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Bovine cortical bone ablation by femtosecond laser (Conference Presentation)
Author(s): Fahad Aljekhedab; Wenbin Zhang; Jonathan Favero; Harold K. Haugen; Gregory R. Wohl; Qiyin Fang

Paper Abstract

Ultrashort lasers are promising tools for surgical and dental applications where precise cutting of hard tissue is required with minimal collateral tissues damage. We report the use of an amplified femtosecond laser (800 nm, 210 fs, 1 kHz, and up to 200 µJ) to generate high aspect ratio structures on bovine bone samples. The ablation fluence threshold of bovine bone was determined and the incubation effect was observed. The incubation coefficient and the single-pulse ablation threshold were calculated to be 0.90±0.02 and 1.43±0.09 J/cm2, respectively. The influence of experimental conditions on laser ablation were also investigated by performing craters with dimensions of 1000 x 220 µm under dry, compressed air, and flowing water treatments during ablation. Our results show that compressed air treatment produced the lower roughness of crater walls as well as highest depth, compared with those of dry and water conditions. The craters produced in dry and compressed air treatment have a “V” shape, while a “U” shape was observed when using flowing water treatment.

Paper Details

Date Published: 14 March 2018
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Proc. SPIE 10473, Lasers in Dentistry XXIV, 104730F (14 March 2018); doi: 10.1117/12.2289331
Show Author Affiliations
Fahad Aljekhedab, McMaster Univ. (Canada)
Wenbin Zhang, Shanghai 9th People’s Hospital, Shanghai Jiao Tong Univ. School of Medicine (China)
Jonathan Favero, McMaster Univ. (Canada)
Harold K. Haugen, McMaster Univ. (Canada)
Gregory R. Wohl, McMaster Univ. (Canada)
Qiyin Fang, McMaster Univ. (Canada)


Published in SPIE Proceedings Vol. 10473:
Lasers in Dentistry XXIV
Peter Rechmann; Daniel Fried, Editor(s)

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