Departamento de Odontología Conservadora y Prótesis Bucofacial, Facultad de Odontología, Universidad Complutense de Madrid, Pza. Ramón y Cajal, s/n. Ciudad Universitaria, 28040, Madrid, Spain.
Clin Oral Investig. 2021 May;25(5):3267-3274. doi: 10.1007/s00784-020-03658-x. Epub 2020 Oct 28.
The aim of this study was to compare the push-out bond strength (POBS) of three calcium silicate-based cements (CSBC) after exposure to saline, sodium hypochlorite (NaOCl), ethylenediaminetetraacetic acid (EDTA), and a mixture of NaOCl and etidronic acid (NaOCl+HEBP) in simulated perforation.
A total of 180 dentin slices were perforated and then filled with either Biodentine (BD), ProRoot MTA (PMTA), or Total Fill (TF). After 1 week, specimens in each group were divided into 4 subgroups (n = 15) according to the root canal irrigant (RCI) that their coronal surface was exposed to: saline, 5.25% NaOCl, 17% EDTA, or a mixture of 5.25% NaOCl and 9% HEBP (NaOCl+HEBP). A push-out test was performed, and the failure pattern was assessed. POBS data were analyzed with ANOVA and Tukey post hoc tests and the failure patterns with chi-square test.
No differences were found when comparing the effect of RCI on the POBS of PMTA. BD showed significantly higher POBS values after exposure to NaOCl+HEBP (p < .05), and those of TF were significantly lower after exposure to EDTA (p < .05). No differences in the failure patterns were found among groups.
NaOCl+HEBP had no detrimental effect on the POBS of CSBC.
The mixture of sodium hypochlorite and etidronic acid may be considered as an alternative irrigant when treating root perforations.
本研究旨在比较三种硅酸钙基水泥（CSBC）在模拟穿孔中经生理盐水、次氯酸钠（NaOCl）、乙二胺四乙酸（EDTA）和次氯酸钠与依替膦酸（NaOCl+HEBP）混合物处理后的推出强度（POBS）。
共制备 180 个牙本质切片并穿孔，然后分别用 Biodentine（BD）、ProRoot MTA（PMTA）或 Total Fill（TF）填充。1 周后，根据根管冲洗液（RCI）将每组样本分为 4 个亚组（n = 15）：生理盐水、5.25% NaOCl、17% EDTA 或 5.25% NaOCl 和 9% HEBP（NaOCl+HEBP）。进行推出试验，评估失效模式。用方差分析和 Tukey 事后检验分析 POBS 数据，用卡方检验分析失效模式。
比较 RCI 对 PMTA POBS 的影响时，未发现差异。BD 经 NaOCl+HEBP 处理后 POBS 值显著升高（p <.05），TF 经 EDTA 处理后 POBS 值显著降低（p <.05）。各组间失效模式无差异。
NaOCl+HEBP 对 CSBC 的 POBS 无不良影响。
当治疗根管穿孔时，次氯酸钠和依替膦酸混合物可考虑作为替代冲洗液。
