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The aim of this study was a qualitative comparison of ablation effects induced by different laser parameters. Three self-built laser systems were applied to the enamel of extracted human teeth: a microsecond Ho:YAG laser at a wavelength of 2.12 μm, a microsecond Er:YAG laser at 2.94 μm, and a picosecond Nd:YLF laser system at 1.053 μm. After laser irradiation, the teeth were critical point dried, coated with a gold layer of about 30 nm, and examined by a scanning electron microscope (Amray 1810).
© 1994 IEEE
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