Raman spectroscopic studies of CO2 laser-irradiated human dental enamel

被引:43
作者
Aminzadeh, A [1 ]
Shahabi, S
Walsh, LJ
机构
[1] Isfahan Univ Technol, Coll Chem, Esfahan, Iran
[2] Isfahan Univ Med Sci, Fac Dent, Esfahan, Iran
[3] Univ Queensland, Dept Dent, Brisbane, Qld, Australia
基金
澳大利亚研究理事会;
关键词
Raman spectroscopy; CO2; laser; human dental enamel; hydroxyapatite;
D O I
10.1016/S1386-1425(99)00035-9
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
While the effects of carbon dioxide (CO2) laser radiation on the physical properties of human dental enamel are well characterized, little is known regarding laser-induced chemical changes. In this study, enamel was exposed to CO2 laser radiation to induce fusion and recrystallization, and the Raman spectra recorded using both dispersive and Fourier-transformed (FT) Raman spectroscopy. Spectra were compared to a heat-treated specimen of hydroxyapatite (HAP) and enamel. Laser irradiation induced chemical changes which differed from those induced by heat treatment. Comparing the Raman spectra of lased enamel to HAP and tricalcium phosphate (TCP), it is evident that CO2 laser irradiation of enamel causes the partial conversion of HAP to TCP. The effect of laser irradiation is not merely a simple local heating effect as previously thought, since simple heating of enamel leads to the formation of both TCP and Ca(OH)(2), while laser treatment of enamel results in the formation of TCP but not Ca(OH)(2). (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1303 / 1308
页数:6
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