Nicoloso Gabriel Ferreira, Carvalho Marcos Paulo, Soares Fabio Zovico Maxnuck, Susin Alexandre Henrique, Rocha Rachel Oliveira
Gen Dent. 2019 May-Jun;67(3):71-76.
The aim of this study was to compare the effects of 2 aging methods on the dentin bond strength of different adhesive systems, including a universal adhesive. Seventy-two third molars were sectioned to create flat midcoronal dentin surfaces, which were randomly assigned to 12 groups (n = 6 each) according to the aging method (conventional aging, defined as 6 months of water storage; accelerated aging by means of a pH-cycling method; or negative control [immediate bond strength]) and adhesive system (Adper Single Bond 2, Clearfil SE Bond, Prime & Bond 2.1, or Scotchbond Universal). Composite resin blocks were constructed on the flattened dentin surfaces after application of the appropriate adhesive, and the specimens were stored in water for 24 hours. Specimens from the control group were immediately sectioned into resin-dentin sticks (0.8 mm2) and subjected to a microtensile bond strength test. Specimens from the experimental groups were sectioned and tested after undergoing the assigned aging method. Data were analyzed with 2-way analysis of variance and a Tukey test (α = 0.05). The study findings showed that neither aging method significantly affected the dentin bond strength (P = 0.917). Of the 4 adhesives, Adper Single Bond 2 had the highest bond strength value after aging (P < 0.001). Scotchbond Universal adhesive demonstrated statistically significantly higher bond strength values than Clearfil SE Bond and Prime & Bond 2.1, which had statistically similar values. Adhesive failures at the resin-dentin interface or adhesive failures mixed with cohesive failure of the adjacent substrate predominated in all groups. The 2 aging processes did not result in degradation of the adhesive interface or jeopardize the dentin bond strength of any of the adhesives tested.
本研究的目的是比较两种老化方法对不同粘结系统（包括一种通用粘结剂）牙本质粘结强度的影响。将72颗第三磨牙进行切片，以制备平坦的牙冠中部牙本质表面，根据老化方法（传统老化，定义为储存6个月的水；通过pH循环法加速老化；或阴性对照[即时粘结强度]）和粘结系统（Adper Single Bond 2、Clearfil SE Bond、Prime & Bond 2.1或Scotchbond Universal）将其随机分为12组（每组n = 6）。在应用适当的粘结剂后，在平坦的牙本质表面构建复合树脂块，并将标本在水中储存24小时。对照组的标本立即切成树脂-牙本质棒（0.8 mm2），并进行微拉伸粘结强度测试。实验组的标本在经过指定的老化方法后进行切片和测试。数据采用双向方差分析和Tukey检验进行分析（α = 0.05）。研究结果表明，两种老化方法均未对牙本质粘结强度产生显著影响（P = 0.917）。在4种粘结剂中，Adper Single Bond 2在老化后的粘结强度值最高（P < 0.001）。Scotchbond Universal粘结剂的粘结强度值在统计学上显著高于Clearfil SE Bond和Prime & Bond 2.1，后两者的粘结强度值在统计学上相似。所有组中，树脂-牙本质界面的粘结失败或与相邻基底的内聚破坏混合的粘结失败占主导。这两种老化过程均未导致粘结界面降解或危及所测试的任何粘结剂的牙本质粘结强度。
