Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, I-43124 Parma, Italy; Micoralis Laboratory EA7354, Faculty of Dentistry, University of Nice Sophia Antipolis, 24 Avenue des Diables Bleus, 06357 Nice, France.
Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, I-43124 Parma, Italy.
J Photochem Photobiol B. 2021 Jun;219:112189. doi: 10.1016/j.jphotobiol.2021.112189. Epub 2021 Apr 15.
The increasing demand for aesthetics, together with advancements in technology, have contributed to the rise in popularity of all-ceramic restorations. In the last two decades, the continuous progression in ceramic materials science for dental applications has permitted the fabrication of high-strength materials. Amongst these, zirconia-based ceramics have improved in terms of fracture resistance and long-term viability in comparison with other silica-based materials. Unfortunately, while bonding of resin cement-silica ceramics can be strengthened through creation of a porous surface by applying hydrofluoric acid (5%-9.5%) and a subsequent silane coupling agent, the glass-free polycrystalline microstructure of zirconia ceramics does not allow such a reaction. The aim of the present in vitro study was to observe the effect of 1070 nm fiber nanosecond pulse laser irradiation on zirconia samples through morphological analysis (profilometry, SEM), thermal recording with Fiber Bragg Gratings (FBGs), elemental composition analysis (EDX) and bond strength testing (mechanical tests) in order to evaluate the possible advantages of this kind of treatment on zirconia surfaces, as well as to show the potential side effects and changes in chemical composition. Despite laser irradiation with a 1070 nm wavelength fiber laser and correct process parameters demonstrating suitable outcomes in terms of improved surface roughness and minimal thermal damage, comparison between irradiated and unirradiated samples did not exhibit statistically significant differences in terms of bonding strength.
随着人们对美学的需求不断增加，以及技术的进步，全瓷修复体越来越受欢迎。在过去的二十年中，牙科应用陶瓷材料科学的不断进步使得高强度材料的制造成为可能。在这些材料中，与其他基于硅的材料相比，氧化锆基陶瓷在抗断裂性和长期生存能力方面有所提高。不幸的是，虽然通过应用氢氟酸（5%-9.5%）和随后的硅烷偶联剂在表面制造多孔结构可以增强树脂粘结剂-硅基陶瓷的粘结，但氧化锆陶瓷的无玻璃多晶微观结构不允许这种反应。本体外研究的目的是通过形态分析（轮廓测量、SEM）、光纤布拉格光栅（FBG）的热记录、元素组成分析（EDX）和粘结强度测试（力学测试）观察 1070nm 光纤纳秒脉冲激光对氧化锆样品的影响，以评估这种处理方法对氧化锆表面的可能优势，并显示潜在的副作用和化学成分变化。尽管使用 1070nm 光纤激光器进行激光辐照和正确的工艺参数显示出了改善表面粗糙度和最小热损伤方面的合适结果，但辐照和未辐照样品之间的粘结强度比较并没有显示出统计学上的显著差异。
