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Effect of 2.94 µm Er: YAG laser on the chemical composition of hard tissues
Author(s) -
Aljdaimi Abtesam,
Devlin Hugh,
Dickinson Mark,
Alfutimie Abdullatif
Publication year - 2018
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.23051
Subject(s) - fourier transform infrared spectroscopy , dentin , scanning electron microscope , irradiation , spectroscopy , chemical composition , analytical chemistry (journal) , enamel paint , laser , chemistry , nuclear chemistry , calcium , er:yag laser , phosphorus , materials science , energy dispersive x ray spectroscopy , optics , chromatography , metallurgy , composite material , physics , organic chemistry , quantum mechanics , nuclear physics
Abstract The aim was to investigate the effect of the Er‐YAG laser radiation on morphology and chemical composition of enamel, dentin, and bone. The specimens of the three groups were irradiated with a very long pulse mode (VLP) of 2.94 µm Er‐YAG laser with 100 mJ pulse energy and energy density of 8.42 J/ c m 2for 30 s, at a repetition rate of 15 Hz. The organic and inorganic content of the samples were investigated by Fourier Transforms Infrared spectroscopy (FTIR). The morphological characteristics were investigated with scanning electron microscopy (SEM) and elemental analysis (calcium and phosphorus) with energy‐dispersive X‐ray spectroscopy (EDX). FTIR data were analyzed with a One‐Way ANCOVA test and EDX data with the independent sample t ‐test. Following the laser radiation, FTIR showed a significant decrease in the organic content of all tissues. The weight percentage (wt %) calcium content of dentin and bone increased significantly following irradiation with a p ‐value of .002 for both tissues, but the wt % of phosphorus content was not influenced significantly. The morphological alterations expressed signs of fusion in all the samples.