Lenzi Tathiane Larissa, Raggio Daniela Prócida, Soares Fabio Zovico Maxnuck, Rocha Rachel de Oliveira
J Adhes Dent. 2015 Apr;17(2):125-31. doi: 10.3290/j.jad.a34058.
To investigate the bonding of a new universal adhesive applied using different etching strategies on sound and caries-affected dentin of primary teeth.
Flat dentin surfaces from 50 primary molars were randomly assigned to 10 groups according to substrate (sound dentin [SD] vs caries-affected dentin [CAD] pH cycled for 14 days) and bonding approach (Scotchbond Universal Adhesive: self-etching, vs dry or wet-bonding etch-and-rinse strategies; Adper Single Bond Plus [two-step etch-and-rinse adhesive] and Clearfil SE Bond [two-step self-etching system] as controls). After 24 h of water storage, bonded sticks with cross-sectional areas of 0.8 mm2 were tested for microtensile bond strength (μTBS). Two sticks from each tooth were immersed in silver nitrate solution in order to evaluate nanoleakage (NL) with SEM. The μTBS means were analyzed using two-way ANOVA and Tukey's tests. For NL, the Kruskal-Wallis and Mann-Whitney tests were used (α = 0.05).
The influence of the etching strategy on the bonding performance of the universal adhesive was substrate dependent. The self-etching approach resulted in lower μTBS values and higher silver nitrate uptake into hybrid layers for Scotchbond Universal Adhesive on SD, while no difference among experimental groups was observed in CAD.
It is preferable to use the universal adhesive following either a dry- or wet-bonding etch-and-rinse approach on both sound and caries-affected primary dentin.
研究一种新型通用粘结剂在乳牙健康牙本质和龋损牙本质上采用不同酸蚀策略后的粘结情况。
将50颗乳磨牙的平坦牙本质表面根据底物（健康牙本质[SD]与经14天pH循环的龋损牙本质[CAD]）和粘结方法（3M Scotchbond通用粘结剂：自酸蚀，与干粘结或湿粘结酸蚀冲洗策略；Adper Single Bond Plus[两步酸蚀冲洗粘结剂]和Clearfil SE Bond[两步自酸蚀系统]作为对照）随机分为10组。水储存24小时后，测试横截面积为0.8平方毫米的粘结棒的微拉伸粘结强度（μTBS）。将每颗牙齿的两根粘结棒浸入硝酸银溶液中，以便用扫描电子显微镜评估纳米渗漏（NL）。使用双向方差分析和Tukey检验分析μTBS平均值。对于NL，使用Kruskal-Wallis检验和Mann-Whitney检验（α = 0.05）。
酸蚀策略对通用粘结剂粘结性能的影响取决于底物。自酸蚀方法导致3M Scotchbond通用粘结剂在健康牙本质上的μTBS值较低，且混合层中硝酸银摄取量较高，而在龋损牙本质中各实验组之间未观察到差异。
在健康和龋损的乳牙本质上，采用干粘结或湿粘结酸蚀冲洗方法使用通用粘结剂更为可取。
