Bacchi Ataís, Abuna Gabriel, Babbar Ashvin, Sinhoreti Mário Alexandre Coelho, Feitosa Victor Pinheiro
J Adhes Dent. 2015 Jun;17(3):265-71. doi: 10.3290/j.jad.a34414.
To assess the influence of simulated pulpal pressure (SPP) on the microtensile bond strength (μTBS) of four simplified luting strategies to indirect composite restorations.
Dentin disks from 40 human molars were prepared and treated with 4 different techniques: (1) SB+ARC: two-step etch-and-rinse adhesive + conventional dual-curing resin cement (Adper Single Bond 2 + RelyX ARC, 3M ESPE); (2) ED+PAN: self-etching primer + conventional dual-curing resin cement (ED Primer + Panavia F2.0, Kuraray Medical); (3) S3+PAN: one-step self-etching adhesive (Clearfil S3, Kuraray) + Panavia F2.0; (4) U200: self-adhesive resin cement (RelyX U200, 3M ESPE). Pre-made indirect composite restorations (Filtek Z100, 3M ESPE) were luted onto the specimens. The luted specimens were cut into resin-dentin beams and the μTBS was tested after two different aging regimes: water storage at 37°C for one week (control) or three months under 20 cm H2O simulated pulpal pressure (SPP). The μTBS data was analyzed with two-way ANOVA and Tukey's test (p < 0.05).
SB+ARC showed significantly higher μTBS after both aging regimes (p < 0.001). The statistically significantly lowest μTBS was measured for control S3+PAN and U200 after 3 months SPP (p < 0.001). S3+PAN was the only group not negatively affected by SPP (p = 0.699).
Two-step etch-and-rinse adhesives associated with dual-curing conventional resin cements may achieve the highest μTBS, even after 3 months of SPP. The one-step self-etching adhesive along with the dualcuring conventional resin cement was able to maintain bond stability.
评估模拟牙髓压力（SPP）对四种简化粘结策略用于间接复合树脂修复体的微拉伸粘结强度（μTBS）的影响。
制备40颗人类磨牙的牙本质片，并用4种不同技术进行处理：（1）SB + ARC：两步酸蚀冲洗粘结剂 + 传统双重固化树脂水门汀（Adper Single Bond 2 + RelyX ARC，3M ESPE）；（2）ED + PAN：自酸蚀底漆 + 传统双重固化树脂水门汀（ED Primer + Panavia F2.0，可乐丽医疗）；（3）S3 + PAN：一步自酸蚀粘结剂（Clearfil S3，可乐丽）+ Panavia F2.0；（4）U200：自粘结树脂水门汀（RelyX U200，3M ESPE）。将预制的间接复合树脂修复体（Filtek Z100，3M ESPE）粘结到标本上。将粘结后的标本切割成树脂 - 牙本质梁，并在两种不同的老化条件后测试μTBS：在37°C水中储存一周（对照）或在20 cm H2O模拟牙髓压力（SPP）下储存三个月。μTBS数据采用双向方差分析和Tukey检验进行分析（p < 0.05）。
在两种老化条件下，SB + ARC均显示出显著更高的μTBS（p < 0.001）。在3个月SPP后，对照S3 + PAN和U200的μTBS在统计学上显著最低（p < 0.001）。S3 + PAN是唯一不受SPP负面影响的组（p = 0.699）。
即使在3个月的SPP后，与双重固化传统树脂水门汀相关联 的两步酸蚀冲洗粘结剂可能实现最高的μTBS。一步自酸蚀粘结剂与双重固化传统树脂水门汀能够维持粘结稳定性。
