The aim of this study was to investigate the effects of different surface treatment methods on shear bond strength between composite resin and different levels of zirconia ceramic. Laser surface-conditioning procedures have been reported as effective method to increase repair bond strength of composite to zirconia ceramics. Detailed information of effects of Er,Cr:YSGG laser treatment with different pulse rates on the zirconia ceramics is lacking in the literature. 120 disc-shaped specimens were prepared including zirconia, veneering ceramic, and 50% veneering ceramic-50% zirconia surfaces. Four different surface treatments were applied to the specimens. These were grinding with diamond bur, sandblasting, and short and long pulse rates of Er,Cr:YSGG laser irradiation. An intraoral ceramic repair kit was used to repair specimens, and shear bond strength was performed on the composite resin to each specimen. The highest mean bond strength was seen in the veneering ceramic surface that was ground using a diamond bur, and the lowest mean bond strength value was observed in the same surface that was treated with long pulse laser irradiation. The sandblasting with alumina particles exhibited lower mean repairing bond strength among the rest of used methods in this study for the group which contained half of the veneering ceramic and half of the zirconia. Sandblasting and Er,Cr:YSGG laser using surface treatment procedures obtained appropriate bond strength for the group that included 50% veneering ceramic-50% zirconia, because of no significant differences observed among the applied surface conditioning methods in this group.

中文翻译：

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各种表面处理方法对复合材料对不同断裂类型氧化锆陶瓷修复结合强度的影响评价

本研究的目的是研究不同表面处理方法对复合树脂与不同含量氧化锆陶瓷之间剪切结合强度的影响。据报道，激光表面处理程序是提高复合材料与氧化锆陶瓷的修复结合强度的有效方法。文献中缺乏关于不同脉冲频率下 Er,Cr:YSGG 激光处理对氧化锆陶瓷的影响的详细信息。制备了 120 个圆盘形试样，包括氧化锆、饰面陶瓷和 50% 饰面陶瓷-50% 氧化锆表面。对样品进行了四种不同的表面处理。这些是用金刚石车针研磨、喷砂以及短脉冲和长脉冲 Er,Cr:YSGG 激光照射。口腔内陶瓷修复套件用于修复标本，并对每个试样的复合树脂进行剪切粘合强度。在使用金刚石车针研磨的饰面陶瓷表面中观察到最高的平均结合强度值，在用长脉冲激光照射处理的同一表面中观察到最低的平均结合强度值。在本研究的其余使用方法中，用氧化铝颗粒进行喷砂处理的平均修复结合强度较低，该方法包含一半的饰面陶瓷和一半的氧化锆。喷砂和使用表面处理程序的 Er,Cr:YSGG 激光为包含 50% 贴面陶瓷 - 50% 氧化锆的组获得了适当的结合强度，因为在该组中应用的表面处理方法之间没有观察到显着差异。