Al-Dwairi Ziad Nawaf, Aleisa Khalil, Lynch Edward
Quintessence Int. 2015 Apr;46(4):299-307. doi: 10.3290/j.qi.a33283.
The purpose of this study was to compare the effect of eugenol-based and resin-based endodontic sealers on the push-out bond strengths of prefabricated fiber posts luted with different resin cements.
Ninety prefabricated fiber posts were luted into extracted singlerooted teeth with one of three resin cements (Variolink II, ParaCore, or Rely X Unicem). Each group was subdivided into three groups with 10 teeth each. The first two groups were obturated with gutta percha and one of two eugenol-based endodontic sealers (Endofil or TubliSeal) each. The third group was obturated with gutta percha and (AH26) resin-based root canal sealer. Push-out tests were performed in a universal testing machine by applying a load speed at 0.5 mm/min by using a 1-mm-diameter metallic plunger which induced a load in an apical to coronal direction. The maximum value for post dislodgement (in Newtons) was recorded. Data were collected and statistically analyzed using two-way ANOVA and Tukey multiple comparison tests (α = .05).
The highest mean bond strength values were recorded for the AH26 sealer group (non-eugenol sealer) luted with Rely X Unicem resin cement (mean ± SD = 326.1 ± 66.1 N), while the lowest mean bond strength values were observed with posts luted with Variolink II resin cement into canals obturated with gutta-percha and Endofil (eugenol-based) sealer (90.3 ± 25.2 N). There was no significant difference between the means of push-out strengths for the Endofil and TubliSeal groups (P = .745).
Eugenol-based sealers (Endofil and TubliSeal) significantly reduced the push-out bond strength of prefabricated fiber posts luted with resin cement.
本研究旨在比较丁香酚类和树脂类根管封闭剂对用不同树脂水门汀粘结的预成纤维桩推出粘结强度的影响。
将90个预成纤维桩用三种树脂水门汀（Variolink II、ParaCore或Rely X Unicem）之一粘结到拔除的单根牙中。每组再分为三组，每组10颗牙。前两组用牙胶尖和两种丁香酚类根管封闭剂（Endofil或TubliSeal）之一进行根管充填。第三组用牙胶尖和（AH26）树脂类根管封闭剂进行根管充填。在万能试验机上进行推出试验，使用直径为1mm的金属柱塞，以0.5mm/min的加载速度沿根尖向冠方施加负荷，记录桩脱位的最大值（以牛顿为单位）。收集数据并使用双向方差分析和Tukey多重比较检验进行统计分析（α = 0.05）。
用Rely X Unicem树脂水门汀粘结的AH26封闭剂组（非丁香酚类封闭剂）记录到最高的平均粘结强度值（均值±标准差 = 326.1±66.1N），而用Variolink II树脂水门汀粘结到用牙胶尖和Endofil（丁香酚类）封闭剂充填的根管中的桩观察到最低的平均粘结强度值（90.3±25.2N）。Endofil组和TubliSeal组的推出强度均值之间无显著差异（P = 0.745）。
丁香酚类封闭剂（Endofil和TubliSeal）显著降低了用树脂水门汀粘结的预成纤维桩的推出粘结强度。
