J Adhes Dent. 2017;19(4):341-348. doi: 10.3290/j.jad.a38896.
To examine the effect of CHX pre-treatment on long-term bond strength of fiber posts luted with self-adhesive resin cements.
Seventy-two single-rooted teeth were selected for root canal treatment and post space preparation. The tested self-adhesive cement/post combinations were (N = 36): 1. RelyX Fiber-Posts luted with RelyX Unicem; 2. Rebilda Posts luted with Bifix SE Cement. For both self-adhesive cements, half of the specimens (experimental groups) were luted after the application of a solution of 2% CHX, while no CHX application was performed for the remaining specimens (control groups). Luted specimens were cut and used for push-out bond strength evaluation immediately, and after storage in artificial saliva for 6 months or 1 year. Additional specimens were processed for quantitative interfacial nanoleakage analysis.
ANOVA showed that the variable times of storage had a significant influence on the results (p < 0.05), while no influence of the luting procedure (cements with or without CHX) on the final outcome (p > 0.05) was found. Tukey's pairwise post-hoc test showed that the radicular bond strength decreased with time of storage. In particular, a significant difference was found between T0 and T1y, but not between T0 and T6m. In contrast, in terms of pretreatment, no significant reduction in push-out bond strength was observed, irrespective of the aging time.
CHX pretreatment did not prevent bond strength degradation of fiber posts luted with self-adhesive cements.
研究 CHX 预处理对自粘接树脂水门汀黏固纤维桩长期黏结强度的影响。
选择 72 颗单根牙进行根管治疗和桩道预备。测试的自粘接水门汀/桩组合为（N=36）：1. RelyX Fiber-Posts 用 RelyX Unicem 黏固；2. Rebilda Posts 用 Bifix SE 黏固。对于这两种自粘接水门汀，一半试件（实验组）在应用 2% CHX 溶液后黏固，另一半试件（对照组）不应用 CHX。黏固试件立即切割并用于推出黏结强度评估，以及在人工唾液中储存 6 个月或 1 年后。另外的试件用于定量界面纳米渗漏分析。
方差分析显示，储存时间的变量对结果有显著影响（p<0.05），而黏固程序（有无 CHX 的水门汀）对最终结果无影响（p>0.05）。Tukey 氏事后检验显示，根方黏结强度随储存时间的延长而降低。特别是在 T0 与 T1y 之间存在显著差异，但在 T0 与 T6m 之间没有差异。相比之下，在预处理方面，无论老化时间如何，黏结强度均无显著降低。
CHX 预处理不能防止自粘接树脂水门汀黏固纤维桩黏结强度的降解。
