Zirconia is a dental material that shows excellent biocompatibility and high strength in clinical applications. This study aims to evaluate the effects of ultrafast laser applications. The surface nanostructures were classified into three groups. Group 1 was generated using the burst mode, with three different distances between dots: 52 µm (Group 1a), 104 µm (Group 1b), and 156 µm (Group 1c). Group 2 was processed using the scanning mode configuration, with a set of parallel lines. Group 3 was also processed using this scanning configuration creating a set of square‐shaped patterning. Group 4 was the control group. After the surface treatments, a pair of zirconia specimens was bonded end to end with resin cement. Flexural bond strength (FBS) test was applied in a universal test machine. Multiple comparisons were performed using a one‐way analysis of variance and the Tukey's HSD test. All the samples that were treated with the laser showed higher FBS values than the untreated surface. Using the burst mode, preformed circular‐shaped surface on an angle of 90⁰ at 52 µm distance (Group 1a) showed the highest FBS values among all groups (p < .05). Groups 2 and 3 had significantly higher values than 1b and 1c.

中文翻译：

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亚纳秒紫外激光通过表面构图提高氧化锆树脂水泥的挠曲粘结强度

氧化锆是一种牙科材料，在临床应用中具有出色的生物相容性和高强度。这项研究旨在评估超快激光应用的效果。表面纳米结构分为三类。使用突发模式生成组1，点之间具有三个不同的距离：52 µm（组1a），104 µm（组1b）和156 µm（组1c）。使用扫描模式配置和一组平行线对第2组进行处理。还使用此扫描配置处理了第3组，创建了一组方形图案。第4组为对照组。表面处理后，用树脂水泥将一对氧化锆样品首尾相连。弯曲粘结强度（FBS）测试应用于通用测试机中。使用单向方差分析和Tukey的HSD检验进行多次比较。用激光处理的所有样品均显示出比未处理表面更高的FBS值。使用爆发模式，以90度角形成预制的圆形表面在52 µm距离处的⁰（组1a）显示了所有组中最高的FBS值（p  <.05）。第2组和第3组的值明显高于1b和1c。