Department of Dentistry, Dentistry School, University of Rio Verde, Rio Verde, Goiás, Brazil.
Department of Dentistry, Dentistry School, Federal University of Sergipe, Aracaju, SE, Brazil.
Int Endod J. 2018 Jan;51(1):79-85. doi: 10.1111/iej.12786. Epub 2017 Jul 15.
To evaluate the alterations promoted by a thermally deposited siloxane-methacrylate coating on the surface of glass fibre posts and their effect on the bond strength of resin-core materials to the posts.
Fibre post surfaces were treated with experimental thermally deposited siloxane-methacrylate coatings or clinically available treatments (i.e. hydrogen peroxide and methylene chloride); nontreated posts were used as controls. The contact angles formed between the post surface and the water/adhesive were measured with a tensiometer. Scanning electron microscopy and electron dispersive spectroscopy were used to examine the topographies and chemical changes in the post surfaces following treatment. Surface roughness was evaluated with laser interferometry. Core resin was bonded to the fibre posts, and microtensile bond strength testing was subsequently performed. The data were individually submitted to anova and Tukey's tests (α = 0.05).
The water contact angle was reduced significantly (P < 0.05) by the thermally deposited siloxane-methacrylate coating. All treatments significantly increased the adhesive contact angle (P ≤ 0.016) compared to the control as well as the surface roughness (P ≤ 0.006) and the amount of Si on post surfaces. Greater percentages of Si were observed for the thermally deposited coating. The bond strength to the posts was significantly improved by the thermally deposited coating (P < 0.05), whereas the other treatments did not differ from the control.
Treating the surface of glass fibre posts with a thermally deposited siloxane-methacrylate coating improved the bond strength to resin-based materials. The coating could be performed by manufacturers of glass fibre posts in order to reduce the number of clinical steps required for luting posts into root canals.
评估热沉积硅氧烷-甲基丙烯酸酯涂层对玻璃纤维桩表面的改性及其对树脂核材料与桩粘结强度的影响。
纤维桩表面用实验性热沉积硅氧烷-甲基丙烯酸酯涂层或临床可用的处理方法（即过氧化氢和二氯甲烷）进行处理；未处理的桩作为对照。用张力计测量桩表面与水/胶之间形成的接触角。扫描电子显微镜和电子能谱用于检查处理后桩表面的形貌和化学变化。用激光干涉仪评估表面粗糙度。将核树脂粘结到纤维桩上，然后进行微拉伸粘结强度测试。将数据分别提交方差分析和 Tukey 检验（α=0.05）。
热沉积硅氧烷-甲基丙烯酸酯涂层显著降低了水接触角（P<0.05）。所有处理方法与对照组相比，均显著增加了胶粘剂接触角（P≤0.016）以及表面粗糙度（P≤0.006）和桩表面的 Si 含量。热沉积涂层观察到更高比例的 Si。热沉积涂层显著提高了与桩的粘结强度（P<0.05），而其他处理方法与对照组无差异。
用热沉积硅氧烷-甲基丙烯酸酯涂层处理玻璃纤维桩表面，可提高与树脂基材料的粘结强度。玻璃纤维桩的制造商可以进行这种涂层处理，以减少根管内粘固桩所需的临床步骤数量。
