Arslan Hakan, Barutcigil Cagatay, Yılmaz Cenk Burak, Ceyhanlı Kadir Tolga, Topcuoglu Hüseyin Sinan
Department of Endodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey.
Photomed Laser Surg. 2013 Jul;31(7):328-33. doi: 10.1089/pho.2013.3478. Epub 2013 Jun 11.
The aim of this study was to evaluate the effects of different surface treatments on the pushout bond strength of fiber-reinforced posts to composite resin cores.
Twenty-five translucent glass fiber posts were divided into five groups according to surface treatment methods as follows: an untreated control group, a group coated with silicated alumina particles (Co-Jet system, 3M ESPE, St. Paul, MN), and three groups undergoing surface preparation with erbium:yttrium-aluminum-garnet (Er:YAG) laser under three different power settings (150, 300, and 450 mJ at 10 Hz for 60 sec at 100 μs duration). After surface treatment, fiber posts were built up to a dual cure composite resin core. All of the specimens were set and sectioned perpendicularly along the long axis of the post using a saw. Two discs (thickness of 2 mm) were obtained from each post-core sample; finally, each group consisted of 10 samples. For artificial aging, the specimens were stored in water (37°C) for 24 h and subjected to thermal cycling (5000 cycles, 5-55°C, and 30 sec dwell time). Pushout tests were performed using a universal testing machine at a crosshead speed of 0.5 mm/min. The pushout pressure values were measured in MPa and analyzed using one way analysis of variance (ANOVA) and Tukey's honestly significant difference (HSD) post-hoc test (p<0.05). Fiber post surface images were obtained using a scanning electron microscope (SEM).
The bond strength values ranged between 14,949 and 23,879 MPa. The lowest values were observed in the groups treated with the Er:YAG laser at 150 mJ. Irradiation by the Er:YAG laser at 450 mJ affected the bond strength significantly (p<0.05). After Co-Jet sandblasting, the bond strength increased relatively (19,184 MPa).
Er:YAG laser irradiation enhanced the bond strength of fiber-reinforced posts to composite resin cores depending upon the power applied; Co-Jet sandblasting also increased the bond strength.
本研究旨在评估不同表面处理对纤维增强桩与复合树脂核之间推出粘结强度的影响。
将25根半透明玻璃纤维桩根据表面处理方法分为五组，如下：未处理的对照组、涂有硅化氧化铝颗粒的组（Co-Jet系统，3M ESPE，明尼苏达州圣保罗），以及三组在三种不同功率设置下用铒：钇铝石榴石（Er:YAG）激光进行表面处理的组（10Hz频率下150、300和450mJ，持续时间100μs，照射60秒）。表面处理后，用双固化复合树脂核构建纤维桩。所有标本固化后，用锯沿桩的长轴垂直切片。从每个桩核样本中获得两个圆盘（厚度2mm）；最后，每组由10个样本组成。为进行人工老化，将标本在水中（37°C）储存24小时，然后进行热循环（5000次循环，5 - 55°C，保压时间30秒）。使用万能试验机以0.5mm/min的十字头速度进行推出试验。推出压力值以MPa为单位测量，并使用单因素方差分析（ANOVA）和Tukey's真实显著差异（HSD）事后检验进行分析（p<0.05）。使用扫描电子显微镜（SEM）获取纤维桩表面图像。
粘结强度值在14949至23879MPa之间。在150mJ的Er:YAG激光处理组中观察到最低值。450mJ的Er:YAG激光照射对粘结强度有显著影响（p<0.05）。Co-Jet喷砂处理后，粘结强度相对增加（19184MPa）。
Er:YAG激光照射根据施加的功率增强了纤维增强桩与复合树脂核之间的粘结强度；Co-Jet喷砂处理也提高了粘结强度。
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