых тканей зуба

Abstract

Fluorescence spectra of enamel, dentin-enamel junction (DEJ), and dentin as well as various anatomic-morphological regions of intact teeth were obtained under excitation with the laser sources of 405, 445 and 532 nm wavelengths. It was observed that DEJ was characterized by the highest intensity of fluorescence while dental enamel demonstrated the least intensity; at the same time spectra shapes are very similar for all of the applied excitation sources. This makes it possible to make an assumption that the luminescence spectra in the enamel, dentin and DEJ are of the common nature. One can observe the shift of fluorescence peak towards long-wave range with the increase of the excitation wavelength. Intensity of fluorescence was shown to be considerably dependent on the area of the study. We made an assumption that fluorescence of the hard dental tissues is contributed by several endogenous phosphors, first of all, by structural agents of collagen and amelogenin, and also by non-stoichiometric crystals of hydroxyapatite.

Получены спектры флюоресценции эмали, дентино-эмалевой границы (ДЭГ), дентина, а также различных анатомоморфологических областей интактных зубов при возбуждении лазерными источниками с длинами волн 405, 445 и 531 нм. Обнаружено, что наибольшим свечением обладает область ДЭГ, а наименьшим область эмали, в то же время формы спектров очень схожи друг с другом для всех источников возбуждения. Это дает основание сделать предположение о том, что центры люминесценции в эмали, дентине и ДЭГ имеют единую природу. При этом наблюдается смещение максимума флюоресценции в длинноволновую область при увеличении длины волны возбуждения. Показано, что интенсивность флюоресценции интактных зубов существенно зависит от области исследования. Сделано предположение о том, что вклад в флюоресценцию твердых тканей зубов вносят несколько эндогенных флюорофоров, прежде всего структурные вещества белков коллагена и амелогенина, а также нестехиометрические кристаллы гидроксилапатита кальция.

Keywords

ЛАЗЕРНО-ИНДУЦИРОВАННАЯ ФЛЮОРЕСЦЕНЦИЯ, ДЕНТИН, ЭМАЛЬ, ДЕНТИННО-ЭМАЛЕВАЯ ГРАНИЦА, КРИСТАЛЛЫ ГИДРОКСИЛАПАТИТА КАЛЬЦИЯ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold