Enhancement of Bovine Bone Ablation Assisted by a Transparent Liquid Layer on a Target Surface

H.W. Kang, H. Lee, S. Chen, A.J. Welch
2006 IEEE Journal of Quantum Electronics  
The purpose of this study was to investigate the laserinduced ablation of bovine bone assisted by a transparent liquid layer on top of the target surface. A Q-switched Nd:YAG laser was used to ablate bovine tibia at various energy levels. Distilled water was applied to the sample surface in order to examine the role of a transparent liquid layer during the ablation. Plasma generation and transient acoustic waves were monitored to identify dominant mechanisms involved in the ablation process.
more » ... ation efficiency was measured from the cross-sectional tomography acquired by optical coherence tomography (OCT). Ablation with a liquid layer lowered the damage threshold and enhanced both the laser-induced acoustic excitation and the ablation efficiency, which saturated at higher radiant exposures. The enhanced ablation of the liquid-assisted process is primarily due to photomechanical effects associated with explosive vaporization and plasma confinement. The saturation of the pressure amplitude and ablation efficiency was attributed to increased plasma shielding.
doi:10.1109/jqe.2006.875867 fatcat:53evw7wow5axznxtd4pny5i6zi