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Journal of Biomedical Optics

Porcine cortical bone ablation by ultrashort pulsed laser irradiation
Author(s): Brent J. Emigh; Joseph E. Hayward; Ran An; Eugene M. Hsu; Travis H. Crawford; Harold K. Haugen; Gregory R. Wohl; Qiyin Fang
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Paper Abstract

Ultrashort pulsed lasers in bone ablation show promise for many orthopedic applications. To minimize collateral tissue damage and control the ablation process, the ablation threshold fluence must be well characterized. Using an amplified femtosecond laser (170 fs, 800 nm, 1 kHz), the ablation threshold on unaltered porcine cortical bone was measured using the D2 method at multiple incident pulse numbers ranging from 25 to 1000 pulses per spot. The lowered threshold at greater pulse numbers indicated an incubation effect. Using a power law model, the incubation coefficient of unaltered porcine cortical bone was found to be 0.89 ± 0.03. Through extrapolation, the single-pulse ablation threshold was found to be 3.29 ± 0.14  J/cm2.

Paper Details

Date Published: 27 February 2012
PDF: 7 pages
J. Biomed. Opt. 17(2) 028001 doi: 10.1117/1.JBO.17.2.028001
Published in: Journal of Biomedical Optics Volume 17, Issue 2
Show Author Affiliations
Brent J. Emigh, McMaster Univ. (Canada)
Joseph E. Hayward, McMaster Univ. (Canada)
Ran An, McMaster Univ. (Canada)
Eugene M. Hsu, McMaster Univ. (Canada)
Travis H. Crawford, McMaster Univ. (Canada)
Harold K. Haugen, McMaster Univ. (Canada)
Gregory R. Wohl, McMaster Univ. (Canada)
Qiyin Fang, McMaster Univ. (Canada)

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