The goal of the work was the investigation of powerful Er: YSGG radiation (wavelength 2.79 um) interaction with ivory and dentin. The main goal was an investigation of powerful Er: YSGG radiation interaction with ivory and dentin. As source of radiation was used a free-running or Q-switched Er: YSGG laser generating 250 us or 100 ns long pulses with pulse energy of 123 mJ or 41 mJ, respectively. The lens with the focal length 85 mm was used for concentration of the radiation on interacting material. The ablation rate was checked for case of both above mentioned regimes as well as for the cases of without and with water cooling of interacting material. It was found that for long pulse with the energy density of 176 J/cm² the ablation rate was 0.033 mm³/J (without water cooling), while for short 100 ns with the energy density of 46 J/cm² the ablation rate was 0.012 mm³/J (with water cooling).

Date Published: 24 February 2015
PDF: 5 pages
Proc. SPIE 9306, Lasers in Dentistry XXI, 930603 (24 February 2015); doi: 10.1117/12.2077584

Published in SPIE Proceedings Vol. 9306:
Lasers in Dentistry XXI
Peter Rechmann; Daniel Fried, Editor(s)