19 February 2015 Femtosecond laser ablation of dentin and enamel: relationship between laser fluence and ablation efficiency
Author Affiliations +
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.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hu Chen, Hu Chen, Jing Liu, Jing Liu, Hong Li, Hong Li, Wenqi Ge, Wenqi Ge, Yuchun Sun, Yuchun Sun, Yong Wang, Yong Wang, Peijun Lü, Peijun Lü, } "Femtosecond laser ablation of dentin and enamel: relationship between laser fluence and ablation efficiency," Journal of Biomedical Optics 20(2), 028004 (19 February 2015). https://doi.org/10.1117/1.JBO.20.2.028004 . Submission:
JOURNAL ARTICLE
5 PAGES


SHARE
Back to Top