Infrared spectroscopy of laser-irradiated dental hard tissues using the Advanced Light Source

Daniel Fried; Thomas Breunig

doi:10.1117/12.424501

27 April 2001 Infrared spectroscopy of laser-irradiated dental hard tissues using the Advanced Light Source

Daniel Fried, Thomas Breunig

Proceedings Volume 4249, Lasers in Dentistry VII; (2001) https://doi.org/10.1117/12.424501
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

FTIR spectroscopy used in the specular reflectance mode is well suited for resolving thermally induced changes in dental hard tissue as a result of laser irradiation. High spatial resolution is achievable with a high brightness synchrotron radiation source such as the ALS at Lawrence Berkeley National Laboratory. IR spectra of modified enamel were acquired after laser ablation using several laser wavelengths from the UV to the mid-IR. Specific areas of laser ablation craters were probed non-destructively with 10-micrometers spatial resolution. The chemical composition of the crater walls deviates markedly from that of hydroxyapatite after Er:YAG and CO₂ laser irradiation without added water. New mineral phases were resolved that have not been previously observed using conventional IR spectroscopy.

Citation Download Citation

Daniel Fried and Thomas Breunig "Infrared spectroscopy of laser-irradiated dental hard tissues using the Advanced Light Source", Proc. SPIE 4249, Lasers in Dentistry VII, (27 April 2001); https://doi.org/10.1117/12.424501

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