Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
J Endod. 2012 Feb;38(2):219-21. doi: 10.1016/j.joen.2011.10.018. Epub 2011 Dec 3.
This study aimed at evaluating the bond strength to root dentin of 2 mineral trioxide aggregate (MTA)-based sealers (Endo-CPM sealer and MTA Fillapex) and of 1 epoxy resin-based sealer (AH Plus sealer).
Forty-five extracted human teeth with single roots were prepared by using the step-back technique. Irrigation with 2.5% NaOCl and a final rinse with 17% ethylenediaminetetraacetic acid and distilled water were performed. Canals were filled by using Endo-CPM sealer, MTA Fillapex, or AH Plus sealer by means of the gutta-percha lateral condensation technique. After 7 days, the roots were sectioned perpendicularly to its long axis, and the push-out test was carried out. The data were analyzed by using the Kruskal-Wallis and Dunn post hoc tests.
Endo-CPM sealer showed the highest values of bond strength to root dentin (8.265 MPa) (P < .05). The values of push-out test were similar for MTA Fillapex (2.041 MPa) and AH Plus (3.034 MPa).
On the basis of the findings presented herein and within the limitations of this study, Endo-CPM sealer presented advantages when a post preparation was required. MTA Fillapex presented acceptable resistance to dislodgement, which was similar to that observed in samples filled with AH Plus sealer.
本研究旨在评估 2 种矿化三氧化物聚合体（MTA）基密封剂（Endo-CPM 密封剂和 MTA Fillapex）和 1 种环氧树脂基密封剂（AH Plus 密封剂）与根管牙本质粘结强度。
45 颗具有单根的人离体牙采用后退技术制备。使用 2.5%次氯酸钠冲洗，并用 17%乙二胺四乙酸和蒸馏水进行最终冲洗。使用牙胶侧向压缩技术分别用 Endo-CPM 密封剂、MTA Fillapex 或 AH Plus 密封剂填充根管。7 天后，将牙根沿其长轴垂直切割，并进行推出试验。使用 Kruskal-Wallis 和 Dunn 事后检验对数据进行分析。
Endo-CPM 密封剂对根管牙本质的粘结强度最高（8.265 MPa）（P <.05）。MTA Fillapex（2.041 MPa）和 AH Plus（3.034 MPa）的推出试验值相似。
基于本研究中的发现，并在本研究的限制范围内，当需要桩核预备时，Endo-CPM 密封剂具有优势。MTA Fillapex 表现出可接受的抗脱位能力，与填充 AH Plus 密封剂的样本相似。
