Soon Hooi Imm, Gill Daljit S, Jones Steven P
J Orthod. 2015 Sep;42(3):192-9. doi: 10.1179/1465313315Y.0000000003. Epub 2015 Apr 6.
In this study, we compared the shear bond strengths of five different adhesive techniques for attaching metal orthodontic brackets onto acrylic pontics.
Two hundred upper left lateral incisor acrylic teeth with bonded brackets were divided into five groups - composite alone (control), composite following sandblasting, composite held with a mechanical undercut, cyanoacrylate adhesive and Panavia(®). The initial bond strength was tested using the Instron Universal Testing Machine. The fatigue bond strength was tested by subjecting each bracket to 5000 repetitive low-load cycles at 50% of the mean shear bond strength using the Dartec machine at 2 Hz.
Cyanoacrylate adhesive statistically exhibited the highest mean bond strength (19·82 MPa). This was followed by the mechanical undercut group (17·69 MPa) and the sandblasted group (17·18 MPa). There was no statistically significant difference when considering the effect of fatiguing (p = 0·238) as well as the interaction between the adhesive technique and the effect of fatiguing on the bond strength (p = 0·440).
The initial and fatigue bond strengths of the cyanoacrylate adhesive, sandblasted and undercut groups were significantly higher than the control and Panavia(®) groups when tested under laboratory conditions.
在本研究中，我们比较了五种不同粘接技术将金属正畸托槽粘接到丙烯酸树脂桥体上的剪切粘接强度。
将200颗粘接了托槽的左上侧切牙丙烯酸树脂牙分为五组——单纯复合树脂组（对照组）、喷砂后复合树脂组、有机械倒凹的复合树脂组、氰基丙烯酸酯胶粘剂组和帕纳维亚（Panavia）组。使用英斯特朗万能材料试验机测试初始粘接强度。使用Dartec机器以2赫兹的频率对每个托槽施加平均剪切粘接强度50%的5000次重复低负荷循环，测试疲劳粘接强度。
氰基丙烯酸酯胶粘剂在统计学上表现出最高的平均粘接强度（19.82兆帕）。其次是机械倒凹组（17.69兆帕）和喷砂组（17.18兆帕）。在考虑疲劳影响（p = 0.238）以及粘接技术与疲劳对粘接强度影响之间的相互作用（p = 0.440）时，没有统计学上的显著差异。
在实验室条件下测试时，氰基丙烯酸酯胶粘剂组、喷砂组和倒凹组的初始和疲劳粘接强度显著高于对照组和帕纳维亚组。
