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首页> 外文期刊>Optics & Laser Technology >Effects of Yb:KYW thin-disk femtosecond laser ablation on enamel surface roughness
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Effects of Yb:KYW thin-disk femtosecond laser ablation on enamel surface roughness

机译：Yb：KYW薄盘飞秒激光烧蚀对搪瓷表面粗糙度的影响

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摘要

This study aimed to quantitatively evaluate the surface roughness of enamel following ablation with a Yb:KYW thin-disk femtosecond pulsed laser at different fluences (F), scanning speeds and scanning line spacings. Thirty human extracted teeth were sectioned into crowns and roots along the cementum-enamel junction, and then the crowns were cut longitudinally into sheets about 1.5 mm thick. The samples were randomly divided into ten groups (n = 3). Samples of groups 1-8 were irradiated with a femtosecond pulsed laser. These enamel samples were fixed on a stage at focus plane, and a laser beam irradiated onto the samples through a galvanometric scanning system, with which rectangular movement could be achieved. Samples of groups 9 and 10 were prepared with grinding instruments. Following ablation and preparation, the samples were examined for surface roughness with a three-dimensional laser profile measurement microscope. The results showed that scanning speed and scanning line spacing had little influence on the surface roughness of femtosecond pulsed laser-ablated enamel, except when F=4 J/cm~2. When a lower fluence was used, the enamel surface roughness was higher, and vice versa. This study showed that various laser fluences, scanning speeds and scanning line spacings can affect and alter enamel surface roughness. Therefore, adequate parameters should be chosen to achieve the proper therapeutic benefits.
机译：这项研究旨在定量评估Yb：KYW薄盘飞秒脉冲激光在不同注量（F），扫描速度和扫描行距下烧蚀后牙釉质的表面粗糙度。将三十个人拔出的牙齿沿牙骨质-牙釉质交界处切成冠和根，然后将冠纵向切成约1.5毫米厚的薄片。将样本随机分为十组（n = 3）。用飞秒脉冲激光照射第1-8组的样品。将这些搪瓷样品固定在聚焦面上的平台上，然后通过检流扫描系统将激光束照射到样品上，从而实现矩形移动。用研磨仪器制备第9组和第10组的样品。消融和制备后，用三维激光轮廓测量显微镜检查样品的表面粗糙度。结果表明，除了F = 4 J / cm〜2以外，扫描速度和扫描线间距对飞秒脉冲激光烧蚀搪瓷的表面粗糙度影响不大。当使用较低的通量时，搪瓷表面粗糙度较高，反之亦然。这项研究表明，各种激光通量，扫描速度和扫描线间距都可以影响和改变搪瓷表面的粗糙度。因此，应选择适当的参数以获得适当的治疗益处。

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