Femtosecond laser for cavity preparation in enamel and dentin: ablation efficiency related factors.
Femtosecond laser for cavity preparation in enamel and dentin: ablation efficiency related factors.
复制标题
飞秒激光用于牙釉质和牙本质腔预备：消融效率相关因素
DOI：
10.1038/srep20950
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发表时间：
2016-02-11
影响因子：
4.6
通讯作者：
Lü P
中科院分区：
文献类型：
--
作者：
Chen H;Li H;Sun Y;Wang Y;Lü P
研究飞秒激光能量密度、扫描线距和烧蚀深度对飞秒激光三维消融牙釉质和牙本质效率的影响。采用激光二极管泵浦的薄片飞秒激光(波长1025 nm，脉宽400 飞秒)消融牙釉质和牙本质。激光光斑被引导到牙釉质和牙本质表面上一系列重叠的平行线上，形成三维空洞。然后在三维测量显微镜下测量消融腔的深度和体积，以确定消融效率。采用不同的消融剂量、扫描线间距和消融深度来评估每个变量对消融效率的影响。牙釉质和牙本质的消融效率在不同的激光剂量和扫描行数下达到最大，随着激光剂量的增加或超过光斑直径的扫描行距的增加或随着消融深度的增加而降低。激光通量、扫描线间距和烧蚀深度都对飞秒激光烧蚀效率有显著影响。对这些参数进行合理的控制，将会改善未来的临床应用。
To study the effects of laser fluence (laser energy density), scanning line spacing and ablation depth on the efficiency of a femtosecond laser for three-dimensional ablation of enamel and dentin. A diode-pumped, thin-disk femtosecond laser (wavelength 1025 nm, pulse width 400 fs) was used for the ablation of enamel and dentin. The laser spot was guided in a series of overlapping parallel lines on enamel and dentin surfaces to form a three-dimensional cavity. The depth and volume of the ablated cavity was then measured under a 3D measurement microscope to determine the ablation efficiency. Different values of fluence, scanning line spacing and ablation depth were used to assess the effects of each variable on ablation efficiency. Ablation efficiencies for enamel and dentin were maximized at different laser fluences and number of scanning lines and decreased with increases in laser fluence or with increases in scanning line spacing beyond spot diameter or with increases in ablation depth. Laser fluence, scanning line spacing and ablation depth all significantly affected femtosecond laser ablation efficiency. Use of a reasonable control for each of these parameters will improve future clinical application.