Conservative Dentistry Department, School of Dentistry, Federal University of Rio Grande do Sul - UFRGS, Porto Alegre, Brazil.
Department of Endodontics, University of Passo Fundo, Passo Fundo, Rs, Brazil.
Braz Dent J. 2022 Mar-Apr;33(2):91-98. doi: 10.1590/0103-6440202204529.
This study aimed to evaluate the influence of calcium silicate-based sealers on the bond strength of fiber posts using conventional and self-adhesive resin cement. Sixty single-rooted teeth were selected. The canals were prepared with a reciprocating instrument 40.06. The roots were randomly distributed in six groups (n = 10) according to the strategies for root canal filling and fiber posts cementation: AH Plus/RelyX ARC; AH Plus/RelyX U200; Bio C Sealer/RelyX ARC; Bio C Sealer/RealyX U200; Sealer Plus BC/RelyX ARC; and Sealer Plus BC/RelyX U200. The roots were transversally sectioned, and one slice per post-third was obtained. The push-out test was performed at a crosshead speed of 1mm/min. The failure patterns were described after assessment with a stereomicroscope with a 10× magnification. Bond strength was calculated and analyzed using the ANOVA and Tukey test. AH Plus did not influence the bond strength of fiber posts cemented with conventional (RelyX ARC) or with self-adhesive resin cement (RelyX U200). The lowest bond strength values were obtained when calcium silicate-based sealers were associated with conventional resin cement (Bio C Sealer/RelyX ARC and Sealer Plus BC/RelyX ARC). Except for Sealer Plus BC/RelyX ARC, all groups presented lower bond strength at the apical portion compared to the cervical portion of the post. Adhesive failures between cement and post and cement and dentin were predominant (55.3%). Calcium silicate-based sealers decreased the bond strength of fiber posts cemented with conventional resin cement.
本研究旨在评估硅酸钙基密封剂对使用传统和自粘接树脂水泥的纤维桩粘结强度的影响。选择 60 颗单根牙。使用往复器械 40.06 制备根管。根据根管充填和纤维桩粘结策略，将牙根随机分为 6 组（n = 10）：AH Plus/RelyX ARC；AH Plus/RelyX U200；Bio C 密封剂/RelyX ARC；Bio C 密封剂/RelyX U200；Sealer Plus BC/RelyX ARC；和 Sealer Plus BC/RelyX U200。将牙根横断，每根桩的第三部分获得一个切片。以 1mm/min 的十字头速度进行推出试验。在 10×放大倍率的立体显微镜下评估后描述失效模式。使用 ANOVA 和 Tukey 检验计算和分析粘结强度。AH Plus 不影响用传统树脂水泥（RelyX ARC）或自粘接树脂水泥（RelyX U200）粘结的纤维桩的粘结强度。当硅酸钙基密封剂与传统树脂水泥（Bio C 密封剂/RelyX ARC 和 Sealer Plus BC/RelyX ARC）结合时，获得的粘结强度值最低。除了 Sealer Plus BC/RelyX ARC 之外，所有组在根尖部分的粘结强度均低于桩的颈部部分。水泥与桩和牙本质之间的粘接力失败为主（55.3%）。硅酸钙基密封剂降低了用传统树脂水泥粘结的纤维桩的粘结强度。
