| Water play an action that not only have the effects of cleaning wounds and reduce the thermal damage, but also enhance ablation efficiency, under the condition of certain irradiation during the process of laser ablation hard tissue. It’s the emphasis and difficulty in the field that the reasonable explanation enhancing water mediated effect of ablation efficiency. Based on the development trend of laser ablation technology and the application of high-speed imaging technology, using the pulsed CO2 laser with a wavelength of λ=10.64μm for radiation source, and launched on pulsed CO2. laser interaction with water medium, water mediated pulsed CO2 laser ablation bovine tibia experimental study.Firstly, summarizes the basic components of biological bone hard tissue and biological characteristics, this paper expounds the pulsed laser ablation bone hard tissue mechanism of ablation and ablation model of pulse laser water mediated biological hard tissue ablation mechanism and the current main ablation monitoring method.Secondly, using high-speed imaging technology to investigate pulse CO2 laser in different focus irradiation condition (focus position, pre-focus position and post-focus position) on the induction of the formation and development of vapor channel and the effect of dynamic process of collapse.Again, using high-speed imaging technology, and use prime lens and microscopic lens respectively, monitoring water film layer mediated pulsed CO2 laser ablation the dynamic process of bovine tibia tissue samples of the growth of vapor channel-breaking process are studied, and the ablation of skeletal tracking.Finally, examine the wavelength λ= 10.64 μm pulsed CO2 laser with different absorption coefficient of the liquid film layer (pure water with μa= 817 cm-1 and trace of ink mixing water μa=926 cm-1) mediates the effect of pulsed CO2 laser ablation bovine tibia organization, both study the influence of different thickness of liquid film on the ablation. |
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