PMID: 15348301Sep 7, 2004Paper

Compositional and morphological imaging of CO2 laser irradiated human teeth by low vacuum SEM, confocal laser scanning microscopy and atomic force microscopy

Journal of Materials Science. Materials in Medicine
Fumio Watari

Abstract

Enamel and dentin of human teeth irradiated by CO2 laser were investigated by confocal laser scanning microscopy (CLSM), low vacuum scanning electron microscopy (WET-SEM) and atomic force microscopy (AFM). Optical tomographic imaging by CLSM, compositional imaging based on atomic number effect of reflected electrons by WET-SEM, high resolution observation of surface morphology by AFM were done for both the irradiated and non-irradiated area of the same specimen throughout. The crystals of about 50 microm length and the bright spots were observed by CLSM at the bottom of the cavity induced by laser irradiation. They turned out from the observation by WET-SEM as the acicular crystals with the cross section of an irregularly hexagonal shape situated parallel and perpendicular, respectively, to the inner surface of the cavity. The thickness of the thermally deteriorated zone of the cavity was about 25 microm. The crystals unidirectionally grown up to the size of several hundreds nm were also observed by AFM, while the apatite crystallites of 50-150 nm were recognized all over in non-irradiated area. All the results suggest that after instantaneous melting at the surface of teeth by CO2 laser shot the crystals of calcium phosphate w...Continue Reading

Citations

Sep 16, 2004·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Magda K YamadaFumio Watari
Dec 13, 2016·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Matthias SchäperJörg Meister
Mar 23, 2011·Photomedicine and Laser Surgery·Laura Emma Rodríguez-VilchisClaudia Centeno-Pedraza
Feb 6, 2008·Photomedicine and Laser Surgery·Iris Slutzky-GoldbergJoshua Moshonov
Apr 15, 2009·Journal of the Royal Society, Interface·Fumio WatariKazuyuki Tohji
Nov 27, 2008·Journal of Materials Science. Materials in Medicine·S I HongD H Kohn

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