J Adhes Dent. 2017;19(4):317-321. doi: 10.3290/j.jad.a38890.
To evaluate the bonding performance of a universal adhesive to sound and artificially-created caries-affected dentin, using either the etch-and-rinse or self-etch strategy.
Flat midcoronal dentin surfaces from 48 third molars were randomly assigned to eight groups according to the substrate (sound dentin and artificially-created caries-affected dentin [pH cycling for 14 days]) and the adhesive or application mode (Scotchbond Universal: self-etch or etch-and-rinse strategies; Adper Single Bond 2 and Clearfil SE Bond, a two-step etch-and-rinse adhesive and a two-step self-etch adhesive as controls, respectively). Then, composite blocks were constructed, the specimens were further stored in water for 24 h, and composite-dentin sticks were prepared (0.8 mm2) and tested under tension at 1.0 mm/min. Data were analyzed with two-way ANOVA and Tukey's test (α = 0.05).
All adhesives tested on artificially-created caries-affected dentin presented similar μTBS (p > 0.05), and inferior bonding performance when compared to sound dentin (p = 0.000). On sound dentin, Scotchbond Universal presented higher bond strengths when applied in the etch-and-rinse than self-etch mode, but comparable bond strength in each application mode in relation to the respective control adhesive (p = 0.04).
Scotchbond Universal can be used in different application modes when bonded to artificially-created caries-affected dentin; however, the etch-and-rinse strategy improves its bonding ability to sound dentin. Moreover, Adper Single Bond 2 and Clearfil SE Bond presented similar bond strengths, regardless of the dentin condition and comparable performance in relation to each strategy of Scotchbond Universal.
评估通用粘结剂在酸蚀-冲洗或自酸蚀两种应用模式下，对正常牙本质和人工龋损牙本质的粘结性能。
48 颗第三磨牙的近中牙冠平坦表面，根据基底（正常牙本质和人工龋损牙本质[pH 值循环 14 天]）和粘结剂或应用模式（Scotchbond Universal：自酸蚀或酸蚀-冲洗策略；Adper Single Bond 2 和 Clearfil SE Bond，分别为两步酸蚀-冲洗粘结剂和两步自酸蚀粘结剂作为对照），随机分为 8 组。然后，构建复合块，将标本在水中进一步储存 24 h，制备复合-牙本质棒（0.8 mm2），并以 1.0 mm/min 的速度进行拉伸测试。采用双因素方差分析和 Tukey 检验（α = 0.05）进行数据分析。
所有在人工龋损牙本质上测试的粘结剂的 μTBS 相似（p > 0.05），与正常牙本质相比，粘结性能较差（p = 0.000）。在正常牙本质上，Scotchbond Universal 在酸蚀-冲洗应用模式下的粘结强度高于自酸蚀应用模式，但在每种应用模式下与各自的对照粘结剂的粘结强度相当（p = 0.04）。
Scotchbond Universal 可在不同的应用模式下用于粘结人工龋损牙本质；然而，酸蚀-冲洗策略可提高其对正常牙本质的粘结能力。此外，Adper Single Bond 2 和 Clearfil SE Bond 的粘结强度相似，无论牙本质状况如何，与 Scotchbond Universal 的每种应用模式的性能相当。
