Department of Restorative Dentistry, Ceuma University, São Luís, Maranhão, Brazil.
Department of Restorative Dentistry, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil.
J Dent. 2023 Sep;136:104633. doi: 10.1016/j.jdent.2023.104633. Epub 2023 Jul 23.
To evaluate the microtensile bond strength (µTBS) and nanoleakage (NL) of several universal adhesives to eroded dentine (ED) using etch-and-rinse (ER) and self-etch (SE) strategies, immediately and after 6 years of water storage.
Four hundred and eighty human molars were distributed into 60 groups according to dentine substrate (sound dentine [SD], eroded with soft drink, or eroded with citric acid), application method of the adhesive (SE or ER), and the adhesives used: 1. All-Bond Universal, 2. Ambar Universal, 3. Clearfil Universal, 4. Futurabond U, 5. One Coat 7 Universal, 6. Peak Universal Bond, 7. Prime&Bond Elect, 8. Scotchbond Universal, 9. Tetric n-bond Universal, and 10. Xeno Select. The restoration was then performed with a composite resin, and the specimens were sectioned into resin-dentine bonded sticks. The sticks were tested (immediately or after 6 years of storage) for µTBS (0.5 mm/min) or used to assess NL. The eroded dentine surfaces were also examined using FE-SEM to evaluate the NL. Data for µTBS were analyzed by four-way ANOVA and Tukey's post-hoc test (a = 0.05), and the NL was analyzed by Kruskal-Wallis and the Wilcoxon Signed Rank Sum test (a = 0.05).
In ED, there was no difference in μTBS and NL between ER and SE strategies (p > 0.05). Most μTBS and NL values obtained for ED were lower and higher, respectively, than those for SD (p < 0.005). Additionally, the worst results (μTBS and NL) were observed for erosion with citric acid groups in comparison with erosion with soft-drink groups (p < 0.007). After 6y, μTBS was generally lower and NL higher for all substrates, adhesives, and strategies (p < 0.05), except for AMB, SBU, and TEU in dentine eroded with citric acid. The lowest μTBS and highest NL values were observed for ABU, FBU, OCU, PUB, PBE, and XEN in both types of eroded dentine and evaluation times (p < 0.002).
The use of MDP-containing adhesives seems to be essential to maintain adhesion to eroded dentine. However, other factors such as acidity should be considered.
The bonding of eroded dentine is a challenge. However, the use of MDP-containing universal adhesives showed less degradation after long-term evaluation.
评估几种通用型胶粘剂在酸蚀牙本质（ED）上即刻和 6 年水储存后的微拉伸粘结强度（µTBS）和纳米渗漏（NL），使用全酸蚀（ER）和自酸蚀（SE）策略。
将 480 个人类磨牙根据牙本质基底（正常牙本质[SD]、软饮料酸蚀或柠檬酸酸蚀）、胶粘剂的应用方法（SE 或 ER）和使用的胶粘剂分为 60 组：1. All-Bond Universal、2. Ambar Universal、3. Clearfil Universal、4. Futurabond U、5. One Coat 7 Universal、6. Peak Universal Bond、7. Prime&Bond Elect、8. Scotchbond Universal、9. Tetric n-bond Universal 和 10. Xeno Select。然后用复合树脂进行修复，将标本切成树脂-牙本质粘结棒。在即刻或 6 年储存后，对粘结棒进行 µTBS（0.5mm/min）测试或用于评估 NL。还使用 FE-SEM 检查酸蚀牙本质表面以评估 NL。µTBS 数据采用四因素方差分析和 Tukey 事后检验（a=0.05），NL 采用 Kruskal-Wallis 和 Wilcoxon 符号秩和检验（a=0.05）。
在 ED 中，ER 和 SE 策略之间的 µTBS 和 NL 没有差异（p>0.05）。与 SD 相比，ED 获得的大多数 µTBS 和 NL 值分别较低和较高（p<0.005）。此外，与软饮料酸蚀组相比，柠檬酸酸蚀组的结果最差（µTBS 和 NL）（p<0.007）。6 年后，所有基底、胶粘剂和策略的 µTBS 普遍较低，NL 较高（p<0.05），柠檬酸酸蚀的 AMB、SBU 和 TEU 除外。在两种类型的酸蚀牙本质和评估时间中，ABU、FBU、OCU、PUB、PBE 和 XEN 的 µTBS 最低，NL 最高（p<0.002）。
使用含 MDP 的胶粘剂似乎对保持对酸蚀牙本质的粘结至关重要。然而，还应考虑其他因素，如酸度。
酸蚀牙本质的粘结是一个挑战。然而，经过长期评估，使用含 MDP 的通用型胶粘剂显示出较低的降解。
