QスイッチNd:YAGレーザによる生体骨の除去加工(OS.15 レーザビームを用いた応用物理と先端技術)

概要

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To clarify suitable oscillating characteristics of Nd:YAG laser for removal of biological bone, the experimental study was carried out. Femurs of cattle were used as specimen, and then they were drilled with three different YAG-laser oscillators. Around the holes drilled with the lasers, the white and black layers, which are seems the thermal affected layers, were generated. Volume of material removed increases with irradiated energy of laser. However the removal efficiency decreases for the low peak-power laser because the storage of heat in the specimens required making up for energy shortage. In case of the laser with low peak-power and long pulse duration, the irradiation causes increase of storage heat, and then makes the thermal affected layer thick. From these results, to remove biological bone with Nd:YAG laser in free of damage, it is found that the laser has to oscillate with high peak-power and short pulse duration.
社団法人日本機械学会の論文
2004-03-03