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Abstract：
This study evaluated a new method of adhesive system application on the bond strength between fiber post and root dentin using two adhesive systems. The canals of sixty bovine incisors were prepared and obturated. The roots were divided into six groups (n=10) according to the adhesive system (Clearfil SE - CSE and Single Bond Universal - SBU) and the application strategy (microbrush - MB; rotary brush - RB; and ultrasonic tip - US). The glass fiber posts were cemented with resin cement (RelyX ARC). The roots were sectioned perpendicularly to their long axis, and three slices per root were obtained. Previously to the push-out test, confocal laser scanning microscopy (CLSM) was performed to illustrate the interfacial adaptation of the cement to the root canal walls. Failure patterns were analyzed with 40x magnification. Shapiro-Wilk indicated a normal distribution of the data. The bond strength values were compared using one-way ANOVA and Tukey\'s tests. Student\'s T test analyzed the differences between the adhesive systems within each third and protocol. A significance level of 5% was used. CSE with RB showed higher mean bond strength values compared to MB (conventional technique) (P < 0.05). US application resulted in intermediate bond strength values for CSE (P > 0.05). The application of SBU using RB generated higher mean bond strength values compared to MB and US (P < 0.05). Adhesive failures were predominant (65.5%). CSE and SBU application with the new rotary brush improved the bond strength of fiber posts to root dentin compared to the conventional strategy.
摘要：
本研究使用两种粘合剂系统评估了粘合剂系统应用于纤维桩和牙根牙本质之间的粘合强度的新方法。准备并封闭了60个牛门牙的管。根据粘合剂系统（ClearfilSE-CSE和SingleBondUniversal-SBU）和应用策略（微刷-MB；旋转刷-RB；和超声尖端-US），将根部分为六组（n=10）。玻璃纤维柱用树脂水泥(RelyXARC)胶结。根部垂直于它们的长轴剖开，并获得每根三个切片。在推出测试之前，进行了共聚焦激光扫描显微镜（CLSM），以说明水泥对根管壁的界面适应性。用40倍放大倍数分析失效模式。Shapiro-Wilk表示数据呈正态分布。使用单向方差分析和Tukey's检验比较粘结强度值。Student\'sT测试分析了每三分之一和协议中粘合剂系统之间的差异。使用5%的显著性水平。与MB(常规技术)相比,具有RB的CSE显示出更高的平均粘结强度值(P<0.05)。美国申请导致CSE的中等粘结强度值(P>0.05)。与MB和US相比，使用RB的SBU的应用产生了更高的平均粘结强度值（P<0.05）。粘合剂失效是主要的(65.5%)。与传统策略相比，使用新型旋转刷的CSE和SBU应用提高了纤维桩与牙根牙本质的粘结强度。
