BACKGROUND Intracanal medicaments can be used in various endodontic conditions including multiple visit endodontics after trauma or in regenerative endodontics. These medicaments should be removed from the root canal before the placement of the filling or repair material. The aim of the present study was to evaluate the effect of prior calcium hydroxide (Ca(OH)2) and modified triple antibiotic paste (mTAP) placement on the push-out bond strength of TotalFill BC fast set putty (BC fast set putty) to root dentin when compared to mineral trioxide aggregate (MTA). METHODS The root canals of 45 extracted mandibular premolars were prepared to a standardized internal diameter (1.5 mm). The specimens were randomly assigned to 3 groups according to the intracanal medicament used: mTAP (a mixture of metronidazole, ciprofloxacin, and cefaclor), Ca(OH)2, and no intracanal medicament. After 1 week, the medicaments were removed, and the middle third of the roots were cut into two transverse sections (2.0 ± 0.05) (n = 90 slices). Thereafter, the specimens were divided into two subgroups (n = 45 each): MTA or BC putty. After 1 week, the push-out test was performed and failure mode was evaluated. The data were statistically analyzed using two-way ANOVA and Tukey's post hoc. RESULTS The application of the intracanal medicament did not significantly affect the bond strength of BC putty (p > .05). For MTA, the prior application of Ca(OH)2 or mTAP significantly decreased the dislocation resistance (p < .05). Specimens in the MTA subgroups showed an almost equal number of cohesive and mixed types of failure while the majority of the specimens in the BC putty subgroups revealed the cohesive type. CONCLUSIONS Ca(OH)2 and mTAP promoted lower bond strength of MTA to root dentin compared to the control group. However, the BC fast set putty bond strength to dentin was not affected by prior medication with Ca(OH)2 or mTAP.

中文翻译：

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牙髓治疗中使用的管内药物对两种硅酸钙基填充材料的抗脱位性的影响。

背景技术管内药物可用于各种牙髓疾病中，包括创伤后的多次探访牙髓或再生性牙髓。在放置填充或修复材料之前，应从根管中取出这些药物。本研究的目的是评估先前的氢氧化钙（Ca（OH）2）和改良的三重抗生素糊剂（mTAP）放置对TotalFill BC快速固化腻子（BC快速固化腻子）的推出粘结强度的影响。与三氧化二矿骨料（MTA）相比，其对牙本质根的影响更大。方法将45个拔除的下颌前磨牙的根管准备成标准化的内径（1.5 mm）。根据所用的腔内药物将标本随机分为3组：mTAP（甲硝唑，环丙沙星和头孢克洛的混合物），Ca（OH）2，而且没有管内药物。1周后，将药物去除，将根的中三分之一切成两个横切面（2.0±0.05）（n = 90片）。此后，将标本分为两个亚组（每个n = 45）：MTA或BC腻子。1周后，进行推出测试并评估故障模式。使用双向方差分析和Tukey post hoc对数据进行统计分析。结果管内药物的应用并没有显着影响BC腻子的粘结强度（p> .05）。对于MTA，事先使用Ca（OH）2或mTAP可以显着降低位错阻力（p <.05）。MTA亚组的标本显示出几乎相同数量的内聚和混合失效类型，而BC油灰亚组的大多数标本显示出内聚类型。结论与对照组相比，Ca（OH）2和mTAP促进了MTA与根部牙本质的较低结合强度。但是，BC与牙本质的快速固化腻子粘结强度不受先前使用Ca（OH）2或mTAP的药物的影响。