Hardan Louis, Orsini Giovana, Bourgi Rim, Cuevas-Suárez Carlos Enrique, Nicastro Marco, Lazarescu Florin, Filtchev Dimitar, Cornejo-Ríos Elizabeth, Zamarripa-Calderón Juan Eliezer, Sokolowski Krzysztof, Lukomska-Szymanska Monika
Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon.
Department of Clinical Sciences and Stomatology, School of Medicine, Polytechnic University of Marche, Via Tronto 10, 60126 Ancona, Italy.
Polymers (Basel). 2022 Mar 11;14(6):1129. doi: 10.3390/polym14061129.
The objective was to evaluate the influence of active bonding applications (ABA) for different time intervals after selective dentin etching (SDE) for 3 s on the microtensile bond strength (μTBS) to dentin of two universal adhesive systems (UAs): one containing 2-hydroxyethyl methacrylate (HEMA) (Scotchbond Universal, SBU), and one that was HEMA-free (Prime&Bond Universal, PBU). Dentin bovine specimens were divided into four groups: self-etch as control (SE), SDE + ABA for 15 s (SDE15), SDE + ABA for 20 s (SDE20), and SDE + ABA for 25 s (SDE25). The μTBS test was performed after a water storage of 24 h and 6 months. Scanning electron microscopy (SEM) was used in order to examine the resin−dentin interface. For the PBU, the µTBS was significantly influenced only by the aging factor (p < 0.026). A statistically significant decrease in the µTBS after 6 months of aging was observed only for the SDE15 group. For SBU, µTBS was significantly influenced by the protocol application and the aging time (p ≤ 0.041). The groups SDE15, SDE20, and SDE25 achieved statistically significant higher values (after 24 h and 6 months). No considerable variances were noticed in the homogeneity and continuity of the hybrid layer (HL) among the groups. In conclusion, SDE and ABA improved the µTBS only of a HEMA-containing universal adhesive.
目的是评估在选择性牙本质酸蚀（SDE）3秒后，不同时间间隔的活性粘结应用（ABA）对两种通用粘结系统（UA）与牙本质的微拉伸粘结强度（μTBS）的影响：一种含有甲基丙烯酸羟乙酯（HEMA）（Scotchbond Universal，SBU），另一种不含HEMA（Prime&Bond Universal，PBU）。牛牙本质标本分为四组：自酸蚀作为对照（SE）、SDE + ABA 15秒（SDE15）、SDE + ABA 20秒（SDE20）和SDE + ABA 25秒（SDE25）。在储存24小时和6个月后进行μTBS测试。使用扫描电子显微镜（SEM）检查树脂-牙本质界面。对于PBU，μTBS仅受老化因素的显著影响（p < 0.026）。仅在SDE15组中观察到老化6个月后μTBS有统计学显著下降。对于SBU，μTBS受应用方案和老化时间的显著影响（p ≤ 0.041）。SDE15、SDE20和SDE25组在24小时和6个月后达到统计学显著更高的值。各组之间混合层（HL）的均匀性和连续性未观察到明显差异。总之，SDE和ABA仅改善了含HEMA通用粘结剂的μTBS。
