OBJECTIVE: The aim of this study was to verify the influence of endodontic sealers on the bond strength of an adhesive system and a resin cement used for carbon posts cementation. METHODS: Thirty extracted human premolars were instrumented and randomly divided into three groups according to the tested sealer: EndoFill, Sealapex, or EndoREZ. Specimens were stored at 37 degrees C. After 48 h, half of specimens were prepared to receive the post and the others after 7 days. The posts were cemented with Adper Single Bond/Rely X ARC and stored in distilled water at 37 degrees C for 7 days. After this period, the specimens were sectioned in three slices (coronal, middle, and apical). The push-out test was performed in a universal machine and the debonded area was examined in a stereomicroscope. RESULTS: Data were submitted ANOVA and Tukey test (alpha = 0.05). The EndoFill showed lower bond strength than other sealers (p < 0.01). The EndoREZ sealer was statistically greater than other groups for coronal and middle portions and similar for apical portion (p > 0.05). Coronal and middle portions showed the best results for all groups, mainly when the canal preparation was performed after 48 h (p < 0.01). Mixed failure occurs with more frequency (55.6%) followed by failure in adhesive-dentin interface (34.4%) and adhesive-post interface (10.0%). CONCLUSION: The use of EndoREZ sealer promoted higher bond strength in root coronal and middle portions when carbon post was fixed with a resin cement.
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机译：目的：本研究的目的是验证牙髓封闭剂对胶粘剂体系和用于碳桩固结的树脂胶粘剂粘结强度的影响。方法：对提取的30颗人类前磨牙进行检测，并根据测试的封闭剂将其随机分为三组：EndoFill，Sealapex或EndoREZ。将标本保存在37摄氏度下。48小时后，准备好一半标本用于接收柱子，其余标本则在7天后接收。用Adper Single Bond / Rely X ARC将桩固结，并在37摄氏度的蒸馏水中保存7天。在此之后，将标本切成三段（冠状，中层和根尖）。在通用机器中进行推出测试，并在体视显微镜中检查剥离的区域。结果：数据提交方差分析和Tukey检验（alpha = 0.05）。与其他密封剂相比，EndoFill的粘结强度更低（p <0.01）。 EndoREZ封闭剂在冠状和中间部分的统计学上高于其他组，在顶端部分相似（p> 0.05）。冠状和中部显示所有组的最佳结果，主要是在48小时后进行根管准备时（p <0.01）。混合失效发生的频率更高（55.6％），其次是粘合剂-牙本质界面的失效（34.4％）和粘合剂-柱界面的失效（10.0％）。结论：当用树脂水泥固定碳桩时，使用EndoREZ封闭剂可促进冠状冠状和中部较高的粘结强度。
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