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Journal of Biomedical Optics

Femtosecond laser ablation of dentin and enamel: relationship between laser fluence and ablation efficiency
Author(s): Hu Chen; Jing Liu; Hong Li; Wenqi Ge; Yuchun Sun; Yong Wang; Peijun Lü
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Paper Abstract

The objective was to study the relationship between laser fluence and ablation efficiency of a femtosecond laser with a Gaussian-shaped pulse used to ablate dentin and enamel for prosthodontic tooth preparation. A diode-pumped thin-disk femtosecond laser with wavelength of 1025 nm and pulse width of 400 fs was used for the ablation of dentin and enamel. The laser spot was guided in a line on the dentin and enamel surfaces to form a groove-shaped ablation zone under a series of laser pulse energies. The width and volume of the ablated line were measured under a three-dimensional confocal microscope to calculate the ablation efficiency. Ablation efficiency for dentin reached a maximum value of 0.020  mm3/J when the laser fluence was set at 6.51  J/cm2. For enamel, the maximum ablation efficiency was 0.009  mm3/J at a fluence of 7.59  J/cm2. Ablation efficiency of the femtosecond laser on dentin and enamel is closely related to the laser fluence and may reach a maximum when the laser fluence is set to an appropriate value.

Paper Details

Date Published: 19 February 2015
PDF: 5 pages
J. Biomed. Opt. 20(2) 028004 doi: 10.1117/1.JBO.20.2.028004
Published in: Journal of Biomedical Optics Volume 20, Issue 2
Show Author Affiliations
Hu Chen, Peking Univ. School of Stomatology (China)
Jing Liu, Peking Univ. School of Stomatology (China)
Hong Li, Peking Univ. School of Stomatology (China)
Wenqi Ge, Academy of Opto-Electronics (China)
Yuchun Sun, Peking Univ. School of Stomatology (China)
Yong Wang, Peking Univ. School of Stomatology (China)
Peijun Lü, Peking Univ. School of Stomatology (China)


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