Tailored ablation processing of advanced biomedical hydroxyapatite by femtosecond laser pulses
Tailored ablation processing of advanced biomedical hydroxyapatite by femtosecond laser pulses
复制标题
通过飞秒激光脉冲对先进生物医学羟基磷灰石进行定制烧蚀加工
DOI：
10.1007/s00339-003-2119-3
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Obara
中科院分区：
文献类型：
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作者：
K. Ozono;M. Obara
羟基磷灰石（HAp）的微加工对于骨科和牙科非常重要，因为人体骨骼和牙齿主要由HAp组成。我们展示了超短钛：蓝宝石激光烧蚀HAp，使用50 fs，500 fs，和2 ps的脉冲宽度在820 nm的波长和1 kpps。关键的医疗问题是保持机械加工（烧蚀）表面的化学性质。如果HAp的化学性质发生变化，人体骨骼或牙齿在激光处理后无法重新生长。利用X射线光电子能谱，我们观察了HAp在空气中烧蚀后的化学性质。分别在3.2 J/cm 2（6.4× 1013 W/cm 2，50 fs）、3.3 J/cm 2（6.6× 1012 W/cm 2，500 fs）和9.6 J/cm 2（4.8× 1012 W/cm 2，2 ps）的激光能量密度下烧蚀HAp。结果发现，在本实验中使用的脉冲宽度范围内，激光烧蚀后，烧蚀表面没有变化。
The micromachining of hydroxyapatite (HAp) is highly important for orthopedics and dentistry, since human bone and teeth consist mainly of HAp. We demonstrate ultrashort Ti:sapphire laser ablation of HAp, using pulse-widths of 50 fs, 500 fs, and 2 ps at a wavelength of 820 nm and at 1 kpps. The crucial medical issue is to preserve the chemical properties of the machined (ablated) surface. If the chemical properties of HAp change, the human bone or tooth cannot re-grow after laser processing. Using X-ray photoelectron spectroscopy, we observe chemical properties of HAp ablated in air. The HAp is ablated at laser fluences of 3.2 J/cm2(6.4×1013W/cm2at 50 fs), 3.3 J/cm2(6.6×1012W/cm2at 500 fs), and 9.6 J/cm2(4.8×1012W/cm2at 2 ps), respectively. As a result it is found that the ablated surface is unchanged after laser ablation over the pulse-width range used in this experiment.