Division of Endodontics, Department of Restorative Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Private Practice, Riyadh, Saudi Arabia.
BMC Oral Health. 2020 Feb 18;20(1):57. doi: 10.1186/s12903-020-1044-6.
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)) 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).
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), 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.
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) 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.
Ca(OH) 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) or mTAP.
在包括创伤后多次就诊的根管治疗或再生性根管治疗在内的各种根管治疗情况下，都可以使用根管内药物。在放置填充或修复材料之前，应将这些药物从根管中清除。本研究的目的是评估与三氧化物聚合体（MTA）相比，氢氧化钙（Ca（OH））和改良三联抗生素糊剂（mTAP）在根管内预先放置对 TotalFill BC 快速凝固腻子（BC 快速凝固腻子）与根管牙本质之间的推出粘结强度的影响。
将 45 颗下颌前磨牙的根管制备至标准化内径（1.5mm）。根据使用的根管内药物，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）和无根管内药物。1 周后，去除药物，将根尖 1/3 切成两个横切面（2.0±0.05）（n=90 片）。此后，将标本分为两组（每组 n=45）：MTA 或 BC 腻子。1 周后，进行推出试验并评估失效模式。使用双因素方差分析和 Tukey 事后检验对数据进行统计分析。
根管内药物的应用并未显著影响 BC 腻子的粘结强度（p>.05）。对于 MTA，先前应用 Ca（OH）或 mTAP 显著降低了脱位阻力（p<.05）。MTA 亚组的标本显示出几乎相等数量的内聚和混合类型的失效，而大多数 BC 腻子亚组的标本显示出内聚类型。
与对照组相比，Ca（OH）和 mTAP 促进了 MTA 与牙本质的粘结强度降低。然而，先前用 Ca（OH）或 mTAP 处理药物对 BC 快速凝固腻子与牙本质的粘结强度没有影响。
